MAX3980
3.125Gbps XAUI Quad Equalizer
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, input data rate = 3.125Gbps, T
A
= 0°C to +85°C. Typical values are at V
CC
= +3.3V and T
A
= +25°C, unless
otherwise noted.)
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.
Supply Voltage, V
CC
..............................................-0.5V to +4.0V
Voltage at SDET, IN_±................................-0.5V to (V
CC
+ 0.5V)
Current Out of OUT_±.......................................-25mA to +25mA
Continuous Power Dissipation (T
A
= +85°C)
44-Pin QFN-EP (derate 26.3mW/°C above +85°C)...2105mW
Operating Ambient Temperature Range ................0°C to +85°C
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
EN = TTL low 0.25
Supply Power
EN = TTL high 0.7 0.9
W
10Hz < f < 100Hz 100
100Hz < f < 1MHz 40
Supply Noise Tolerance
1MHz < f < 2.5GHz 10
mVp-p
Signal Detect Assert Input signal level to assert SDET (Note 1) 100 mVp-p
Signal Detect Deassert Input signal level to deassert SDET (Note 1) 30 mVp-p
Signal Detect Delay 10 μs
Latency From input to output 0.32 ns
CML RECEIVER INPUT
Input Voltage Swing
XAUI transmitter output measured
differentially at point A, Figure 1, using
K28.5 pattern
200 800 mVp-p
Return Loss 100MHz to 2.5GHz 12 dB
Input Resistance Differential 80 100 120 Ω
EQUALIZATION
Total jitter (Note 2) 0.3
Residual Jitter
Deterministic jitter 0.2
UIp-p
Random Jitter (Note 2) 1.5 ps
RMS
CML TRANSMITTER OUTPUT (into 100Ω ±1Ω)
Output Voltage Swing Differential swing 550 850 mVp-p
Common-Mode Voltage V
CC
- 0.3 V
Transition Time t
f
, t
r
20% to 80% (Note 3) 60 130 ps
Differential Skew
Difference in 50% crossing between OUT_+
and OUT_-
12 ps
Output Resistance Single ended 40 50 60 Ω
