Dual-Rate Fibre Channel Limiting Amplifier
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V ) ............................................-0.5V to +6.0V
Voltage at TH ................................................-0.5V to V
+ 0.5V
CC
CC
Continuous CML Output Current
(OUT+, OUT-) ...............................................-25mA to +25mA
CML Input Voltage (IN+, IN-) .....................-0.5V to (V + 0.5V)
Differential Input Voltage (IN+, IN-).....................................2V
Current into TH...................................................................5.0mA
Open Collector (LOS, LOS)...................................-0.5V to +5.5V
Operating Ambient Temperature Range.............-40°C to +85°C
Storage Ambient Temperature Range...............-55°C to +100°C
CC
P-P
TTL Input Voltage
(BWSEL, SQUELCH, TEST)....................-0.5V to (V + 0.5V)
CC
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
= +3.0V to +3.6V, T = 0°C to +85°C. Typical values are at V
= +3.3V and T = +25°C, unless otherwise noted.)
CC A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
0.77
10
TYP
78
MAX
UNITS
Supply Current
99
mA
BWSEL = 0
BWSEL = 1
1.0625
2.125
0.89
Data Rate
Gbps
-3dB, BWSEL = 0 (Note 1)
-15dB, BWSEL = 0 (Note 1)
-3dB, BWSEL = 1 (Note 1)
(Note 2)
1.0
2.0
Small-Signal Bandwidth
GHz
µs
1.7
BWSEL Response Time
Input Range
10
1200
60
V
(Notes 2, 3)
mV
IN
P-P
BWSEL = 0, 10mV ≤ input ≤ 20mV (Notes 2, 4)
BWSEL = 0, 20mV < input ≤ 1200mV (Notes 2, 4)
BWSEL = 1, 10mV ≤ input ≤ 1200mV (Notes 2, 4)
BWSEL = 0 (Notes 2, 5)
BWSEL = 1 (Notes 2, 5)
BWSEL = 0 (Note 6)
44
37
Deterministic Jitter
44
ps
P-P
10
20
5.1
2.8
117
49
Random Jitter
Total Jitter
ps
RMS
ps
P-P
BWSEL = 1 (Note 6)
LOS, LOS Transition Time
LOS, LOS Response Time
10% to 90% rise/fall time (Notes 2, 7)
Figure 1 (Note 2)
5
1
350
20
ns
µs
✕
20 log (V
(Note 8)
/V
), V = 6mV
DEASSERT ASSERT TH P-P
2
8
LOS, LOS Hysteresis
dB
V
= 30mV
(Notes 2, 8)
4
8
8
30
TH
P-P
LOS Assert (V
LOS Assert (V
) Range
) Error
330Ω < R < 2.0kΩ (Notes 2, 8)
mV
%
LOS
LOS
TH
330Ω < R < 2.0kΩ (Notes 2, 8)
-30
+30
100
60
TH
Squelch Input Current
µA
Ω
Single-Ended Input Resistance
Data Input VSWR
R
IN+, IN- to V
40
50
IN
CC
f < 2GHz (Note 2)
2.5
120
1600
30
Differential Output Resistance
R
OUT+ to OUT- (MAX3274)
SQUELCH = 0 (Note 4)
80
100
Ω
OUT
900
1200
CML Output Voltage
Data Output Levels
V
mV
P-P
OUT
SQUELCH = 1, V < V (Note 4)
IN
TH
SQUELCH = 1, V < V (Note 4)
V
- 0.1
V
CC
V
IN
TH
CC
2
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