资料介绍
CS8900接口电路图10BASE-T WIRING
transformer
TXD+ TXDRt
50Ω 1%
68pF 0.01uF
1:1.414
TD+ TD-
RJ-45
1 2 RD+ 3 4 5 RD6 7 8
Rt
YL18-1064S
CS8900A
RXD+
Rr Rr 0.01uF
1:1
RXD-
For 3.3V operation the turns ratio on TX+ and TXD- is 1:2.5(transfomer:YL18-1080S),Rt is 8ohm for 100ohm cable and the 68pF cap changes to 560pF.
AUI WIRING
CS8900A DO+ TX DOYL18-1005D 1:1
transformer
1:1 3
DB15
10 4 2 9 1:1
CoI
CI+ CI-
39.2 ohm
0.01uF
39.2 ohm
RX
DI+
39.2 ohm
0.01uF
5 12 13 6 +12V
DI- 39.2
ohm
注:网络变压器 YL18-1080S,YL18-1064S,YL18-1005D 是裕泰电子公司的. 联系方式:0086-574-63620701 EMAIL:nico_yu@yeah.net