Preliminary Data Sheet
August 2000

TTRN012G5 (2.5 Gbits/s) and TTRN012G7 (2.5 Gbits/s and 2.7 Gbits/s)

Clock Synthesizer, 16:1 Data Multiplexer

Features

TTRN012G5 supports OC-48/STM-16 data rate

TTRN012G7 supports:

-- OC-48/STM-16 data rate
-- RS (255, 239) forward error correction (FEC)

OC-48/STM-16 data rate

Fully integrated clock synthesizer and 16:1 data
multiplexer

Supports clockless data transfer into the 16:1
multiplexer

Parity checking and valid data indication

Data inversion option

Additional high-speed CML serial data output for
system loopback

Loss of lock indication

Single 3.3 V supply

Available in either MBIC 025 BiCMOS technology
or lower-power MBIC 025 silicon germanium
BiCMOS technology

LVPECL 155.52 Mbits/s digital I/O

Jitter generation and jitter transfer compliant with
the following:
--

Telcordia Technologies

* GR-253

-- ITU-T G.825
-- ITU-T G.958

Applications

SONET/SDH line origination equipment

SONET/SDH add/drop multiplexers

SONET/SDH cross connects

SONET/SDH test equipment

Digital video transmission

Telcordia Technologies

is a registered trademark of Bell Com-

munications Research, Inc.

Description

The Lucent Technologies Microelectronics Group
TTRN012G5 operates at the OC-48/STM-16 data
rate of 2.5 Gbits/s. The TTRN012G7 device operates
at either 2.5 Gbits/s or the RS FEC OC-48/STM-16
data rate of 2.7 Gbits/s. For clarity, this data sheet
refers to the TTRN012G5 serial data rate as
2.5 Gbits/s and the parallel data and reference clock
frequency as 155 MHz. (The precise rates are
2.48832 Gbits/s and 155.52 MHz.) When using the
TTRN012G7 at the FEC rate, the 2.5 Gbits/s data
rate should be interpreted as 2.7 Gbits/s and the par-
allel and clock frequency should be interpreted as
166 MHz. (The precise rates are 2.66606 Gbits/s and
166.62 MHz.)

The devices provide a 16:1 multiplexer and clock
multiplier unit. Both a high-speed serial clock and
data output are generated. The devices accept 16
differential PECL data inputs and a low-speed refer-
ence clock. A unique feature of the multiplexer is that
no clock is required to feed in the 16 data lines, as
long as the upstream data chip clock is synchronous
with the device REFCLKP/N input.

Alternatively, contra-clocking may be used, whereby
the device provides one of four phases of a
155.52 MHz or 166.62 MHz clock output back
upstream to the data chip.

Other features include a parity bit input and parity
check on the 16 input data lines, a second
2.5 Gbits/s or 2.7 Gbits/s data output for loopback
toward the TRCV012G5 or TRCV012G7 device, and
a user-configurable PLL bandwidth. Both devices are
available in either BiCMOS or in SiGe BiCMOS tech-
nology for lower power operation.

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Table of Contents

Contents

Page

Features .................................................................................................................................................................... 1
Applications ............................................................................................................................................................... 1
Description................................................................................................................................................................. 1
Pin Information .......................................................................................................................................................... 4
Functional Overview .................................................................................................................................................. 9

Clock Synthesizer Operation .................................................................................................................................. 9
Multiplexer Operation............................................................................................................................................ 11

Clocking Modes and Timing Adjustments ............................................................................................................... 12

Clockless Transfer Mode (CLKMODE, EXTADJN, MONAPAP/N) ....................................................................... 12
Contra-Directional Clocking Mode (CLKMODE, PHADJ[1:0]) .............................................................................. 13

CML Output Structure (Used on Pins D2G5P/N, CK2G5P/N)................................................................................. 14

Choosing the Value of the External CML Reference Resistors (RREF1, RREF2) ............................................... 14

Absolute Maximum Ratings.....................................................................................................................................15
Handling Precautions .............................................................................................................................................. 15
Operating Conditions............................................................................................................................................... 15
Electrical Characteristics ......................................................................................................................................... 16

Reference Frequency (REFCLKP/N) Specifications............................................................................................. 16
LVPECL, CMOS, CML Input and Output Pins ......................................................................................................17

Timing Characteristics ............................................................................................................................................. 19

Transmit Timing .................................................................................................................................................... 19

Outline Diagram....................................................................................................................................................... 21

128-Pin QFP ......................................................................................................................................................... 21

Ordering Information................................................................................................................................................ 22
DS00-375HSPL Replaces DS00-155HSPL to Incorporate the Following Updates................................................. 22

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Description

(continued)

5-8060(F)r.3

Note: Diagram is representative of device functionality and conceptual signal flow. Internal implementation details may be different than shown.

