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Part Number MAX3774

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General Description
The MAX3772­MAX3775 are dual-rate (1.0625Gbps
and 2.125Gbps) fibre channel repeaters. They are opti-
mized for use in fibre channel arbitrated loop applica-
tions and operate from a +3.3V supply. The
MAX3772­MAX3775 exceed fibre channel jitter toler-
ance requirements and can recover data signals with
up to 0.7 unit interval (UI) jitter. The circuit's fully inte-
grated phase-locked loop (PLL) provides a frequency
lock indication and does not need an external reference
clock. These repeaters provide low-jitter CML clock and
data outputs, and are pin compatible with the MAX3770
repeater (except RATESEL pin and exposed paddle).
The MAX3773/MAX3774 can also be used for imped-
ance transformation between 100
(differential) and
150
(differential) systems. To reduce the number of
external components, all signal inputs and outputs are
internally terminated. The MAX3772­MAX3775 are
available in 16-pin QSOP-EP packages.
Applications
1.0625Gbps/2.125Gbps Dual-Rate
Fibre Channel
Fibre Channel Data Storage Systems
Storage Area Networks
Fibre Channel Hubs
100
/150 (Differential) Impedance
Transformation
Features
o Pin Selectable 1.0625Gbps/2.125Gbps Dual-Rate
Fibre Channel Operation
o Exceeds Fibre Channel Jitter Tolerance
Requirements
o 1400mV Differential Output Swing
o +3.0V to +3.6V Operation
o No Reference Clock Required
o Frequency Lock Indication
o 290mW Power Consumption (MAX3775) at +3.3V
o 100/150 (differential) Input/Output
Terminations
MAX3772­MAX3775
Dual-Rate Fibre Channel Repeaters
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
3.3V
Z
o
= 75
PORT BYPASS CIRCUIT
FIBRE CHANNEL REPEATER
Z
o
= 75
MAX3775
CLK+
CLK-
GND
RATESEL
CLKEN
V
CC
0.047
µF
0.1
µF
OUT+
OUT-
IN+
IN-
CF-
CF+
LOCK
3.3V
MAX3750
GND
SEL
V
CC
GND
SEL
V
CC
0.1
µF
OUT+
OUT-
IN+
IN-
LIN+
LIN-
LOUT-
LOUT+
LIN+
LIN-
LOUT-
LOUT+
PORT BYPASS CIRCUIT
3.3V
MAX3750
0.1
µF
OUT+
OUT-
IN+
IN-
Z
o
= 75
Z
o
= 75
Typical Operating Circuits
19-2192; Rev 0; 10/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Pin Configuration appears at end of data sheet.
Selector Guide appears at end of data sheet.
PART
TEMP. RANGE
PIN-PACKAGE
MAX3772CEE
0°C to +70°C
16 QSOP-EP
MAX3773CEE
0°C to +70°C
16 QSOP-EP
MAX3774CEE
0°C to +70°C
16 QSOP-EP
MAX3775CEE
0°C to +70°C
16 QSOP-EP
MAX3772­MAX3775
Dual-Rate Fibre Channel Repeaters
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, 8B/10B data coding, C
F
= 0.047µF, lock pin loaded with
15k resistor, all high-speed inputs and outputs
AC-coupled, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
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.
V
CC
........................................................................-0.5V to +5.0V
Pin Voltage Levels (IN±, CF±,
RATESEL, CLKEN, LOCK) .....................-0.5V to (V
CC
+ 0.5V)
Current into LOCK...............................................-1mA to +10mA
CML Output Currents (OUT±, CLK±), R
OUT
= 75
........ +22mA
CML Output Currents (OUT±, CLK±), R
OUT
= 50
........ +33mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP-EP (derate 18.9mW/°C above +70°C) ...702mW
Operating Junction Temperature Range ...........-55°C to +150°C
Operating Temperature Range .........................-55°C to +110°C
Storage Temperature Range ............................-55°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX3772/MAX3773
80
101
140
CLKEN = GND
MAX3774/MAX3775
68
88
124
MAX3772/MAX3773
115
