±60V Fault Tolerant 3.0V to 5.5V

TIA-485/TIA-422 Transceivers

XR

1/19

REV1A

FEATURES

■

■

3.0V to 5.5V operation

■

■

±60V fault tolerance on analog bus pins

■

■

Extended ±25V common mode operation

■

■

Robust ESD protection:

±15kV HBM (bus pins)

± 4kV HBM (non-bus pins)

■

■

1.65V to 5.5V logic Interface VL pin

(full-duplex package option)

■

■

Invert control to correct for reversed

bus pins

■

■

Enhanced receiver fail-safe protection for

open, shorted or terminated but idle

data lines

■

■

Hot swap glitch protection on DE and

RE

pins

■

■

Driver short-circuit current limit and

thermal shutdown for overload protection

■

■

Reduced unit loads allows up to 320

devices on bus

■

■

Industry standard 8 and 14-pin

NSOIC packages

■

■

-40°C to 85°C ambient operating

temperature range

APPLICATIONS

■

■

Industrial control networks

■

■

HVAC networks

■

■

Building and process automation

■

■

Remote utility meter reading

■

■

Energy monitoring and control

■

■

Long or unterminated transmission lines

Typical Application

Description

The XR33152, XR33156 and XR33158 family of high performance

TIA-485/TIA-422 devices are designed for improved performance

in noisy industrial environments and increased tolerance to system

faults.

The analog bus pins can withstand direct shorts up to ±60V and are

protected against ESD events up to ±15kV HBM. An extended ±25V

common mode operating range allows for more reliable operation in

noisy environments.

The receivers include full fail-safe circuitry, guaranteeing a logic

high receiver output when the receiver inputs are open, shorted

or undriven. The XR33152 receiver input impedance is at least

120kΩ (1/10 unit load), allowing more than 320 devices on the bus.

The XR33156/58 receiver input impedance is at least 30kΩ (1/2.5

unit load), allowing more than 80 devices on the bus.

The drivers are protected by short circuit detection as well as thermal

shutdown and maintain high impedance in shutdown or when powered

off. The XR33152 driver is slew limited for reduced EMI and error-free

communication over long or unterminated data cables.

The XR33152/56/58 family of high performance TIA-485/TIA-422

devices are designed for improved performance in noisy industrial

environments and increased tolerance to system faults.

The devices with DE and RE pins include hot swap circuitry to prevent

false transitions on the bus during power up or live insertion and can

enter a 1nA low current shutdown mode for extreme power savings.

Figure 1. Typical Application

V

CC

V

CC

5V

5V

DI

R

DE

RE

DI

DE

60V POWER BUS

FAULT TOLERANT UP TO 60V

R

RE