Figure 1. Functional Block Diagram

CK155P

CK155N

16:

1 MU

IPLE

PARITY

D0P

D0N

PHASE/

VCO

PARITY

CHARGE

LFP

LFN

D1P

D1N

D15P

D15N

DIVIDE

CK2G5P
CK2G5N

ENCK2G5

DATA

VALIDP
VALIDN

D2G5P
D2G5N

INVDATN

RESETN

TO DIGITAL LOGIC

TSTCKP
TSTCKN

TESTN

REFCLKP

REFCLKN

PHADJ[1:0]

MANUAL

CLKMODE

INVDAT

TEST

ACQUISITION

LCKLOSSN

EXTADJN

LOAD

MONAPAP

MONAPAN

RREF2

LBDP
LBDN

ENLBDN

VCP VCN

RREF1

PARITYP

PARITYN

CHECK

PHASE

ADJUST

INDICATOR

AUTO

PHASE

ADJUST

FREQ.

DETECTOR

PUMP

BY 16

RETIME

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Pin Information

5-8066(F)r.3

Figure 2. Pin Diagram of 128-Pin QFP (Top View)

100

128

127

126

124

125

123

122

120

121

111

119

118

116

117

115

114

112

113

110

109

107

108

106

105

103

104

102

101

CCD

LCKLOSSN

GND

ENLBDN

CCD

GND

LBDP

LBDN

GND

CCD

RREF1

RREF2

ENCK2G5

CCD

GND

CK2G5N

CK2G5P

GND

D2G5N

D2G5P

GND

CCD

INVDATN

TESTN

CCD

TSTCKN

CCD

TSTCKP

CCD

GND

CCD

GND

D2N

D2P

D3N

D3P

CCD

D4N

D4P

D5N

D5P

GND

D6N

D6P

D7N

D7P

CCD

D8N

D8P

D9N

D9P

GND

D10N

D10P

D11N

D11P

CCD

D12N

D12P

D13N

D13P

GND

D14N

D14P

D15N

D15P

CCD

PARI

CCD

55P

CCD

VAL

I
D

VAL

I
D

CCD

PAN

PHADJ1

PHADJ0

ODE

EXT

ADJN

RESET

GND

CCD

CCA

CCD

VCN

CCA

VCP

CCA

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Pin Information

(continued)

Table 1. Pin Descriptions--2.5 Gbits/s and Related Signals

Note: In Table 1, when operating the TTRN012G7 device at the OC-48/STM-16 rate, 2.5 Gbits/s should be inter-

preted as 2.48832 Gbits/s. When operating the TTRN012G7 device at the RS FEC OC-48/STM-16 rate,
2.5 Gbits/s should be interpreted as 2.66606 Gbits/s. (A similar interpretation should be made for 2.5 GHz.)

* Differential pairs are indicated by P and N suffixes. For nondifferential pins, N at the end of the symbol name designates active-low.
I = input, O = output. I

indicates an internal pull-up resistor on this pin.

Pin

Symbol*

Type

Level

Name/Description

D2G5P

CML

Data Output (2.5 Gbits/s NRZ). 2.5 Gbits/s differential data
output.

D2G5N

LBDP O

CML

Loopback Data Output. Additional 2.5 Gbits/s differential data
output for system loopback.

LBDN

CK2G5P

CML

Clock Output (2.5 GHz). 2.5 GHz differential clock output.

CK2G5N

RREF1

Analog

Resistor Reference 1. CML current bias reference resistor.
(See Table 15, page 18 for values.)

RREF2

Analog

Resistor Reference 2. CML bias reference resistor. Connect a
1.5 k

resistor to V

CCD

ENCK2G5

CMOS

Enable CK2G5P/N Clock Output.
0 = CK2G5P/N buffer powered off
1 or no connection = CK2G5P/N buffer enabled

ENLBDN

CMOS

Enable LBDP/N Data Output (Active-Low).
0 = LBDP/N buffer enabled
1 or no connection = LBDP/N buffer powered off

INVDATN

CMOS

Invert D2G5P/N Data Output (Active-Low).
0 = invert
1 or no connection = noninvert

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Pin Information

(continued)

Table 2. Pin Descriptions--155.52 Mbits/s and Related Signals

Note: In Table 2, when operating the TTRN012G7 device at the OC-48/STM-16 rate, 155 Mbits/s should be inter-

preted as 155.52 Mbits/s. When operating the TTRN012G7 device at the RS FEC OC-48/STM-16 rate,
155 Mbits/s should be interpreted as 166.62 Mbits/s. (A similar interpretation should be made for 155 MHz.)

* Differential pairs are indicated by P and N suffixes. For nondifferential pins, N at the end of the symbol name designates active-low.
I = input, O = output. I

indicates an internal pull-up resistor on this pin.

