特性 Features

? Meet the Requirements of the EIA/TIA-485

Standards with 3.3V Power Supply and

Integrated Transient Voltage Suppressor

(TVS)

? TVS Protection for Bus Terminals :

±15 kV IEC 61000-4-2, Contact Discharge

±18 kV IEC 61000-4-2, Air-Gap Discharge

±15 kV EIA/JEDEC Human Body Model

? HBM ±8kV ESD Protection for all pins

? MM ±800V ESD Protection for all pins

? Latchup immunity up to ±400mA for all pins.

? High CDM protection up to ±1kV for all pins..

? Enhanced Slew-Rate Limiting Facilitates

Error-Free Data Transmission

? True Fail-Safe Receiver While Maintaining

EIA/TIA-485 Compatibility

? Hot-Swap Glitch free Protection on Control

Inputs

? Up to 256 Transceivers on the Bus

Applications

? Telecommunications Equipment

? Security System

? Industrial Control

? Building Automation Networks

描述 Description

The AZRS3072 is a ±15kV IEC 61000-4-2

contact discharge protected half-duplex RS485

transceiver IC, which contains one transmitter

and one receiver inside. This device is fully

compliant with the EIA/TIA-485 standard with

3.3V power supply.

The AZRS3072 features a fail-safe receiver,

which guarantees the output of the receiver to be

logic high when the differential inputs of the

receiver are open, short or idle conditions.

The AZRS3072 has a slew-rate-limited

transmitter to minimize EMI and reflection

caused by improperly cable terminated.

The AZRS3072 features a hot-swap glitch-free

which guarantees outputs of the transmitter and

the receiver in a high impedance state and even

no short current event during the power up period.

The AZRS3072 has the thermal shutdown and

the current limited function in the transmitter to

protect the device from damage by system fault

condition during normal operating condition. The

AZRS3072 is designed 1/8 unit load with

minimum 96kohm of input impedance, which can

connect 256 devices on a bus at least. The

AZRS3072 is also a high reliable device with

built-in system level ESD protected devices

against high-energy noise transients without

requiring any external components.