146
195
Supply Current (Note 1)
CLKEN = V
CC
MAX3774/MAX3775
95
121
164
mA
MAX3772/MAX3773,
100
terminated
1000
1400
1800
Differential Voltage Signal
at OUT
+
Figure 1
MAX3774/MAX3775,
150
terminated
1000
1400
1800
mVp-p
MAX3772/MAX3773
100
terminated
1000
1400
1800
Differential Voltage Signal
at CLK
+
Figure 1
MAX3774/MAX3775,
150
terminated
1000
1400
1800
mVp-p
1.0625Gbps operation, RATESEL = GND
-100
+100
Input Data Rate Range
2.125Gbps operation, RATESEL = V
CC
-100
+100
ppm
20% to 80% 1.0625Gbps operation
136
325
Input Edge Speed
20% to 80% 2.125Gbps operation
75
160
ps
Data Transition Time (OUT±)
20% to 80% (Note 2)
100
130
175
ps
Clock Transition Time (CLK±)
20% to 80% (Note 2)
50
75
100
ps
LOCK Output Low
I
OL
= +250µA (sinking)
0.4
V
LOCK Output High
I
OH
= -100µA (sourcing)
2.4
V
CLKEN, RATESEL Input Current
-50
50
µA
CLKEN, RATESEL Input Low
-0.3
0.8
V
CLKEN, RATESEL Input High
2
V
CC
+ 0.3
V
Differential Input Voltage Swing
200
2200
mVp-p
Input Common-Mode Voltage
V
CC
-
0.45
V
Differential Voltage across CF
+
(Note
2)
V
CC
V
CDR Lock Time
Input = CJTPAT (Note 3)
500
µs
MAX3772­MAX3775
Dual-Rate Fibre Channel Repeaters
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, 8B/10B data coding, C
F
= 0.047µF, lock pin loaded with
15k resistor, all high-speed inputs and outputs
AC-coupled, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX3772/MAX3774
78
100
122
Differential Input Resistance
(IN
+
)
MAX3773/MAX3775
118
150
182
MAX3772/MAX3773
78
100
122
Differential Output Resistance
(OUT
+ , CLK
+
)
MAX3774/MAX3775
118
150
182
10Hz
f < 100Hz
100
100Hz
f < 1MHz
40
Supply Noise Tolerance
(Note 4)
1MHz
f < 2.5GHz
10
mVp-p
OPERATION AT 2.125Gbps (Note 2)
Input = K28.7 (Note 5)
4.4
Input = CRPAT (Note 6)
2.8
Random Jitter Generation at
OUT
+
and CLK
+
Input = CRPAT (Notes 6, 7)
2.9
ps
RMS
Input = K28.5 (Note 8)
22
Deterministic Jitter on OUT
+
Input = RPAT (Notes 7, 9)
48
psp-p
Total Jitter at OUT
+
Input = RPAT (Notes 7, 9, 10)
99
psp-p
f = 85kHz
1.5
f = 1270kHz
0.1
Sinusoidal Component of Jitter
Tolerance (BER = 10
-12
)
Input = CJTPAT
(Notes 3, 7)
f = 10MHz
0.1
UI
Total High-Frequency Jitter
Tolerance
Input = CJTPAT (Notes 3, 7, 9)
0.7
UI
Jitter Transfer Bandwidth
Measured with 50% edge density
11
MHz
Jitter Transfer Peaking
(Note 11)
0.05
dB
Propagation Delay
1.0
1.5
ns
Clock to Q Delay
Falling clock to data transition
150
280
300
ps
OPERATION AT 1.0625Gbps (Note 2)
Input = K28.7 (Note 5)
6.2
Input = CRPAT (Note 6)
3.6
Random Jitter Generation at
OUT
+
and CLK
+
Input = CRPAT (Notes 6, 7)
4.9
ps
RMS
Input = K28.5 (Note 8)
40
Deterministic Jitter on OUT
+
Input = RPAT (Notes 7, 9)
75
psp-p
Total Jitter at OUT
+
Input = RPAT (Notes 7, 9, 10)
160
psp-p
f = 42.5kHz
1.5
f = 635kHz
0.1
Sinusoidal Component of Jitter
Tolerance (BER = 10
-12
)
Input = CJTPAT
(Notes 3, 7)
f = 5MHz
0.1
UI
Total High-Frequency Jitter
Tolerance
Input = CJTPAT (Notes 3, 7, 9)
0.7
UI
Jitter Transfer Bandwidth
Measured with 50% edge density
6
MHz
Jitter Transfer Peaking
(Note 11)
0.05
dB
Propagation Delay
5
ns
Clock to Q Delay
Falling clock to data transition
200
510
740
ps
MAX3772­MAX3775
Note 1: Supply current includes output currents.
Note 2: Guaranteed by design and characterization.
Note 3: Compliant jitter tolerance pattern in hex (CJTPAT):
Pattern Sequence:
Repetitions:
3E AA 2A AA AA
6
3E AA A6 A5 A9
1
87 1E 38 71 E3
41
87 1E 38 70 BC 78 F4 AA AA AA
1
AA AA AA AA AA
12
AA A1 55 55 E3 87 1E 38 71 E1
1
AB 9C 96 86 E6
1
C1 6A AA 9A A6
1
Note 4: Meets jitter output specifications with noise applied.