Pin

Symbol*

Type

Level

Name/Description

D15P

LVPECL

Data Input (155 Mbits/s). 155 Mbits/s differential data input.
D15 is the most significant bit and is transmitted first on the
D2G5P/N output.

D15N

D14P

LVPECL

D14N

D13P

LVPECL

D13N

D12P

LVPECL

D12N

D11P

LVPECL

D11N

D10P

LVPECL

D10N

D9P

LVPECL

D9N

D8P

LVPECL

D8N

D7P

LVPECL

D7N

D6P

LVPECL

D6N

D5P

LVPECL

D5N

D4P

LVPECL

D4N

D3P

LVPECL

D3N

D2P

LVPECL

D2N

D1P

LVPECL

D1N

D0P

LVPECL

D0N

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Pin Information

(continued)

Table 2. Pin Descriptions--155.52 Mbits/s and Related Signals (continued)

* Differential pairs are indicated by P and N suffixes. For nondifferential pins, N at the end of the symbol name designates active-low.
I = input, O = output. I

indicates an internal pull-up resistor on this pin.

Pin

Symbol*

Type

Level

Name/Description

CK155P

LVPECL

Clock Output (155 MHz). 155 MHz differential clock output.

CK155N

43
44

PHADJ1
PHADJ0

CMOS

Phase Adjust. Adjusts phase of CK155P/N in 90 degree steps.

CLKMODE

CMOS

Clock Mode Select. Selects clockless data transfer mode.
0 = clockless transfer
1 or no connection = contra clock

PARITYP

LVPECL

Parity Input over Data (D[15:0]).

PARITYN

VALIDP

LVPECL

Parity Check Output. Validates the input of PARITYP/N.
0 = parity check does not agree with input PARITYP/N pins
1 = parity check agrees

VALIDN

LCKLOSSN

CMOS

Loss of Lock (Active-Low). 0 = PLL out of lock.

EXTADJN

CMOS

External Automatic Phase Adjust (Active-Low). Adjusts the
155 MHz clock output, CK155P/N.
0 = adjust phase of 155 MHz clock to data upon next transition

of the D0P/N input signal

1 = no adjust
Must be held low until the first rising transition of D0P/N.

MONAPAP

LVPECL

Monitor Automatic Phase Adjust. Indicates when a phase
adjustment in the automatic phase adjust block occurs.

MONAPAN

105

REFCLKP

LVPECL

Reference Clock Input (155 MHz). This clock is required.
When applying the REFCLKP/N, set the REFCLKP/N to one of
the following frequencies:

155.52 MHz if using the TRCV012G5, or the TRCV012G7 at
the 0C-48/STM-16 rate of 2.48832 GHz.

166.62 MHz if using the TRCV012G7 at the RS FEC
0C-48/STM-16 rate of 2.66606 GHz.

106

REFCLKN

112

LFP

Analog

Loop Filter PLL. Connect LFP to VCP, and LFN to VCN.

111

LFN

113

VCP

Analog

VCO Control. Connect VCP to LFP, and VCN to LFN.

110

VCN

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Pin Information

(continued)

Table 3. Pin Descriptions--Reset and Test Signals

* Differential pairs are indicated by P and N suffixes. For nondifferential pins, N at the end of the symbol name designates active-low.
I = input, O = output. I

indicates an internal pull-up resistor on this pin.

Table 4. Pin Descriptions--Power and No-Connect Signals

Note: V

CCA

and V

CCD

have the same dc value, which is represented as V

unless otherwise specified. However,

high-frequency filtering is suggested between the individual supplies.

* Differential pairs are indicated by P and N suffixes. For nondifferential pins, N at the end of the symbol name designates active-low.
I = input, O = output. I

indicates an internal pull-up resistor on this pin.

Pin

Symbol*

Type

Level

Name/Description

RESETN

CMOS

Reset (Active-Low). Resets all synchronous logic. During a
reset, the true data outputs are in the low state and the barred
data outputs are in the high state.
0 = reset
1 or no connection = normal operation

TSTCKP

CML

Test Clock Input. Buffer is powered down when TESTN = 1.

TSTCKN

TESTN

CMOS

Test Clock Select (Active-Low).
0 = select test clock
1 or no connection = select internal VCO

Pin

Symbol*

Type

Level

Name/Description

108, 109, 114,

126, 127

CCA

Power

Analog Power Supply (3.3 V).

2, 3, 5, 7, 9,

12, 20, 24, 29,
34, 35, 48, 51,
54, 63, 70, 80,

90, 104, 107

CCD

Power

Digital Power Supply (3.3 V).

1, 4, 13, 16,

19, 25, 28, 31,

32, 37--39,

55, 58, 64, 65,

75, 85, 95,

100--103,

117--124, 128

GND

Ground

Ground.

