DS_8430_001
78Q8430 Data Sheet
11 Line Interface Schematic
Figure 16 shows a typical analog line interface schematic (not all components are shown).
+3.3V
+3.3VA
Ferrite
10µF
0.1µF
0.1µF
0.1µF
VCC
VCCA
VCCA
VCCA
+3.3V
680Ω
680Ω
A
C
LED
LED
Link
LED0
LED1
A
C
Activity
78Q8430
Single Chip
10/100 Ethernet
MAC and PHY
+3.3VA
0.1µF
+3.3VA
0.1µF
50Ω
1:1
Transformer
50Ω
50Ω
50Ω
1
TXP
+3.3VA
2
3
TXN
RXP
RJ45
+3.3VA
6
RXN
0.1µ
0.1µ
F
F
XTLP
XTLN
GND
*
*
27pF
27pF
25. 000MHz
Parallel Resonant
*
Shunt capacitor value will vary depending on crystal capacitance.
Figure 16: Line Interface Schematic
Rev. 1.2
85