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19-2192; Rev 0; 10/01
Dual-Rate Fibre Channel Repeaters
General Description
The MAX3772–MAX3775 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
MAX3772–MAX3775 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 MAX3772–MAX3775 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
Ordering Information
PART
MAX3772CEE
MAX3773CEE
MAX3774CEE
MAX3775CEE
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
16 QSOP-EP
16 QSOP-EP
16 QSOP-EP
16 QSOP-EP
Pin Configuration appears at end of data sheet.
Selector Guide appears at end of data sheet.
Typical Operating Circuits
0.047µF
IN+ OUT+
MAX3750
IN- OUT-
Zo = 75
Zo = 75
CLK+
CLK-
IN+ OUT+
MAX3775
IN- OUT-
Zo = 75
Zo = 75
IN+ OUT+
MAX3750
IN- OUT-
3.3V 3.3V 3.3V
0.1µF
0.1µF
0.1µF
PORT BYPASS CIRCUIT
FIBRE CHANNEL REPEATER
PORT BYPASS CIRCUIT
________________________________________________________________ Maxim Integrated Products 1
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.

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Dual-Rate Fibre Channel Repeaters
ABSOLUTE MAXIMUM RATINGS
VCC ........................................................................-0.5V to +5.0V
Pin Voltage Levels (IN±, CF±,
RATESEL, CLKEN, LOCK) .....................-0.5V to (VCC + 0.5V)
Current into LOCK...............................................-1mA to +10mA
CML Output Currents (OUT±, CLK±), ROUT = 75........ +22mA
CML Output Currents (OUT±, CLK±), ROUT = 50........ +33mA
Continuous Power Dissipation (TA = +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
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.
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, 8B/10B data coding, CF = 0.047µF, lock pin loaded with 15kresistor, all high-speed inputs and outputs
AC-coupled, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.)
PARAMETER
Supply Current (Note 1)
Differential Voltage Signal
at OUT+
Differential Voltage Signal
at CLK+
Input Data Rate Range
Input Edge Speed
Data Transition Time (OUT±)
Clock Transition Time (CLK±)
LOCK Output Low
LOCK Output High
CLKEN, RATESEL Input Current
CLKEN, RATESEL Input Low
CLKEN, RATESEL Input High
Differential Input Voltage Swing
Input Common-Mode Voltage
Differential Voltage across CF+
CDR Lock Time
CLKEN = GND
CLKEN = VCC
CONDITIONS
MAX3772/MAX3773
MAX3774/MAX3775
MAX3772/MAX3773
MAX3774/MAX3775
Figure 1
MAX3772/MAX3773,
100terminated
MAX3774/MAX3775,
150terminated
Figure 1
MAX3772/MAX3773
100terminated
MAX3774/MAX3775,
150terminated
1.0625Gbps operation, RATESEL = GND
2.125Gbps operation, RATESEL = VCC
20% to 80% 1.0625Gbps operation
20% to 80% 2.125Gbps operation
20% to 80% (Note 2)
20% to 80% (Note 2)
IOL = +250µA (sinking)
IOH = -100µA (sourcing)
(Note 2)
Input = CJTPAT (Note 3)
MIN
80
68
115
95
1000
1000
TYP
101
88
146
121
1400
1400
MAX
140
124
195
164
UNITS
mA
1800
1800
mVp-p
1000
1000
-100
-100
136
75
100
50
2.4
-50
-0.3
2
200
1400
1400
130
75
VCC -
0.45
500
1800
1800
mVp-p
+100
+100
325
160
175
100
0.4
50
0.8
VCC
+ 0.3
2200
ppm
ps
ps
ps
V
V
µA
V
V
mVp-p
V
VCC
V
µs
2 _______________________________________________________________________________________

