19-2098; Rev 1; 1/02
Dual-Rate, 1Gbps/2Gbps Fibre Channel
Quad-Port Bypass ICs with Repeater
General Description
The MAX3754/MAX3755 quad-port bypass circuits
(PBCs) are designed for use in Fibre Channel Arbitrated
Loop applications. Each consists of four serially con-
nected port bypass circuits and a repeater that provides
clock and data recovery. The quad-PBC allows connec-
tion of up to four Fibre Channel L-ports; each can be
enabled or bypassed by individual logic inputs. To
reduce the external parts count, all signal inputs and
outputs have internal termination resistors. The
MAX3754/MAX3755 comply with Fibre Channel jitter tol-
erance requirements and can recover data signals with
up to 0.7 unit intervals (UIs) of high-frequency jitter.
These devices operate from a single +3.3V supply.
Features
o
Pin Selectable 1.0625Gbps/2.125Gbps Dual-Rate
Operation
o
Meets Fibre Channel Jitter Tolerance
o
1400mV Typical Differential Output Swing
o
3.0V to 3.6V Operation
o
No Reference Clock Required
o
Frequency Lock Indication
o
1W Power Consumption (MAX3754) at +3.3V
o
150Ω or 100Ω Differential L-Port Impedance
Available
MAX3754/MAX3755
Applications
1.0625Gbps/2.125Gbps Dual-Rate Fibre Channel
Fibre Channel Data Storage Systems
Storage Area Networks
Fibre Channel Hubs
GND
LIN1-
LIN1+
GND
LOUT1-
LOUT1+
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Pin Configuration
LOUT2+
LOUT2-
GND
LIN2+
LIN2-
GND
GND
LOUT3+
LOUT3-
GND
LIN3+
LIN3-
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
GND
LOUT4+
LOUT4-
GND
LIN4+
LIN4-
GND
GND
OUT-
OUT+
GND
LOCK
Typical Operating Circuit appears at end of data sheet.
GND
GND
IN-
IN+
GND
CLKEN
MAX3754
MAX3755
31
30
29
28
27
26
25
18
19
20
21
22
23
*EXPOSED PAD MUST BE CONNECTED TO GROUND
PART
MAX3754CCM
MAX3755CCM
TEMP RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
48 TQFP-EP
48 TQFP-EP
DIFFERENTIAL LIN
AND LOUT
TERMINATION
150Ω
100Ω
CF+
CF-
V
CC
SEL1
SEL2
SEL3
SEL4
V
CC
CDREN
RATESEL
V
CC
V
CC
TQFP-EP*
Ordering Information
DIFFERENTIAL IN
AND OUT
TERMINATION
100Ω
100Ω
________________________________________________________________
Maxim Integrated Products
24
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, 1Gbps/2Gbps Fibre Channel
Quad-Port Bypass ICs with Repeater
MAX3754/MAX3755
ABSOLUTE MAXIMUM RATINGS
V
CC
...........................................................................-0.5V to +5V
Current into OUT±, LOUT1±, LOUT2±,
LOUT3±, LOUT4±.......................................................... 22mA
Voltage at OUT±, LOUT1±, LOUT2±,
LOUT3±, LOUT4± .....................(V
CC
- 1.65V) to (V
CC
+ 0.5V)
Voltage at IN±, LIN1±, LIN2±, LIN3±,
LIN4±......................................................-0.5V to (V
CC
+ 0.5V)
Voltage at CLKEN, CF+, CF-, CDREN, RATESEL,
SEL_, LOCK............................................-0.5V to (V
CC
+ 0.5V)
Current into LOCK...............................................-1mA to +10mA
Continuous Power Dissipation (T
A
= +70°C)
48-Pin TQFP-EP (derate 30.0mW/°C above +70°C) ...........2W
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, CLKEN = GND, 8B/10B data coding, C
F
= 0.047µF, T
A
= 0°C to +70°C, unless otherwise noted.
Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
PARAMETER
CDREN = GND
Supply Current (Note 1)
CDREN = V
CC
Input Data Rate Range
Differential Input Voltage Swing
Input Common-Mode Voltage
Differential Output Voltage
Swing
Differential L-Port Input
Resistance
Differential L-Port Output
Resistance
Differential Input Resistance at
IN±
Differential Output Resistance at
OUT±
TTL Low Input Voltage
TTL High Input Voltage
TTL Input Current
LOCK Output Low Voltage
LOCK Output High Voltage
Differential Voltage across CF±
Data Propagation Delay
IN± to OUT±, SEL_ = GND, CDREN = V
CC
LIN(n)± to LOUT(n+1)±, LIN4± to OUT±
0
≤
TTL input voltages
≤
V
CC
I
OL
= +1mA (sinking)
I
OH
= -100µA (sourcing)
2.4
V
CC
3
1
2
-50
50
0.4
R
LOAD
= R
SOURCE
MAX3754
MAX3755
MAX3754
MAX3755
1000
118
78
118
78
78
78
CONDITIONS
MAX3754
MAX3755
MAX3754
MAX3755
-100
-100
200
V
CC
-
0.45
1400
150
100
150
100
100
100
1800
182
122
182
122
122
122
0.8
MIN
TYP
245
285
308
349
MAX
285
334
362
411
+100
+100
2200
ppm
mV
P-P
V
mV
P-P
Ω
Ω
Ω
Ω
V
V
µA
V
V
V
ns
mA
UNITS
1.0625Gbps operation, RATESEL = GND
2.125Gbps operation, RATESEL = V
CC
2
_______________________________________________________________________________________
Dual-Rate, 1Gbps/2Gbps Fibre Channel
Quad-Port Bypass ICs with Repeater
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, CLKEN = GND, 8B/10B data coding, C
F
= 0.047µF, T
A
= 0°C to +70°C, unless otherwise noted.
Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
PARAMETER
Channel Select Delay to Data
Valid
Data Transition Time
Supply Noise Tolerance (Note 2)
CDR Lock Time
OPERATION AT 2.125Gbps
(Note 3)
Pattern = K28.7, CDREN = GND (Note 4)
Random Jitter at OUT±,
Pattern = K28.7, CDREN = V
CC
L-Port Outputs±
Pattern = CRPAT, CDREN = V
CC
(Notes 5, 6)
Pattern = K28.5+, CDREN = GND (Note 7)
Deterministic Jitter at OUT±,
L-Port Outputs±
Total Jitter at OUT±, LOUT_±
Sinusoidal Component of Jitter
Tolerance (BER = 10
-12
)
Deterministic Jitter Tolerance
Total High-Frequency Jitter
Tolerance
Jitter Transfer Bandwidth
Jitter Transfer Peaking
(Note 12)
1.7
5.4
3.8
27
19
37
1.5
0.1
0.1
UI
60
50
75
135
ps
P-P
ps
P-P
ps
RMS
OPERATION AT 1.0625Gbps
(Note 3)
Pattern = K28.7, CDREN = GND (Note 4)
Random Jitter at OUT±,
Pattern = K28.7, CDREN = V
CC
L-Port Outputs±
Pattern = CRPAT, CDREN = V
CC
(Notes 5, 6)
Pattern = K28.5+, CDREN = GND (Note 7)
Deterministic Jitter at OUT±,
L-Port Outputs±
Total Jitter at OUT±, LOUT_±
Sinusoidal Component of Jitter
Tolerance (BER = 10
-12
)
Pattern = K28.5+, CDREN = V
CC
Pattern = RPAT, CDREN = V
CC
(Notes 6, 8, 9)
Pattern = RPAT, CDREN = V
CC
(Notes 6, 8, 9)
f = 42.5kHz sine wave
Pattern = CJTPAT
(Notes 6, 10)
f = 635kHz sine wave
f = 5MHz sine wave
Pattern = K28.5+, CDREN = V
CC
Pattern = RPAT, CDREN = V
CC
(Notes 6, 8, 9)
Pattern = RPAT, CDREN = V
CC
(Notes 6, 8, 9)
f = 85kHz sine wave
Pattern = CJTPAT
(Notes 6, 10)
CJTPAT (Note 10)
Pattern = CJTPAT (Notes 6, 10, 11)
f = 1.27MHz sine wave
f = 10MHz sine wave
1.5
0.1
0.1
0.4
0.7
6
10
0.05
UI
UI
MHz
dB
UI
CONDITIONS
SEL(n)± to LOUT(n+1)± , SEL4 to OUT±
20% to 80%
10Hz
≤
f
<
100Hz
100Hz
≤
f
<
1MHz
1MHz
≤
f
<
2.5GHz
65
MIN
TYP
9
110
100
40
10
530
1.6
4.1
3
29
19
28
60
50
50
105
ps
P-P
ps
P-P
ps
RMS
µs
mV
P-P
160
MAX
UNITS
ns
ps
MAX3754/MAX3755
_______________________________________________________________________________________
3
Dual-Rate, 1Gbps/2Gbps Fibre Channel
Quad-Port Bypass ICs with Repeater
MAX3754/MAX3755
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, CLKEN = GND, 8B/10B data coding, C
F
= 0.047µF, T
A
= 0°C to +70°C, unless otherwise noted.
Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
PARAMETER
Deterministic Jitter Tolerance
Total High-Frequency Jitter
Tolerance
Jitter Transfer Bandwidth
Jitter Transfer Peaking
(Note 12)
CONDITIONS
CJTPAT (Note 10)
Pattern = CJTPAT (Notes 6, 10, 11)
MIN
0.4
0.7
3
5
0.05
TYP
MAX
UNITS
UI
UI
MHz
dB
Includes output currents.
Meets jitter output specifications with noise applied.
AC characteristics are guaranteed by design and characterization.
K28.7 Pattern: 00 1111 1000
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 6:
Parameter measured with 0.40UI deterministic and 0.20UI random jitter (BER = 10
-12
) applied to the input. All ports are
bypassed, SEL_ = TTL low. 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 7:
K28.5± Pattern: 00 1111 1010 11 0000 0101
Note 8:
Random Pattern in Hex (RPAT): 3EB0 5C67 85D3 172C A856 D84B B6A6 65
Note 9:
Using differential drive over the entire input amplitude range. The input signal bandwidth is limited to 0.75
✕
(bit-rate) by a
4th-order Bessel-Thompson filter or equivalent. Total jitter (TJ) is the range of the eye pattern where the bit error rate
exceeds 10
-12
. TJ can be estimated as TJ = DJ + (14
✕
RJ). DJ is deterministic jitter. RJ is one sigma distribution (RMS) of
random jitter.
Note 10:
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 11:
Parameter measured with 0.1UI sinusoidal jitter at 10MHz for 2.125Gbps data rate, or 5MHz for 1.0625Gbps.
Note 12:
Simulation shows peaking of 0.01dBm max. Characterization results limited by test equipment.
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
4
_______________________________________________________________________________________
Dual-Rate, 1Gbps/2Gbps Fibre Channel
Quad-Port Bypass ICs with Repeater
Typical Operating Characteristics
(V
CC
= +3.3V, C
F
= 0.047µF, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERTURE
(MAX3754)
MAX3754 toc01
MAX3754/MAX3755
OUTPUT EYE DIAGRAM AT OUT±
(1.0625Gbps CRPAT, CDR ENABLED)
MAX3754 toc02
OUTPUT EYE DIAGRAM AT OUT±
(2.125Gbps CRPAT, CDR ENABLED)
MAX3754 toc03
340
320
SUPPLY CURRENT (mA)
CDR ENABLED
300
280
260
240
220
200
0
10
20
30
40
50
60
CDR DISABLED
200mV/
div
INPUT =
400mV
P-P
DJ = 0.4UI
RJ = 0.2UI
200mV/
div
INPUT =
400mV
P-P
DJ = 0.4UI
RJ = 0.2UI
70
200ps/div
100ps/div
TEMPERATURE (°C)
OUTPUT JITTER BATHTUB PLOT
(1.0625Gbps)
MAX3754 toc04
OUTPUT JITTER BATHTUB PLOT
(2.125Gbps)
10
-1
10
-2
10
-3
10
-4
10
-5
10
-6
10
-7
10
-8
10
-9
10
-10
10
-11
10
-12
0
2.125Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
MAX3754 toc05
1
10
-1
10
-2
10
-3
10
-4
10
-5
10
-6
10
-7
10
-8
10
-9
10
-10
10
-11
10
-12
0
1
BIT ERROR RATE
1.0625Gbps CRPAT AT INPUT
(DJ = 0.4UI, RJ = 0.2UI)
BIT ERROR RATE
0.2
0.4
0.6
0.8
1.0
0.2
0.4
0.6
0.8
1.0
DATA SAMPLING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
DATA SAMPLING TIME RELATIVE TO
FIRST ZERO CROSSING (UI)
JITTER TOLERANCE
1.0625Gbps
MAX3754 toc06
JITTER TOLERANCE
2.125Gbps
CJTPAT
DJ = 0.4UI
RJ = 0.2UI
1
MAX3754 toc07
10
CJTPAT
DJ = 0.4UI
RJ = 0.2UI
1
10
SINUSOIDAL JITTER (UI
P-P
)
FIBRE CHANNEL
MASK
0.1
SINUSOIDAL JITTER (UI
P-P
)
FIBRE CHANNEL
MASK
0.1
0.01
10k
100k
1M
10M
FREQUENCY (Hz)
0.01
10k
100k
1M
10M
FREQUENCY (Hz)
_______________________________________________________________________________________
5
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