±60V Fault Tolerant 3.0V to 5.5V

RS-485/RS-422 Transceivers

XR

1/18

REV2A

Description

The XR33052, XR33053, XR33055, and XR33058 (XR3305x) are

a family of high performance RS-485/RS-422 devices 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 XR3305x receivers include full fail-safe circuitry, guaranteeing a

logic-high receiver output when the receiver inputs are open, shorted

or undriven. The XR33052/53/55 receiver input impedance is at least

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

The XR33058 receiver input impedance is at least 30KΩ (1/2.5 unit

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

The driver is protected by short circuit detection as well as thermal

shutdown and maintains high impedance in shutdown or when

powered off.

The 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.

The XR33052/55/58 are half-duplex transceivers offered in an

8-pin NSOIC package and operates at a maximum data rates of 250k,

1M and 20Mbps. The XR33053 is a full-duplex transceiver offered in a

14-pin NSOIC package and operates at a maximum data rate of

1 Mbps.

Typical Application

FEATURES

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■

3.0V to 5.5V operation

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■

±60V fault tolerance on analog bus pins

■

■

Extended ±25V common mode operation

■

■

Robust ESD protection:

±15kV HBM (bus pins)

±4kV HBM (non-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-pin and 14-pin

NSOIC packages

■

■

-40°C to 85°C and -40°C to 105°C ambient

operating temperature ranges

APPLICATIONS

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■

Industrial control networks

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■

HVAC networks

■

■

Building and process automation

■

■

Remote utility meter reading

■

■

Energy monitoring and control

■

■

Long or unterminated transmission lines

Figure 1. Typical Application

5V

DI

DE

60V POWER BUS

FAULT TOLERANT UP TO 60V

120Ω

120Ω

5V

R

RE

DI

DE

R

RE