±15kV ESD-Protected, 32Mbps, 3V/5V,

Triple RS-422/RS-485 Receivers with Fault Detection

6

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PIN

NAME

FUNCTION

1

A

Noninverting Receiver A Input

2

A

Inverting Receiver A Input

3

B

Noninverting Receiver B Input

4

B

Inverting Receiver B Input

5

Z

Noninverting Receiver Z Input

6

Z

Inverting Receiver Z Input

7

GND

Ground

8

DELAY

Programmable Delay Terminal. Connect a capacitor from DELAY to GND to set the

ALARMD output delay time. To obtain a minimum delay, leave DELAY unconnected. See

Capacitance vs. ALARMD Output Delay in the Typical Operating Characteristics.

9

ALARMD

Delayed Fault Output. This output is the logic OR of ALARMA, ALARMB, and ALARMZ.

Place a capacitor from the DELAY pin to GND to set the delay (see Setting Delay Time). A

high logic level indicates a fault condition on at least one receiver input pair. A low level on

this pin indicates no fault condition is present.

10

OUTZ

be low. If Z or Z exceeds the receiver’s input common-mode voltage range, the ALARMZ

output will be high and OUTZ will be indeterminate.

11

ALARMZ

Z Fault Output. When ALARMZ is high, OUTZ is indeterminate. Tables 1 and 2 show all the

possible states for which an alarm is set.

12

OUTB

be low. If B or B exceeds the input receiver’s common-mode voltage range, the ALARMB

output will be high and OUTB will be indeterminate.

13

ALARMB

B Fault Output. When ALARMB is high, OUTB is indeterminate. Tables 1 and 2 show all the

possible states for which an alarm is set.

14

OUTA

be low. If A or A exceeds the receiver’s input common-mode voltage range, the ALARMA

output will be high and OUTA will be indeterminate.

15

ALARMA

A Fault Output. When ALARMA is high, OUTA is indeterminate. Tables 1 and 2 show all the

possible states for which an alarm is set.

16

Power Supply

Pin Description