36, 45, 115,

116, 125

No Connection. Pin 45 has an internal pull-up resistance
of approximately 25 k

. All of these pins must be left open.

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Functional Overview

The Lucent Technologies Microelectronics Group TTRN012G5 operates at the OC-48/STM-16 data rate of
2.5 Gbits/s.* The TTRN012G7 device operates at either 2.5 Gbits/s or the RS FEC OC-48/STM-16 data rate of
2.7 Gbits/s. The device performs the clock synthesis and 16:1 data multiplexing operations required to support
2.5 Gbits/s applications compliant with

Telcordia Technologies

and ITU standards. Parallel 155 Mbits/s data is

clocked into an input register and checked for valid parity. Both clockless data transfer and contra-directional clock-
ing modes are supported. The data is then multiplexed into a 2.5 Gbits/s serial stream and output buffered for inter-
facing to a laser driver. A 2.5 GHz clock is synthesized from a reference clock and is used to retime the serial data.
The 2.5 GHz clock is optionally available as an output. The serial data stream polarity can be inverted under pin
control to make interfacing easier.

Clock Synthesizer Operation

The clock synthesizer uses a PLL to synthesize a 2.5 GHz clock from a reference frequency. A 155 MHz clock
derived from the 2.5 GHz synthesized clock may be used to clock in the parallel data.

Clock Synthesizer Loop Filter

A typical loop filter that provides adequate damping for less than 0.1 dB of jitter peaking is shown in Figure 3. Con-
nect the filter components and also connect LFP to VCP and connect LFN to VCN. The component values can be
varied to adjust the loop dynamic response (see Table 5).

Table 5. Clock Synthesizer Loop Filter Component Values

* Capacitor C1 should be either ceramic or nonpolar.

5-8061(F)

Figure 3. Clock Synthesizer Loop Filter Components

Clock Synthesizer Settling Time

The clock synthesizer will acquire phase/frequency lock after a valid reference clock is applied to the REFCLKP/N
input pins. The actual time to acquire lock is a function of the loop bandwidth selected. The loop will acquire lock
within 5 ms when using the external loop bandwidth components corresponding to 2 MHz.

Loss of Lock Indicator (LCKLOSSN)

The LCKLOSSN pin indicates (active-low) when the clock synthesizer has exceeded phase-lock limits with the
incoming REFCLKP/N phase. The lock detect function compares the phases of the input 155 MHz clock at the
REFCLKP/N pins with the internally generated 155 MHz output clock at the CK155P/N pins. When the phase dif-
ference in the two signals is close to zero as determined by a second internal phase detector and filter, the lock
detect signal LCKLOSSN is set to the logic high state. When the phase difference between the two signals is
changing with time at a rate exceeding the filter's cutoff frequency, the device is declared out of lock and lock
detect signal LCKLOSSN is set to a logic low. If a set of highly damped phase-locked loop parameters is chosen
for the device, LCKLOSSN may exhibit more than one positive edge transition during the acquisition process
before a steady logic high state is achieved.

* The OC-48/STM-16 data rate of 2.48832 Gbits/s is typically approximated as 2.5 Gbits/s in this document when referring to the application

rate. The RS FEC OC-48/STM-16 data rate is 2.66606 Gbits/s and is approximated as 2.7 Gbits/s in this document. Similarly, the OC-3/
STM-1 data rate of 155.52 Mbits/s is typically approximated as 155 Mbits/s, and the RS FEC OC-3/STM-1 data rate of 166.62 Mbits/s is
approximated as 166 Mbits/s. The exact frequencies are used only when necessary for clarity.

Components

Values for 2 MHz Loop Bandwidth

C1*

0.10

F ± 10%

C2, C3

10 pF ± 20%

680

± 5%

LFN/VCN

LFP/VCP

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Functional Overview

(continued)

Clock Synthesizer Operation

(continued)

Clock Synthesizer Generated Jitter

The clock synthesizer's generated jitter performance meets the requirements shown in Table 6. These specifica-
tions apply to the jitter generated at the 2.5 GHz clock pins (CK2G5P/N) when the jitter on the reference clock
(REFCLKP/N) is within the specifications given in Table 9 on page 16, and the loop filter components are chosen to
provide a loop bandwidth of 2 MHz.

Table 6. Clock Synthesizer Generated Jitter Specifications

* This denotes the device specification for system SONET/SDH compliance when the loop filter in

Table 5 and Figure 3 is used.

Clock Synthesizer Jitter Transfer

The clock synthesizer's jitter transfer performance meets the requirement shown in Figure 4 when the loop filter
values shown in Table 5 are used.