Note 5: K28.7 Pattern: 00 1111 1000.
Note 6: Compliant random pattern in hex (CRPAT):
Pattern Sequence:
Repetitions:
3E AA 2A AA AA
6
3E AA A6 A5 A9
1
86 BA 6C64 75 D0 E8 DC A8 B4 79 49 EA A6 65
16
72 31 9A 95 AB
1
C1 6A AA 9A A6
1
Note 7: Parameter measured with 0.40UI deterministic jitter (patterns other than K28.7), and 0.20UI random jitter (BER = 10
-
12
)
applied to the input. Jitter is in compliance with the inter-enclosure, fibre channel jitter tolerance (at compliance point
R
)
and jitter output (at compliance point
T
) specifications (FC-PI rev 10.0). Output jitter is specified as an output total given a
non-zero jitter input.
Note 8: K28.5 Pattern: 00 1111 1010 11 0000 0101
Note 9: Random Pattern in hex (RPAT): 3EB0 5C67 85D3 172C A856 D84B B6A6 65
Note 10: Using differential drive over the entire input amplitude range. The input signal bandwidth is limited to 0.75 x (bit-rate) by a 4th-
order Bessel Thompson filter or equivalent. Total jitter (TJ) is the range of the eye pattern where the BER exceeds
10
-12
. TJ can be estimated as TJ = DJ + 14 x RJ. DJ is deterministic jitter. RJ is a one sigma distribution (RMS) of random jitter.
Note 11: Simulation shows peaking of 0.01dB max. Characterization results limited by test equipment.
Dual-Rate Fibre Channel Repeaters
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, 8B/10B data coding, C
F
= 0.047µF, lock pin loaded with
15k resistor, all high-speed inputs and outputs
AC-coupled, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
MAX3772­MAX3775
Dual-Rate Fibre Channel Repeaters
_______________________________________________________________________________________
5
-10
-8
-9
-6
-5
-4
-3
-2
-7
0
-1
1
10k
100k
1M
10M
2.125Gbps JITTER TRANSFER
vs. FREQUENCY
MAX3772-75 toc01
FREQUENCY (Hz)
JITTER ATTENUATION (dB)
200mVp-p INPUT SIGNAL,
PATTERN = CRPAT
-10
-8
-9
-6
-5
-4
-3
-2
-7
0
-1
1
10k
100k
1M
10M
1.0625Gbps JITTER TRANSFER
vs. FREQUENCY
MAX3772-75 toc02
FREQUENCY (Hz)
JITTER ATTENUATION (dB)
200mVp-p INPUT SIGNAL,
PATTERN = CRPAT
100
0.1
10k
1M
10M
2.125Gbps JITTER TOLERANCE
1
10
MAX3772 toc03
FREQUENCY (Hz)
SINUSOIDAL JITTER (UIp-p)
100k
CJTPAT
PATTERN,
DJ = 0.4UI
RJ = 0.2UI
TOLERANCE EXCEEDS THE TEST
EQUIPMENT'S GENERATION LIMIT
FIBRE
CHANNEL
MASK
100
0.1
10k
1M
10M
1.0625Gbps JITTER TOLERANCE
1
10
MAX3772 toc04
FREQUENCY (Hz)
SINUSOIDAL JITTER (UIp-p)
100k
CJTPAT
PATTERN,
DJ = 0.4UI
RJ = 0.2UI
TOLERANCE EXCEEDS THE TEST
EQUIPMENT'S GENERATION LIMIT
FIBRE
CHANNEL
MASK
OUTPUT EYE DIAGRAM AT
OUT
± (2.125Gbps CRPAT)
MAX3772-75 toc05
INPUT = 600mV
DJ = 0.4UI
RJ = 0.2UI
MAX3772-75 toc06
OUTPUT EYE DIAGRAM AT
OUT
± (1.0625Gbps CRPAT)
INPUT = 600mV
DJ = 0.4UI
RJ = 0.2UI
1E-12
1E-10
1E-11
1E-09
1E-08
1E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
1E+00
2.125Gbps OUTPUT JITTER
BATHTUB PLOT
MAX3772-75 toc07
DATA-CROSSING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
BIT ERROR RATE
0
0.4
0.2
0.6
0.8
1.0
2.125Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
1E-12
1E-10
1E-11
1E-09
1E-08
1E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
1E+00
1.0625Gbps OUTPUT JITTER
BATHTUB PLOT
MAX3772-75 toc08
DATA-CROSSING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
BIT ERROR RATE
0
0.4
0.2
0.6
0.8
1.0
1.0625Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)