1. Specification requirements:

A、 Equipped with 3 channels of 10/100BAST-T (X) adaptive network ports;

B、 Equipped with a built-in network isolation transformer and a 2.00mm dual row plug interface;

C、 Power input: DC3.3V/1A, input from the power pin;

D、 Power consumption: Full load power consumption not exceeding 2W;

E、 Forwarding mechanism: store and forward mechanism, line speed performance;

F、 Equipped with network line sequence automatic crossover function (MDI/MDIX);

G、 Working temperature: -40 ° C~75 ° C;

H、 Management attribute: Non network management type;

2. Scheme selection

5-port 100Mbps switching chip, with 3 network ports and pin out configuration;

3. Module production process

A、 4-layer PCB board, FR-4 high TG board, board thickness 1.6mm;

B、 Gold deposition on solder pads, green oil coverage on via holes;

C、 The power and network data interfaces are connected to the motherboard using gold-plated pins;

4. Pin definition

Power pin: as shown in the diagram:

Among them, 1, 2, 3, and 4 are power grounds5. 6, 7, and 8 are 3.3V power supplies

3-channel network port pins: as shown in the diagram:

21. Send signal P1_TX0 via twisted pair cable at the entrance of the first road network+

22. Send signal P1_TX0 via twisted pair cable at the entrance of the first road network-

17. The twisted pair receiving signal P1_SX1 at the entrance of the first road network+

18. The twisted pair receiving signal P1_SX1 at the entrance of the first road network-

13. Send signal P2_TX0 via twisted pair cable at the entrance of the second road network+

14. Send signal P2_TX0 via twisted pair cable at the entrance of the second road network-

9. Second road network entrance twisted pair receiving signal P2_SX1+

10. Second road network entrance twisted pair receiving signal P2_SX1-

5. Send signal P3_TX0 via twisted pair cable at the 3rd road network entrance+

6. Send signal P3_TX0 via twisted pair cable at the 3rd road network entrance-

1. The twisted pair receiving signal P3_SX1 at the 3rd road network entrance+

2. The twisted pair receiving signal P3_SX1 at the 3rd road network entrance-