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 100Ω (differential) and
150Ω (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.
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
100Ω/150Ω (differential) Input/Output
Terminations
MAX3772–MAX3775
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
Applications
1.0625Gbps/2.125Gbps Dual-Rate
Fibre Channel
Fibre Channel Data Storage Systems
Storage Area Networks
Fibre Channel Hubs
100Ω/150Ω (Differential) Impedance
Transformation
Pin Configuration appears at end of data sheet.
Selector Guide appears at end of data sheet.
Typical Operating Circuits
0.047µF
LOUT+
LOCK
LIN-
LIN+
LOUT+
LIN-
SEL
LOUT-
CLK+
CLK-
IN+
OUT+
Z
o
= 75Ω
Z
o
= 75Ω
IN+
IN-
MAX3750
IN-
V
CC
SEL
OUT-
GND
MAX3775
RATESEL
OUT+
OUT-
Z
o
= 75Ω
Z
o
= 75Ω
IN+
LOUT-
OUT+
MAX3750
IN-
V
CC
OUT-
GND
CLKEN
3.3V
0.1µF
3.3V
0.1µF
GND
V
CC
3.3V
0.1µF
PORT BYPASS CIRCUIT
FIBRE CHANNEL REPEATER
PORT BYPASS CIRCUIT
________________________________________________________________
Maxim Integrated Products
LIN+
CF+
CF-
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.
Dual-Rate Fibre Channel Repeaters
MAX3772–MAX3775
ABSOLUTE MAXIMUM RATINGS
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
= 75Ω ........ +22mA
CML Output Currents (OUT±, CLK±), R
OUT
= 50Ω ........ +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
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
(V
CC
= +3.0V to +3.6V, 8B/10B data coding, C
F
= 0.047µF, lock pin loaded with
≥
15kΩ 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
CLKEN = GND
Supply Current (Note 1)
CLKEN = V
CC
CONDITIONS
MAX3772/MAX3773
MAX3774/MAX3775
MAX3772/MAX3773
MAX3774/MAX3775
MAX3772/MAX3773,
100Ω terminated
Figure 1
MAX3774/MAX3775,
150Ω terminated
MAX3772/MAX3773
100Ω terminated
MAX3774/MAX3775,
150Ω terminated
1000
1000
1000
-100
-100
136
75
100
50
2.4
-50
-0.3
2
200
V
CC -
0.45
(Note 2)
Input = CJTPAT (Note 3)
500
V
CC
50
0.8
V
CC
+ 0.3
2200
130
75
1400
1400
1400
1800
1800
mVp-p
1800
+100
+100
325
160
175
100
0.4
ppm
ps
ps
ps
V
V
µA
V
V
mVp-p
V
V
µs
MIN
80
68
115
95
1000
TYP
101
88
146
121
1400
MAX
140
124
195
164
1800
mVp-p
mA
UNITS
Differential Voltage Signal
at OUT+
Differential Voltage Signal
at CLK+
Figure 1
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
1.0625Gbps operation, RATESEL = GND
2.125Gbps operation, RATESEL = V
CC
20% to 80% 1.0625Gbps operation
20% to 80% 2.125Gbps operation
20% to 80% (Note 2)
20% to 80% (Note 2)
I
OL
= +250µA (sinking)
I
OH
= -100µA (sourcing)
2
_______________________________________________________________________________________
Dual-Rate Fibre Channel Repeaters
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, 8B/10B data coding, C
F
= 0.047µF, lock pin loaded with
≥
15kΩ 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
Differential Input Resistance
(IN+)
Differential Output Resistance
(OUT+, CLK+)
Supply Noise Tolerance
(Note 4)
MAX3772/MAX3774
MAX3773/MAX3775
MAX3772/MAX3773
MAX3774/MAX3775
10Hz
≤
f
<
100Hz
100Hz
≤
f
<
1MHz
CONDITIONS
MIN
78
118
78
118
TYP
100
150
100
150
100
40
10
4.4
2.8
2.9
22
48
99
f = 85kHz
Sinusoidal Component of Jitter
Tolerance (BER = 10
-12
)
Total High-Frequency Jitter
Tolerance
Jitter Transfer Bandwidth
Jitter Transfer Peaking
Propagation Delay
Clock to Q Delay
Falling clock to data transition
Input = K28.7 (Note 5)
Random Jitter Generation at
OUT+ and CLK+
Deterministic Jitter on OUT+
Total Jitter at OUT+
Sinusoidal Component of Jitter
Tolerance (BER = 10
-12
)
Total High-Frequency Jitter
Tolerance