5-8062(F)r.1

Figure 4. Clock Synthesizer Jitter Transfer

Parameter

Typical

Max

(Device)*

Unit

Generated Jitter (p-p):

Measured with 12 kHz to 20 MHz Bandpass
Filter

0.02

0.09

UIp-p

Generated Jitter (rms):

Measured with 12 kHz to 20 MHz Bandpass
Filter

0.002

0.009

UIrms

10k

100k

10M

100M

FREQUENCY (Hz)

TTE

R OUT

/
J

I
T

(dB

)

(2 MHz, 0.1 dB)

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Functional Overview

(continued)

Multiplexer Operation

The parallel 155 Mbits/s data is clocked into an input buffer by a 155 MHz clock derived from the synthesized
2.5 GHz clock. The data is checked for parity and then clocked into a 16:1 multiplexer. The relationship between
the parallel D[15:0] input data and the serial output data (D2G5P/N) is given in Figure 5. The D15 bit is the most
significant bit (MSB) and is shifted out first in time in the serial output stream.

5-8063(F)

Figure 5. Parallel Input to Serial Output Data Relationship

High-Speed Serial Clock Output Enable (ENCK2G5)

A separate output enable is provided for the 2.5 GHz clock output (CK2G5P/N). The enable is an active-high
CMOS input with an internal pull-up resistor. The default condition will enable the CK2G5P/N output, and applying
a ground or setting the enable pin (ENCK2G5) to logic low will disable the CK2G5P/N output. When disabled, the
CK2G5P/N output pins should be either left floating, or be connected to a load which returns to V

. The output

must not be connected directly to ground when it is disabled.

Loopback 2.5 GHz Data Output (LBDP/N, ENLBDN)

An alternate 2.5 Gbits/s CML data output is available on the LBDP/N pin. This pin is provided for use in system
loopback testing and avoids the need for off-chip signal splitting of the data signal path. The alternate
2.5 Gbits/s loopback data output may be enabled by setting the ENLBDN pin to logic low. ENLBDN enable is an
active-low CMOS input with an internal pull-up resistor so the default condition will disable the LBDP/N output, and
a ground or logic-low signal must be applied to enable the loopback output. When disabled, the LBDP/N pin should
be either left floating, or be connected to a load which returns to V

. The output must not be connected directly to

ground when it is disabled.

Parity Validation (VALIDP/N)

The parity signal is expected to be a logic 0 when the number of 1s in the 16-bit input register is an even number,
and the parity signal is expected to be a logic 1 when the number of 1s in the input register is an odd number. If the
parity bit agrees with the parity in the input register, then the VALIDP/N signal will be logic high. If the parity signal
is not generated, the VALIDP/N pin should be left open without termination to avoid meaningless signal swings and
avoid unnecessary power dissipation.

D15

D14

D15

TIME

(D15 SERIALLY SHIFTED OUT FIRST)

(D0 SERIALLY SHIFTED OUT LAST)

(MSB)

(LSB)

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Clocking Modes and Timing Adjustments

Clockless Transfer Mode

(CLKMODE, EXTADJN, MONAPAP/N)

The device supports two timing modes for the 155 Mbits/s data input. In clockless transfer mode (CLKMODE = 0),
data may be sent to the device without a clock. After phase/frequency lock has been obtained by the clock
synthesizer, the device automatically finds the correct phase of the internal 155 MHz clock by sampling the rising
edge of the D0P/N data bit. The skew of any data bit D[15:0]P/N must be less than 500 ps relative to D0P/N. If the
phase of the incoming data shifts more than ±2400 ps from the time the automatic phase adjustment occurred, the
device will automatically readjust its internal clocking phase. Data integrity may not be obtained at the instant of
phase adjustment, and an error burst of up to 16 data bits may occur.

The user may optionally force the automatic phase adjustment to occur by toggling the EXTADJN pin (active-low)
and keeping it low for at least 12.8 ns after the next rising edge of the D0P/N input. The phase will be adjusted one
time upon the first occurrence of a low-to-high transition of the D0P/N data bit while the EXTADJN pin is in the
logic-low state. To externally adjust the phase again, the RESETN pin must be brought low then high to enable
another phase adjustment. When CLKMODE = 0, the 155 MHz output clock (CK155P/N) is active but should be
left unconnected to conserve power.

MONAPAP/N can be used for the monitoring and reporting of phase adjustments. The MONAPAP/N output will go
high in the following sequence:

EXTADJN pin transitions to logic-low state

A rising edge of the D0P/N input occurs

MONAPAP/N transitions to logic 1 three CK2G5 cycles (1.2 ns) later

MONAPAP/N will stay high for 12 CK2G5 cycles (4.8 ns)

The first sixteen D2G5 data output bits after the rising edge of MONAPAP/N are invalid.

