Features

 Integrated Transient Voltage Suppressor

(TVS) in the Transceiver IC

 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.

 Meet the Requirements of the EIA/TIA-485

Standards with 3.3V Power Supply

 True Fail-Safe Receiver While Maintaining

EIA/TIA-485 Compatibility

 Data Rate up to 16Mbps

 Hot-Swap Glitch free Protection on Control

Inputs

 Up to 256 Transceivers on the Bus

Applications

 Telecommunications Equipment

 Security System

 Building Automation Networks

Description

The AZRS3078 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 AZRS3078 features a fail-safe receiver,

which guarantees the output of the receiver to be

logic high when the differential inputs (bus pins, A

and B) of the receiver are open, short or idle

under abnormal operating conditions.

The AZRS3078 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 AZRS3078 has the thermal shutdown and

the current limited function in the transmitter to

protect the device from damage by system fault

conditions during normal operating condition.

The AZRS3078 is designed 1/8 unit load with

minimum 96kohm of input impedance, which can

connect 256 devices on a bus at least. The

AZRS3078 is also a high reliable device with

built-in system level ESD protected devices

against high-energy noise transients without

requiring any external components.