11

LTC491

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

S

APPLICATI

TYPICAL

RS232 Receiver

LTC491 • TA18

5.6k

Ω

RECEIVER

RS232 IN

1/2 LTC491

RX

RS232 to RS485 Level Transistor with Hysteresis

120

Ω

DRIVER

Y

Z

R = 220k

Ω

10k

Ω

RS232 IN

5.6k

Ω

LTC491 • TA19

HYSTERESIS = 10k

Ω •

≈

1/2 LTC491

VY - VZ 

————

R

19k

————

R