74741_04 Datasheet, PDF (3/4 Pages) Molex Electronics Ltd. – 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver

ACTIVE PERFORMANCE SPECIFICATIONS
1000Base-T RJ-45 Gigabit
Ethernet SFP Copper
Transceiver
Module Specifications - Recommended Operating Conditions
74741
PARAMETERS
Storage Temperature
Ambient Operating Temperature
Supply Voltage
Supply Current
Surge Current
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Tstg
-40
85
°C
Ta
0
70
°C
V_DDR, V_DDT
3.13
3.3
3.47
Vdc
Vcc-ground
Icc
285
300
mA
Isurge
TBD
mA
Surge above steady
state value
SFP Host Serial Interface (TX/RX)
Data Input/Output Type
Impedance (SERDES Interface)
LVDS, AC coupled
100
ohms
Differential
Transmitter (Input to SFP)
Input Voltage
400
2400
mVpp
Receiver (Output to SERDES)
Output Voltage
Max Off Voltage
Rise Time, 20%–80%
Total Jitter
Skew
875
1525
mVpp
170
mVpp
100
200
ps
80
120
ps
15
30
ps
IMPEDANCE MATCHING AND POWER SUPPLY FILTERING
The SFP transceiver module’s signal inputs/outputs are AC coupled and internally terminated to 100 ohms (TD+, TD-, RD+, RD-). Each leg of the differential pair is equally
matched in length to reduce signal skew.
1.0µH
VccT
0.1µF
1.0µH
VccR
0.1µF
10µF
0.1µF
10µF
3.3V
SFP Module
Figure 2. Recommended Host Board Supply Filtering Network