LTC2873H 데이터 시트보기 (PDF) - Analog Devices

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LTC2873H

Single-Bus RS485/RS232 Multiprotocol Transceiver with Switchable Termination

Analog Devices 

BLOCK DIAGRAM

1.7V TO 5.5V

(≤ VCC)

SHDN

485/232

DE485/F232

RE485

TE485

LB

DI

0.1µF

VL

CONTROL

LOGIC

RT232

RT485

DRIVERS

232

485

LOOPBACK

PATH

RECEIVERS

3V TO 5.5V

10µH

2.2µF

VCC

220nF

SW

CAP

PULSE-SKIPPING

BOOST

REGULATOR

f = 1.2MHz

RT485

120Ω

125k

125k

232

RT232

5k

LTC2873

VDD

VEE

1µF

1µF

A/DO

B/RI

RO

485

GND

2873 BD

For more information www.analog.com

REV B

11

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