Fast Ethernet 10/100 Hex Transceiver with Full MII — LXT9763
Table 13. Magnetics Requirements
Parameter
Min
Nom
Max
Units
Test Condition
60 to 100 MHz
35
-16
-10
2.0
–
–
–
–
–
–
dB
dB
dB
ns
30 MHz
Return Loss
Rise Time
–
80 MHz
3.5
10% to 90%
2.2
Typical Application Circuits
Figure 18 shows a typical layout of the LXT9763 twisted-pair interface in a dual-high (stacked)
RJ-45 application.
Figure 17. Power and Ground Supply Connections
LXT9763
GNDS
22.1 kΩ 1%
RBIAS
GNDA
.01µ
F
.01µF
VCCT
VCCR
10µF
+
Analog Supply Plane
Digital Supply Plane
Ferrite
Bead
10µF
+3.3V
+3.3V
VCCD
GNDD
VCCIO
.01µF
.01µF
10µF
Datasheet
41