TNETEL1400 datasheet(6/15 Pages) TI

6 / 15 page

TNETEL1400

EtherLoop

™ TRANSCEIVER

SPHS004A – FEBRUARY 1999 – REVISED MARCH 1999

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Terminal Functions (Continued)

receive (RX)

TERMINAL

I/O†

DESCRIPTION

NAME

NO.

I/O†

DESCRIPTION

RX_TERM

Receive passive termination

RX_TERM = 1: 110

Ω switched IN

RX_TERM = 0: 110

Ω switched OUT

RXBIAS

Receive current bias

RXGAIN2

RXGAIN1

RXGAIN0

29 (MSB)

28 (LSB)

Receive gain select

000 = RX OFF

•

011 = RX OFF

100 = 0 dB

101 = 12 dB

110 = 24 dB

111 = 30 dB

RXIN

Receiver input negative/TX feedback

RXIP

Receiver input positive/TX feedback

RXOUT

Receiver output (single ended)

† I = input, O = output

miscellaneous

TERMINAL

I/O†

DESCRIPTION

NAME

NO.

I/O†

DESCRIPTION

ANG

Analog ground (2.5 V) reference

REFP

4-V bandgap reference

REMN

I/O

Negative external emitter resistor

REMP

I/O

Positive external emitter resistor

† I = input, O = output

power supply

TERMINAL

DESCRIPTION

NAME

NO.

DESCRIPTION

8, 11, 32, 33, 38, 41

Not used

VCC

15, 34, 43

5-V power

VEE

1, 12, 13, 14, 24, 25, 35, 36, 37, 42, 48

Ground

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