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Clocking Modes and Timing Adjustments

(continued)

Contra-Directional Clocking Mode

(CLKMODE, PHADJ[1:0])

In the contra-directional clocking mode (CLKMODE = 1), the data is sampled with the internal 2.5 GHz clock at the
time of the falling edge of CK155P (see Figure 8 on page 19 for timing details). The device sends a 155 MHz clock
with one of four user-selectable phases out to the upstream device for clocking the data toward the device. The
user can program PHADJ[1:0] to adjust the phase of CK155 as a function of PWB layout and upstream device
propagation delay in order to meet the setup and hold time of the 155 Mbits/s data to the device. With a
PHADJ[1:0] = [11], the data is sampled by the internal CK2G5 clock at the falling edge of CK155P. PHADJ[1:0]
changes the phase of the CK155P clock without changing the input data sampling time. PHADJ[1:0] setting infor-
mation is given in Table 7, and the phase relationship of CK155 for each PHADJ[1:0] setting is shown in Figure 6.

Table 7. PHADJ Settings for CK155 Output Clock (Contra-Clocking Mode)

5-8064(F)r.2

Figure 6. CK155 Phase Relation vs. PHADJ Setting

Input Pins

Phase

PHADJ1

PHADJ0

(See part A of Figure 6.)

(See part B of Figure 6.)

(See part C of Figure 6.)

(See part D of Figure 6.)

A. (0 DEG.)

B. (90 DEG.)

C. (180 DEG.)

D. (270 DEG.)

TIME

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

CML Output Structure (Used on Pins D2G5P/N, CK2G5P/N)

The CML architecture is essentially a current-steering mechanism combined with an amplifier. This makes the out-
put swing of the signal a function of the termination resistor and the programmable output current. The user should
connect external termination resistors from the CML output pins to V

. The on-chip, 100

pull-up resistors pro-

vide a dc path when using an ac-coupled load.

The voltage swing of a CML signal is typically 400 mV, half that of ECL/PECL. The lower pulse amplitude reduces
noise transients, crosstalk, and EMI. It also uses half the amount of current through the termination resistors. The
schematic of a typical CML output structure is shown in Figure 7.

5-8065(F)r.2

Figure 7. Typical CML Output Structure

Choosing the Value of the External CML Reference Resistors (RREF1, RREF2)

The flexibility of the CML interface permits certain parameters to be customized for a particular application. The
RREF1 resistor controls the CML output driver current source. Adjusting this tail

current and termination resistors

will allow signal amplitude control (see the CML output specifications for limitations, page 18 and page 20) and
flexibility in termination schemes.

With RREF2 set to 1.5 k

, the equation for the CML output current is the following:

Iout = (18)*(1.21)/RREF1

The CML outputs have on-chip 100

load resistors to V

to accommodate capacitive ac coupling. With a 50

1% load, the effective load resistance will be 33.33

± 6%. For a 400 mV voltage swing into the 50

load, set

RREF1 to 1.8 k

. For a 600 mV voltage swing, set RREF1 to 1.2 k

. In both cases, RREF2 remains fixed at a

value of 1.5 k

DEVICE-INTERNAL CML OUTPUT BUFFER CIRCUIT

EXTERNAL OUTPUT TERMINATION

100

VREF

18X

RREF1

RREF2

OUT

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in
excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.

Handling Precautions

Although protection circuitry has been designed into this device, proper precautions should be taken to avoid
exposure to electrostatic discharge (ESD) during handling and mounting. Lucent employs a human-body model
(HBM) and charged-device model (CDM) for ESD-susceptibility testing and protection design evaluation. ESD
voltage thresholds are dependent on the circuit parameters used in the defined model. No industrywide standard
has been adopted for the CDM. However, a standard HBM (resistance = 1500

, capacitance = 100 pF) is widely

used and, therefore, can be used for comparison purposes:

Operating Conditions

Table 8. Recommended Operating Conditions

Parameter

Min

Max

Unit

Power Supply Voltage (V

)

4.0

Storage Temperature

125

°C

Pin Voltage

GND 0.5

+ 0.5

Device

Voltage

TTRN012G5

200 V

TTRN012G7

200 V

Parameter

Symbol

Min

Typ

Max

Unit

Power Supply (dc voltage)

3.135

3.3

3.465

Ground

Input Voltage:

Low
High

See Table 10,

Table 12,
Table 14.

See Table 10,

Table 12,
Table 14.

See Table 10,

Table 12,
Table 14.

V
V

Temperature:

Ambient

°C

Power Dissipation:

MBIC 025 BiCMOS
MBIC 025 SiGe BiCMOS

--
--

1.5
0.9

TBD

1.14

W
W

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Electrical Characteristics

Reference Frequency (REFCLKP/N) Specifications

The device requires a differential LVPECL reference clock input.

