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RTL8139原理图

资料介绍
RTL8139cl_102_21

2

3

4

5

6

7

8

X1 C4 0.1U GND1 L4 BEAD 4 1 VCC OUT1 OUT2 GND 3 2

R14 CLKOUT 0

OSC 25MHz

VDD
A

VDD GND

Y1 XTALFB 25MHz CRYSTAL
A

BLOCK 1

C5 27pF GND

C6 27pF GND

BLOCK 2

*IF THE 25MHz CRYSTAL IS USED AS THE CLOCK SOURCE *IF THE 25MHz OSC IS USED AS THE CLOCK SOURCE, DISCARD BLOCK 2. *FOR EMI ISSUE, THE VALUE OF R14 CAN BE MODIFIED.

B

B

LED1 U3 15 C7 0.1U GND5 R15 50 R16 50 C8 0.1U GND5 LED0 LED2 GND 14 13 12 11 VDD U4 9 RXIN+ RXIN5 6 7 TXD3 1 TXD+ C9 15pF 2 RD+ RDCT TDCT TD+ PE-69012 CT TX+ TXRX+ RXCT 14 8 13 7 12 6 10 5 9 4 8 3 2 1 15pF VDD
C

TX+ TXGND N/C N/C VDD C_GND CC LED_ACT LED_LINK N/C N/C LED_100 RX+ RXJ-LAN
C

10

R17 50

R18 50

C10

R19 75

R20 75

R21 75

R22 75

CHASSIS_GND C12 C11 0.1U VDD VDD GND 0.01U/3KV

*C12 is added for ESD. It can be removed for ……
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RTL8139原理图
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