_______________General Description
The MAX3270 is a complete Clock Recovery and Data
Retiming IC for 155Mbps and 622Mbps SDH/SONET
and ATM applications. The MAX3270 meets Bellcore
and CCITT jitter tolerance specifications ensuring error-
free data recovery. Recovered clock and data are
phase aligned using a fully integrated phase-locked
loop (PLL). An output frequency monitor (FM) is includ-
ed to detect loss of PLL acquisition or a loss of input
data.
The MAX3270 has differential ECL input and output
interfaces, so it is less susceptible to noise in a high-
frequency environment. The fully integrated PLL
includes an integrated phase-frequency detector that
eliminates the need for external references.
________________________Applications
155Mbps (STM-1/OC-3)/622Mbps (STM-4/
OC-12) SDH/SONET Transmission Systems
155Mbps/622Mbps ATM/SONET Access Nodes
Add/Drop Multiplexers
Cross-Connects
____________________________Features
o
Supports Both 155Mbps and 622Mbps Clock
Recovery and Data Retiming
o
Fully Integrated Phase/Frequency Detector
o
Capable of Switching to an External Clock
o
Differential 100K ECL Data and Clock I/Os
o
Output Monitor Provides Lock Detection
o
No External Reference Clock Required
Pin Configuration appears at end of data sheet.
MAX3270
155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector
________________________________________________________________
Maxim Integrated Products
1
MAX3270
50
50
50
50
50
450
11
+5V
3
4
41
42
13
18
20
14
17
2
19
38
39
VTTL
SDIP
RCON
CRP
FILP
FILG
FILN
FM
RCOP
RDOP
RDON
26
25
31
30
2.2
µ
F
20
-4.5V
2.2
µ
F
20
28
9
8
10
6
SDIN
PHADJ
-2V
-2V
-2V
EXCS AND CRS ARE CONNECTED FOR
622Mbps OPERATION.
BYPASS SUPPLIES WITH 0.1
µ
F AND 0.01
µ
F CAPACITORS.
DECOUPLE AVEE1, AVEE2, AND GVEE SUPPLY PINS.
50
50
DVCC
DVCC
AVEE1
AVEE2
GVEE
DVEE
DVEE
DVEE
DVEE
DVEE
DVCC
DVCC
AVCC
AVCC
AVCC
AVCC
OVCC
OVCC
OVCC
OVCC
16
15
5
7
27
29
32
-2V
+5V
24
VR
EXCS
CRS
RST
EXC
12
-4.5V
-4.5V
-4.5V
-4.5V
DIGITAL
SUPPLY
ANALOG SUPPLY
1
35
36 22 21 34
___________________________________________________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
19-0379; Rev 0; 3/95
PART
MAX3270EMH
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
44 MQFP
______________Ordering Information
MAX3270
155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
EE
= -4.5V ±5%, VTTL = 5V ±5%, T
A
= -40°C to +85°C, unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltages
VTTL to GND .....................................................-0.5V to +8.0V
V
CC
to GND .......................................................-0.5V to +8.0V
V
EE
to GND........................................................-8.0V to +0.5V
SDIP, SDIN, EXC ...................................................-8.0V to +0.5V
RDOP, RDON, RCOP, RCON, CRP.......................-8.0V to +0.5V
EXCS, RST, CRS....................................................-0.5V to +8.0V
FILP, FILG, FILN ....................................................-8.0V to +0.5V
PHADJ, VR ............................................................-8.0V to +8.0V
FM .........................................................................-8.0V to +8.0V
Input Differential Voltage Level, SDIP, SDIN ......................+3.0V
Continuous Power Dissipation (T
A
= +85°C) .......................1.3W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
VR = PHADJ = 0, T
A
= +25°C
VTTL = 5.00V, VIN = 0.8V
VTTL = 5.00V, VIN = 2V
Loaded with 50
to -2V
Loaded with 470
to V
EE
Loaded with 470
to V
EE
V
IN
= V
OL
(typ)
V
IN
= V
OH
(typ)
Loaded with 50
to -2V
CONDITIONS
µA
0
10
I
BIAS
Input Bias Current
µA
0
40
I
IL
Input Low Current
µA
0
40
I
IH
Input High Current
V
0.8
V
IL
Input Low Voltage
V
2
V
IH
Input High Voltage
mV
-1830
-1705
-1620
V
OL
Output Low Voltage
mV
-1025
-955
-870
V
OH
Output High Voltage
mV
-1830
-1705
-1550
V
OL
Output Low Voltage
mA
2.4
5
I
TTL
Static Supply Current from VTTL
V
-4.725
-4.50
-4.275
V
EE
V
4.75
5.00
5.25
V
TTL
Positive Voltage Supply
(with respect to ground)
Negative Voltage Supply
(with respect to ground)
mV
-1025
-955
-870
V
OH
Output High Voltage
nA
-100
100
I
IL
Input Low Current
µA
0
100
I
IH
Input High Current
mA
150
210
I
VEE
Static Supply Current from V
EE
mV
-1165
-870
V
IH
Input High Voltage
mV
-1830
-1475
V
IL
Input Low Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
PHASE ADJUST INPUTS: PHADJ, VR
TTL INPUTS: CRS, RST, EXCS
LOW-POWER ECL OUTPUT: CRP
ECL OUTPUTS: RCOP, RCON, RDOP, RDON
ECL INPUTS: EXC, SDIP, SDIN
MAX3270
155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector
_______________________________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS (continued)
(V
EE
= -4.5V, VTTL = 5V, T
A
= 25°C, unless otherwise noted.)
