3

ML4642

PIN DESCRIPTIONS

PIN NO.

NAME

FUNCTION

DESCRIPTION

1

RXLED/LPBK/SQE

I/O

Active low receive LED driver for MAU port. If tied to ground, this pin

enables internal loopback of the active TXIN pair to the RXOUT pairs

and enables SQE test. If tied to 0.6 volts internal loopback is enable but

SQE test is disabled. SQE and loopback are disabled when this pin is

pulled high.

2

RXINP

Input

Receive signal pair for MAU port.

3

RXINN

Onput

Receive signal pair for MAU port.

4

JAB1/JDIS

I/O

Active low jabber LED driver for DTE port 1. If tied to ground, the

jabber function is disabled at TXIN1 and TXIN2.

5

RRSET

Input

Bias setting external resistor, 61.9Ký.

Power

+5 volt power supply

7

TXOUTP

Output

Transmit signal pair for MAU port.

8

TXOUTN

Output

Transmit signal pair for MAU port.

9

TXLED1

Output

Open collector, active low transmit LED driver for DTE AUI port 1.

10

TXLED2

Output

Open collector, active low transmit LED driver for DTE AUI port 2.

11

TXIN2P

Input

Transmit signal pair for DTE port 2.

12

TXIN2N

Input

Transmit signal pair for DTE port 2.

13

TXIN1P

Input

Transmit signal pair for DTE port 1.

14

TXIN1N

Input

Transmit signal pair for DTE port 1.

15

Power

+5 volt power supply

16

CDOUT2N

Output

Collision signal pair for DTE port 2.

17

CDOUT2P

Output

Collision signal pair for DTE port 2.

18

CDLED

Output

Open collector, active low collision LED driver.

19

CDINN

Input

Collision signal pair for MAU port.

20

CDINP

Input

Collision signal pair for MAU port.

21

JAB2

Output

Open collector, active low jabber LED driver for DTE port 2.

22

CDOUT1P

Output

Collision signal pair for DTE port 1.

23

CDOUT1N

Output

Collision signal pair for DTE port 1.

24

GND

Ground

GND.

25

RXOUT2P

Output

Receive signal pair for DTE port 2.

26

RXOUT2N

Output

Receive signal pair for DTE port 2.

27

RXOUT1N

Output

Receive signal pair for DTE port 1.

28

RXOUT1P

Output

Receive signal pair for DTE port 1.