LTC491

12

491fa

©LINEAR TECHNOLOGY CORPORATION 1992

LT/TP 0104 1K REV A • PRINTED IN USA

RS232 Receiver

RS232 to RS485 Level Transistor with Hysteresis

TYPICAL APPLICATIO S

LTC491 • TA02

5.6k

RECEIVER

RS232 IN

1/2 LTC491

RX

120

Ω

DRIVER

Y

Z

R = 220k

10k

RS232 IN

5.6k

LTC491 • TA03

HYSTERESIS = 10k

Ω •

≈

1/2 LTC491

VY - VZ 

————

R

19k

————

R

RELATED PARTS

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

PART NUMBER

DESCRIPTION

COMMENTS

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LTC1483

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LTC1484

RS485 Transceiver with Fail-Safe

±15kV ESD, MSOP Package

LTC1485

10Mbps RS485 Transceiver

High Speed

LTC1518/LTC1519

52Mbps Quad RS485 Receivers

Higher Speed, LTC488/LTC489 Pin-Compatible

LTC1520

LVDS-Compatible Quad Receiver

100mV Threshold, Low Channel-to-Channel Skew

LTC1535

2500V Isolated RS485 Transceiver

Full-Duplex, Self-Powered Using External Transformer

LTC1685

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Industry-Standard Pinout, 500ps Propagation Delay Skew

LTC1686/LTC1687

52Mbps Full-Duplex RS485 Transceiver

LTC490/LTC491 Pin Compatible

LTC1688/LTC1689

100Mbps Quad RS485 Drivers

Highest Speed, LTC486/LTC487 Pin Compatible

LTC1690

Full-Duplex RS485 Transceiver with Fail-Safe

±15kV ESD, LTC490 Pin Compatible

LT1785/LTC1785A

±60V Protected RS485 Transceivers

±15kV ESD, Fail-Safe (LT1785A)

LT1791/LTC1791A

±60V Protected Full-Duplex RS485 Transceivers

±15kV ESD, Fail-Safe (LT1791A), LTC491 Pin Compatible