PHADJ = 0
Loaded with 50
to -2V and
5pF to GND
FILP and FILN shorted
FILP - FILN = 1.6V
FILP - FILN = 1.6V
FILP and FILN open
FILP and FILN shorted,
PFD = neutral state
ft = 622.08MHz
CONDITIONS
rad/V
2
K
PHADJ
Phase Offset Sensitivity,
/
PHADJ
mA/V
1.25
Gm
Transconduction Gain of Filter Amplifier
mV/rad
192
KD
Phase-Detector Gain
MHz/V
75
K
O
Incremental Tuning Sensitivity
(Incremental Slope,
f/
Vt)
MHz
622.08
F
O
Frequency of VCO
V/V
0.95
1.05
GFM
Gain of the Monitor Amplifier
ps
600
t
r
, t
f
Transition Time 20% to 80%
kHz/V
550
K
OV
Frequency Sensitivity to
Power-Supply Voltage
MHz/V
3.75
6
K
O
Mean Frequency Sensitivity
MHz
6
10
DF
O
Frequency Range
dB
21
26
GOL
Filter Amplifier Open-Loop Voltage Gain
MHz
38.00
39.50
F
O
Center Frequency
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
175
180
185
190
150
-40
80
V
EE
SUPPLY CURRENT
vs. TEMPERATURE
155
170
MAX3270-TOC9
TEMPERATURE (°C)
V
EE
SUPPLY CURRENT (mA)
0
40
60
100
-20
20
165
160
-4.75V
-4.5V
-4.25V
__________________________________________Typical Operating Characteristics
PHADJ = 0, FILP and FILN shorted
mV
-35
35
V
O
Output Offset Voltage of the
Monitor Amplifier
Loaded with 50
to -2V and
5pF to GND
ps
100
TD
Time Difference between RDO and RCO
ECL OUTPUTS: RDOP, RDON, RCOP, RCON
VCO TEST PARAMETERS; CPR OUTPUT
PLL ELECTRICAL SPECIFICATIONS
PFD AND FILTER AMPLIFIER TEST LEVELS
38.8
38.9
39.0
38.3
0
60
80
100
CRP FREE-RUNNING FREQUENCY (VCO/16)
vs. DIE TEMPERATURE
38.4
38.7
MAX3270-TOC5
TEMPERATURE (°C)
FREQUENCY (MHz)
20
40 50
70
90
10
30
38.6
38.5
MEASURED
MAX3270
155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
0.1
10
1k
10k
100k
1M
JITTER TOLERANCE
(155Mbps, 2
23
-1 PRBS)
1.0
10.0
MAX3270-TOC1
FREQUENCY (Hz)
AMPLITUDE (UI p-p)
100
DATA
BELLCORE
MASK
0.1
10
1k
10k
100k
1M
JITTER TOLERANCE
(622Mbps, 2
23
-1 PRBS)
1.0
10.0
MAX3270-TOC2
FREQUENCY (Hz)
AMPLITUDE (UI p-p)
100
DATA
BELLCORE
MASK
MAX3270
155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector
_______________________________________________________________________________________
5
155Mbps RECOVERED CLOCK AND
RETIMED DATA (SINGLE ENDED)
DATA
CLOCK
2ns/div
622Mbps RECOVERED CLOCK AND
RETIMED DATA (SINGLE ENDED)
DATA
CLOCK
500ps/div
RECOVERED CLOCK JITTER
(155Mbps, 1-0 PATTERN, 4.7ps RMS)
Mean 40.65ns
RMS
4.7ps
PkPk 38.4ps
µ
±1
69.674%
µ
±2
95.558%
µ
±3
99.698%
10ps/div
R
F
= 20
C
F
= 2.2
µ
F
RECOVERED CLOCK JITTER
(155Mbps, 2
7
-1 PRBS, 5.1ps RMS)
Mean 40.61ns
RMS
5.13ps
PkPk 45.6ps
µ
±1
68.961%
µ
±2
95.844%
µ
±3
99.717%
10ps/div
R
F
= 20
C
F
= 2.2
µ
F
RECOVERED CLOCK JITTER
(622Mbps 2
7
-1 PRBS 9.0ps RMS)
Mean 38.68ns
RMS
9.049ps
PkPk 79.4ps
µ
±1
69.747%
µ
±2
95.453%
µ
±3
99.582%
10ps/div
R
F
= 20
C
F
= 2.2
µ
F
__________________________________________Typical Operating Characteristics
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