4

LTC1320

RXEN (Pin 5): Receiver Enable (TTL Compatible). A high

level on this pin disables the receivers and three-states the

logic outputs; a low level allows normal operation. To

prevent erratic behavior at the receiver outputs during

shutdown, RXEN should be pulled high along with SD.

RXO (Pin 6): Inverting RS562 Single-Ended Receiver

Output.

RXO (Pin 7): Noninverting RS562 Single-Ended Receiver

Output.

RXDO (Pin 8): RS422 Differential Receiver Output.

GND (Pin 9): Ground Pin.

Input. When this pin is

be high; when this pin is

be low.

Input.

PI FU CTIO S

TEST CIRCUITS

RXI (Pin 12): Noninverting RS562 Receiver Input. This

input controls the RXO output; it has no effect on the RXO

output.

RXI (Pin 13): Inverting RS562 Receiver Input. This input

controls the RXO output; it has no effect on the RXO

output.

voltage on this pin must never exceed ground on power up

or power-down.

TXO (Pin 15): RS562 Single-Ended Driver Output.

Output.

OUTPUT

UNDER TEST

500

Ω

LTC1320 • F03

Figure 3

TXD

LTC1320 • TCF02

Figure 2

OUTPUT

UNDER TEST

LTC1320 • F04

500

Ω

Figure 4

OUTPUT

UNDER TEST

LTC1320 • F07

500

Ω

Figure 7

LTC1320 • F05

TXO

TXI

Figure 5

OUTPUT

UNDER TEST

500

Ω

LTC1320 • F06

Figure 6

TXD

LTC1320 • F01

+

–

Figure 1