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C – WLN Ethernet Bridge

Page 48 Airborne Wireless LAN Node Module Data Book 100-8004-102G

Quatech, Inc. Confidential

Table 20. WLN Module Ethernet-Specific Pin Assignments

WLN

Signal

Ethernet

Signal

Direction Description

14 G4 RX- I Differential negative side input

13 G5 RX+ I Differential positive side input

32 E4 TXD+ O Differential positive side output with pre-emphasis

30 E5 TX+ O Differential positive side output

29 E6 TX- O Differential negative side output

31 E7 TXD- O Differential negative side output with pre-emphasis

I/O lines G4 and G5 are used as digital inputs and may not exceed 2.4V.

I/O lines E4 – E7 are used as digital outputs with outputs not exceeding 3.3V.

For proper interface with 10Base-T signals, it is recommended the I/O signals drive a

transformer/filter as indicated in the following schematic. The RJ-45F connector is for reference

and typically an embedded design will route the 10Base-T signals directly to the embedded host

Ethernet connections.

T1 – recommended transformer/filter: Halo FD02-114G

C1 – use lower voltage part when 10Base-T connections are not made to external connector.

Figure 19. Recommended Magnetics Schematic

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