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Dual-Rate Fibre Channel Repeaters
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, 8B/10B data coding, CF = 0.047µF, lock pin loaded with 15kresistor, all high-speed inputs and outputs
AC-coupled, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.)
PARAMETER
CONDITIONS
Differential Input Resistance
(IN+)
MAX3772/MAX3774
MAX3773/MAX3775
Differential Output Resistance
(OUT+, CLK+)
MAX3772/MAX3773
MAX3774/MAX3775
Supply Noise Tolerance
(Note 4)
10Hz f < 100Hz
100Hz f < 1MHz
1MHz f < 2.5GHz
OPERATION AT 2.125Gbps (Note 2)
Random Jitter Generation at
OUT+ and CLK+
Input = K28.7 (Note 5)
Input = CRPAT (Note 6)
Input = CRPAT (Notes 6, 7)
Deterministic Jitter on OUT+
Input = K28.5 (Note 8)
Input = RPAT (Notes 7, 9)
Total Jitter at OUT+
Input = RPAT (Notes 7, 9, 10)
Sinusoidal Component of Jitter
Tolerance (BER = 10-12)
Total High-Frequency Jitter
Tolerance
Jitter Transfer Bandwidth
Input = CJTPAT
(Notes 3, 7)
f = 85kHz
f = 1270kHz
f = 10MHz
Input = CJTPAT (Notes 3, 7, 9)
Measured with 50% edge density
Jitter Transfer Peaking
(Note 11)
Propagation Delay
Clock to Q Delay
Falling clock to data transition
OPERATION AT 1.0625Gbps (Note 2)
Random Jitter Generation at
OUT+ and CLK+
Input = K28.7 (Note 5)
Input = CRPAT (Note 6)
Input = CRPAT (Notes 6, 7)
Deterministic Jitter on OUT+
Input = K28.5 (Note 8)
Input = RPAT (Notes 7, 9)
Total Jitter at OUT+
Input = RPAT (Notes 7, 9, 10)
Sinusoidal Component of Jitter
Tolerance (BER = 10-12)
Input = CJTPAT
(Notes 3, 7)
f = 42.5kHz
f = 635kHz
f = 5MHz
Total High-Frequency Jitter
Tolerance
Input = CJTPAT (Notes 3, 7, 9)
Jitter Transfer Bandwidth
Measured with 50% edge density
Jitter Transfer Peaking
Propagation Delay
(Note 11)
Clock to Q Delay
Falling clock to data transition
MIN TYP MAX UNITS
78 100 122
118 150 182
78 100 122
118 150 182
100
40 mVp-p
10
4.4
2.8 psRMS
2.9
22
psp-p
48
99 psp-p
1.5
0.1 UI
0.1
0.7 UI
11 MHz
0.05 dB
1.0 1.5 ns
150 280 300 ps
6.2
3.6 psRMS
4.9
40
psp-p
75
160 psp-p
1.5
0.1 UI
0.1
0.7 UI
6 MHz
0.05 dB
5 ns
200 510 740 ps
_______________________________________________________________________________________ 3

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Dual-Rate Fibre Channel Repeaters
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, 8B/10B data coding, CF = 0.047µF, lock pin loaded with 15kresistor, all high-speed inputs and outputs
AC-coupled, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.)
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
3E AA A6 A5 A9
87 1E 38 71 E3
87 1E 38 70 BC 78 F4 AA AA AA
AA AA AA AA AA
AA A1 55 55 E3 87 1E 38 71 E1
AB 9C 96 86 E6
C1 6A AA 9A A6
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:
6
1
41
1
12
1
1
1
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 αR)
and jitter output (at compliance point αT) 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.
4 _______________________________________________________________________________________

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Dual-Rate Fibre Channel Repeaters
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
2.125Gbps JITTER TRANSFER
vs. FREQUENCY
1
0
-1
-2
-3
-4
-5
-6
-7
-8 200mVp-p INPUT SIGNAL,
PATTERN = CRPAT
-9
-10
10k
100k 1M
FREQUENCY (Hz)
10M
1.0625Gbps JITTER TOLERANCE
100
TOLERANCE EXCEEDS THE TEST
EQUIPMENT'S GENERATION LIMIT
CJTPAT
PATTERN,
DJ = 0.4UI
RJ = 0.2UI
10
1
1.0625Gbps JITTER TRANSFER
vs. FREQUENCY
1
0
-1
-2
-3
-4
-5
-6
-7
-8
200mVp-p INPUT SIGNAL,
PATTERN = CRPAT
-9
-10
10k 100k 1M 10M
FREQUENCY (Hz)
OUTPUT EYE DIAGRAM AT
OUT± (2.125Gbps CRPAT)
2.125Gbps JITTER TOLERANCE
100
TOLERANCE EXCEEDS THE TEST
EQUIPMENT'S GENERATION LIMIT
CJTPAT
PATTERN,
DJ = 0.4UI
RJ = 0.2UI
10
1
FIBRE
CHANNEL
MASK
0.1
10k
100k 1M
FREQUENCY (Hz)
OUTPUT EYE DIAGRAM AT
OUT± (1.0625Gbps CRPAT)
10M
INPUT = 600mV
DJ = 0.4UI
RJ = 0.2UI
INPUT = 600mV
DJ = 0.4UI
RJ = 0.2UI
FIBRE
CHANNEL
MASK
0.1
10k 100k 1M 10M
FREQUENCY (Hz)
2.125Gbps OUTPUT JITTER
BATHTUB PLOT
1E+00
1E-01
1E-02
2.125Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
1E-03
1E-04
1E-05
1E-06
1E-07
1E-08
1E-09
1E-10
1E-11
1E-12
0
0.2 0.4 0.6 0.8
DATA-CROSSING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
1.0
1E+00
1E-01
1E-02
1E-03
1E-04
1E-05
1E-06
1E-07
1E-08
1E-09
1E-10
1E-11
1E-12
0
1.0625Gbps OUTPUT JITTER
BATHTUB PLOT
1.0625Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
0.2 0.4 0.6 0.8
DATA-CROSSING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
1.0
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