When using the TTRN012G5 device, a 155.52 MHz differential LVPECL clock must be applied to the
REFCLKP/N input.

When using the TTRN012G7 device at the OC-48/STM-16 rate, a 155.52 MHz differential LVPECL clock must
be applied to the REFCLKP/N input.

When using the TTRN012G7 device at the RS FEC OC-48/STM-16 rate, a 166.62 MHz differential LVPECL
clock must be applied to the REFCLKP/N input.

Table 9 provides the characteristics of the REFCLKP/N input.

Table 9. Reference Frequency Characteristics

* Includes effects of power supply variation, temperature, electrical loading, and aging. The ±20 ppm tolerance is

required to meet SONET/SDH requirements. For non-SONET/SDH compliant systems, looser tolerances may apply.

Measured under one 3.3 V LVPECL load. Includes frequency components up to 2 MHz.
Specified range is to be compatible with environmental specification of TTRN012G5 or TTRN012G7. Applications

requiring a reduced temperature range may specify the reference frequency oscillator accordingly.

Parameter

Min

Typ

Max

Unit

Reference Frequency (REFCLKP/N)

155.52

MHz

166.62

MHz

Reference Frequency Tolerance*

ppm

Duty Cycle

Phase Jitter

ps(rms)

Temperature

°C

Supply Voltage

3.10

3.60

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Electrical Characteristics

(continued)

LVPECL, CMOS, CML Input and Output Pins

Notes:

1. For Table 10 through Table 17, V

= 3.3 V ± 5%, T

= 40 °C to +85 °C; these tables apply to both MBIC 025

BiCMOS and MBIC 025 SiGe BiCMOS technologies.

2. For more information on interpreting CML specifications, see the CML Output Structure (Used on Pins

D2G5P/N, CK2G5P/N) section on page 14.

Table 10. LVPECL Input Pin Characteristics

Table 11. LVPECL Output Pin Characteristics

Table 12. CMOS Input Pin Characteristics

Table 13. CMOS Output Pin Characteristics

Applicable

Pins

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

D[15:0]P/N,

PARITYP/N,

REFCLKP/N

Input Voltage High

Referred to V

1165

880

Input Voltage Low

Referred to V

1810

1475

Input Current High Leakage

= V

(max)

Input Current Low Leakage

= V

(min)

Applicable

Pins

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

CK155P/N,

VALIDP/N,

MONAPAP/N

Output Voltage High

Load = 50

connected to

2.0 V

1.31

1.20

0.90

Output Voltage Low

Load = 50

connected to

2.0 V

1.95

1.88

1.80

Applicable

Pins

Symbol

Parameter

Conditions

Min

Max

Unit

RESETN,

PHADJ[1:0],

EXTADJN,

INVDATN,

TESTN,

CLKMODE,

ENCK2G5,

ENLBDN

Input Voltage High

1.0

Input Voltage Low

GND

1.0

Input Current High Leakage

= V

Input Current Low Leakage

= GND

225

Applicable

Pins

Symbol

Parameter

Conditions

Min

Max

Unit

LCKLOSSN

Output Voltage High

= 4.0 mA

0.5

Output Voltage Low

= 4.0 mA

GND

0.5

Output Load Capacitance

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Electrical Characteristics

(continued)

LVPECL, CMOS, CML Input and Output Pins

(continued)

Table 14. CML Input Pin dc Characteristics

Table 15. CML Output Pin dc Characteristics

* Applies when RREF1 = 1 k

Applies when RREF1 = 1.8 k

Applies when RREF1 = 6 k

Applicable

Pins

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TSTCKP/N

Input Voltage Low

0.4

Input Voltage High

Applicable

Pins

Symbol

Parameter

Conditions

Min*

Typ

Max

Unit

D2G5P/N,

LBDP/N,

CK2G5P/N

Output Voltage Low

RREF2 = 1.5 k

= 50

All signals

differential

1.2

0.4

Output Voltage High

+ 0.3

Output Current Low

3.6

Output Current High

Preliminary Data Sheet

TTRN012G5 and TTRN012G7

August 2000

Clock Synthesizer, 16:1 Data Multiplexer

Lucent Technologies Inc.

Timing Characteristics

Transmit Timing

Figure 8 shows the timing relationships between the 155.52 MHz or 166.62 MHz output clock (CK155P/N) and the
155.52 Mbits/s or 166.62 Mbits/s input data (D[15:0]P/N) and the input parity valid check (PARITYP/N). Also
shown is the relationship of the VALIDP/N output signal to CK155P/N; this relationship is true for both the contra-
clocking mode and the clockless transfer mode.

5-7726(F).hr.2

Note: T

and T

HOLD

only apply in contra-clocking mode when CLKMODE = 1.

