UNISONIC TECHNOLOGIES CO., LTD

UTRS485

CMOS IC

www.unisonic.com.tw

1 of 8

Copyright © 2017 Unisonic Technologies Co., Ltd

QW-R113-011.G

FAIL-SAFE, 500KBPS, RS-485 /

RS-422 TRANSCEIVERS WITH

±12KV ESD-PROTECTED



DESCRIPTION

The UTC UTRS485 is a half-duplex transceiver designed for

RS-485 data bus network, which contains one transmitter and one

receiver. The UTC UTRS485 features a fail-safe receiver, which

guarantees the receiver to output high when the receiver inputs are

open, short or idle.

The UTC UTRS485 also features a hot-swap glitch free protection

circuits which guarantee outputs of both the transmitter and the

receiver in a high impedance state during the power up period. So that

the large short current from power to ground will be disable by glitch

free function, which will save the power and enhance the efficiency of

the power up.

The UTC UTRS485 is optimized for signal rates up to 500kbps

with differential voltage of 2.3V. The UTC UTRS485 also has the

thermal shutdown function when the temperature is over 150

and

℃

the protection of the current limitation in the transmitter to protect the

itself from the damage by the system-fault conditions during normal

operation.



FEATURES

* Meet the requirements of the EIA/TIA-485 standards.

* 5.0V single power supply.

* 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.

* Driver short circuit current limit.

* Thermal shutdown for overload protection.



ORDERING INFORMATION

Ordering Number

Lead Free

Halogen Free

Package

Packing

UTRS485L-D08-T

UTRS485G-D08-T

DIP-8

Tube

UTRS485L-S08-R

UTRS485G-S08-R

SOP-8

Tape Reel