特性 Features

? Meet the Requirements of the EIA/TIA-485

Standards with 5V Power Supply

? Integrated Transient Voltage Suppressor (TVS)

? TVS Protection for Bus Terminals :

±30kV, IEC 61000-4-2, Contact/Air Discharge

±88A, IEC 61000-4-4, EFT (5/50ns)

±30A, IEC 61000-4-5, Surge (8/20μs)

? HBM ±15kV ESD Protection for all pins

? MM ±800V ESD Protection for all pins

? Latchup immunity up to ±400mA.

? High CDM protection up to ±2kV.

? True Fail-Safe Receiver While Maintaining

EIA/TIA-485 Compatibility

? Hot-Swap Glitch Protection on Control Inputs

? Controlled Transmitter Slew-Rate

? 1nA Low Shutdown Current

? Up to 256 Transceivers on the Bus

Applications

? Energy Meter Networks

? Motor Control

? Industrial Control

? Telecommunications Equipment

? Security System

? Building Automation Networks

描述 Description

The AZRS3082 is a ±30 kV IEC 61000-4-2

Contact/Air Discharge protected, half-duplex

transceiver which designed for RS-485 data bus

network with one transmitter and one receiver.

The AZRS3082 is fully compliant with the

EIA/TIA-485 standard under 5V supply. The

AZRS3082 features a fail-safe receiver, which

guarantees the output of receiver to logic high

when the receiver inputs are open, short or idle.

The AZRS3082 has a slew-rate-limited

transmitter to minimize EMI and reflection

caused by improperly cable terminated. The

transmission speed of AZRS3082 is up to

115kbps with error-free operation. For the glitch

free protection, hot-swap circuit of the AZRS3082

guarantees the outputs of both the transmitter

and the receiver in a high impedance state during

the power up period. Moreover, the transmitter of

the AZRS3082 has the thermal shutdown and the

current limited function to protect itself from

damage of the system fault conditions during

normal operation.