Jitter Transfer Bandwidth
Jitter Transfer Peaking
Propagation Delay
Clock to Q Delay
Falling clock to data transition
200
510
Input = CRPAT (Note 6)
Input = CRPAT (Notes 6, 7)
Input = K28.5 (Note 8)
Input = RPAT (Notes 7, 9)
Input = RPAT (Notes 7, 9, 10)
f = 42.5kHz
Input = CJTPAT
(Notes 3, 7)
f = 635kHz
f = 5MHz
Input = CJTPAT (Notes 3, 7, 9)
Measured with 50% edge density
(Note 11)
1.5
0.1
0.1
0.7
6
0.05
5
740
UI
MHz
dB
ns
ps
UI
150
OPERATION AT 1.0625Gbps
(Note 2)
6.2
3.6
4.9
40
75
160
psp-p
psp-p
ps
RMS
Input = CJTPAT
(Notes 3, 7)
f = 1270kHz
f = 10MHz
Input = CJTPAT (Notes 3, 7, 9)
Measured with 50% edge density
(Note 11)
1.0
280
1.5
0.1
0.1
0.7
11
0.05
1.5
300
UI
MHz
dB
ns
ps
UI
psp-p
psp-p
ps
RMS
mVp-p
MAX
122
182
122
182
UNITS
Ω
Ω
MAX3772–MAX3775
1MHz
≤
f
<
2.5GHz
OPERATION AT 2.125Gbps
(Note 2)
Input = K28.7 (Note 5)
Random Jitter Generation at
Input = CRPAT (Note 6)
OUT+ and CLK+
Input = CRPAT (Notes 6, 7)
Deterministic Jitter on OUT+
Total Jitter at OUT+
Input = K28.5 (Note 8)
Input = RPAT (Notes 7, 9)
Input = RPAT (Notes 7, 9, 10)
_______________________________________________________________________________________
3
Dual-Rate Fibre Channel Repeaters
MAX3772–MAX3775
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, 8B/10B data coding, C
F
= 0.047µF, lock pin loaded with
≥
15kΩ 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.)
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:
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:
Repetitions:
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
α
R
)
and jitter output (at compliance point
α
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.
4
_______________________________________________________________________________________
Dual-Rate Fibre Channel Repeaters
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
MAX3772–MAX3775
2.125Gbps JITTER TRANSFER
vs. FREQUENCY
MAX3772-75 toc01
1.0625Gbps JITTER TRANSFER
vs. FREQUENCY
MAX3772-75 toc02
2.125Gbps JITTER TOLERANCE
TOLERANCE EXCEEDS THE TEST
EQUIPMENT'S GENERATION LIMIT
0
-1
JITTER ATTENUATION (dB)
-2
-3
-4
-5
-6
-7
-8
-9
-10
10k
100k
1M
200mVp-p INPUT SIGNAL,
PATTERN = CRPAT
0
-1
JITTER ATTENUATION (dB)
-2
-3
-4
-5
-6
-7
-8
-9
200mVp-p INPUT SIGNAL,
PATTERN = CRPAT
SINUSOIDAL JITTER (UIp-p)
CJTPAT
PATTERN,
DJ = 0.4UI
RJ = 0.2UI
10
1
FIBRE
CHANNEL
MASK
0.1
10M
-10
10k
100k
1M
10M
FREQUENCY (Hz)
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
1.0625Gbps JITTER TOLERANCE
MAX3772 toc04
OUTPUT EYE DIAGRAM AT
OUT± (2.125Gbps CRPAT)
MAX3772-75 toc05
OUTPUT EYE DIAGRAM AT
OUT± (1.0625Gbps CRPAT)
MAX3772-75 toc06
100
TOLERANCE EXCEEDS THE TEST
EQUIPMENT'S GENERATION LIMIT
SINUSOIDAL JITTER (UIp-p)
CJTPAT
PATTERN,
DJ = 0.4UI
RJ = 0.2UI
10
INPUT = 600mV
DJ = 0.4UI
RJ = 0.2UI
1
FIBRE
CHANNEL
MASK
0.1
10k
100k
1M
10M
FREQUENCY (Hz)
INPUT = 600mV
DJ = 0.4UI
RJ = 0.2UI
2.125Gbps OUTPUT JITTER
BATHTUB PLOT
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
0.2
2.125Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
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
MAX3772-75 toc07
1.0625Gbps OUTPUT JITTER
BATHTUB PLOT
1.0625Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
MAX3772-75 toc08
BIT ERROR RATE
BIT ERROR RATE
0.4
0.6
0.8
1.0
0.2
0.4
0.6
0.8
1.0
DATA-CROSSING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
DATA-CROSSING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
_______________________________________________________________________________________
MAX3772 toc03
1
1
100
5
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