DS75176 National Semiconductor, DS75176 Datasheet

DS75176

Manufacturer Part Number

DS75176

Description

Multipoint RS-485/RS-422 Transceivers

Manufacturer

National Semiconductor

Datasheet

1.DS75176.pdf (8 pages)

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Download datasheet (210Kb)

DS75176B/DS75176BT

Multipoint RS-485/RS-422 Transceivers

General Description

The DS75176B is a high speed differential TRI-STATE

bus/line transceiver designed to meet the requirements of

EIA standard RS485 with extended common mode range

(+12V to −7V), for multipoint data transmission. In addition, it

is compatible with RS-422.

The driver and receiver outputs feature TRI-STATE capabil-

ity, for the driver outputs over the entire common mode

range of +12V to −7V. Bus contention or fault situations that

cause excessive power dissipation within the device are

handled by a thermal shutdown circuit, which forces the

driver outputs into the high impedance state.

DC specifications are guaranteed over the 0 to 70˚C tem-

perature and 4.75V to 5.25V supply voltage range.

Connection and Logic Diagram

TRI-STATE

is a registered trademark of National Semiconductor Corp.

Order Number DS75176BN, DS75176BTN, DS75176BM or DS75176BTM

DS008759

See NS Package Number N08E or M08A

Top View

Features

n Meets EIA standard RS485 for multipoint bus

n Small Outline (SO) Package option available for

n 22 ns driver propagation delays.

n Single +5V supply.

n −7V to +12V bus common mode range permits

n Thermal shutdown protection.

n High impedance to bus with driver in TRI-STATE or with

n Pin out compatible with DS3695/A and SN75176A/B.

n Combined impedance of a driver output and receiver

n 70 mV typical receiver hysteresis.

transmission and is compatible with RS-422.

minimum board space.

ground difference between devices on the bus.

power off, over the entire common mode range allows

the unused devices on the bus to be powered down.

input is less than one RS485 unit load, allowing up to 32

transceivers on the bus.

DS008759-1

www.national.com

July 1998

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