Figure 8. Transmit Timing Waveform

The 155 MHz or 166 MHz output clock and data signals from Figure 8 are characterized in Table 16.

Table 16. LVPECL Input/Output Pin ac Timing Characteristics

Applicable

Pins

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

CK155P/N

Duty Cycle

All signals

differential

PERIOD

155.52 MHz Clock Period

6.43

166.62 MHz Clock Period

6.00

Input Timing

D[15:0]P/N,

PARITYP/N,

CK155P/N

Setup from Clock Edge to

D[15:0]P/N or to
PARITYP/N Edge

CLKMODE = 1, All

signals differential

2.0

HOLD

Hold from Clock Edge to

D[15:0]P/N or to
PARITYP/N Edge

CLKMODE = 1,

All signals

differential

0.5

RISE

FALL

Rise, Fall Times:

20%--80%

All signals

differential

200

500

800

SKEW

Transition Skew Rise to Fall

100

Output Timing

VALIDP/N,
CK155P/N

Time Delay from Clock Edge

to VALIDP/N Edge

All signals

differential

300

800

1500

RISE

FALL

Rise, Fall Times:

20%--80%

200

500

800

SKEW

Transition Skew Rise to Fall

100

OUTPUT

CK155P

CK155N

INPUTS

D[15:0]P/N,

PARITYP/N

DATA 1

PERIOD

DATA 2

HOLD

OUTPUT

VALIDP/N

VALID 1

VALID 2

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc.

Timing Characteristics

(continued)

Transmit Timing

(continued)

Figure 9 shows the timing relationship between the 2.5 GHz or 2.7 GHz output clock (CK2G5P/N) and the
2.5 Gbits/s or 2.7 Gbits/s output data (D2G5P/N).

5-7726(F).er.4

Figure 9. Transmit Timing Waveform with 2.5 GHz or 2.7 GHz Clock

The 2.5 GHz or 2.7 GHz output clock and data signals from Figure 9 are characterized in Table 17.

Table 17. CML Output Pin ac Timing Characteristics

Applicable

Pins

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

CK2G5P/N

Duty Cycle

RREF1 = 1.8 k

RREF2 = 1.5 k

= 50

All signals

differential

PERIOD

2.48832 GHz Clock Period

402

2.66606 GHz Clock Period

375

D2G5P/N,

CK2G5P/N,

LBDP/N

Time Delay from Clock Edge

to Data Edge

151

201

251

RISE

FALL

Rise, Fall Times:

20%--80%

120

SKEW

Transition Skew Rise to Fall

OUTPUT

CK2G5P

CK2G5N

OUTPUT

D2G5P/N

DATA 1

PERIOD

DATA 2

DATA 3

TTRN012G5 and TTRN012G7

Preliminary Data Sheet

Clock Synthesizer, 16:1 Data Multiplexer

August 2000

Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.

August 2000
DS00-375HSPL (Replaces DS00-155HSPL)

For additional information, contact your Microelectronics Group Account Manager or the following:
INTERNET:

http://www.lucent.com/micro

E-MAIL:

docmaster@micro.lucent.com

N. AMERICA:

Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)

ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256

Tel. (65) 778 8833, FAX (65) 777 7495

CHINA:

Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road, Shanghai
200233 P. R. China Tel. (86) 21 6440 0468, ext. 325, FAX (86) 21 6440 0652

JAPAN:

Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700

EUROPE:

Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148
Technical Inquiries: GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot),

FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 3507670 (Helsinki),
ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 1 807 1441 (Madrid)

Ordering Information

DS00-375HSPL Replaces DS00-155HSPL to Incorporate the Following Updates

1. Added a second technology, MBIC 025 SiGe BiCMOS, to the data sheet.

2. Page 7, REFCLKP/N pins, corrected definition.

3. Page 15, Absolute Maximum Ratings, added maximum power supply value of 4.0 V.

4. Page 15, Handling Precautions, corrected ESD threshold value from TBD to

200 V.

5. Page 15, Table 8, added MBIC 025 SiGe BiCMOS power dissipation values.

6. Page 17, Table 11, updated LVPECL Output Pin Characteristics.

7. Page 22, Ordering Information, added MBIC 025 SiGe BiCMOS comcodes.

Device Code

Package

Temperature

Comcode

(Ordering Number)

TTRN012G5:

TTRN012G5 (BiCMOS)
TTRN012G53XE1 (SiGe BiCMOS)

128-pin QFP
128-pin QFP

40 °C to +85 °C
40 °C to +85 °C

108419961
108700709

TTRN012G7:

TTRN012G7 (BiCMOS)
TTRN012G73XE1 (SiGe BiCMOS)

128-pin QFP
128-pin QFP

40 °C to +85 °C
40 °C to +85 °C

108560335
108700717

Part Number TTRN012G5

Document Outline