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LTC1324

Single Supply LocalTalk

®

Transceiver

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Single Chip 5V LocalTalk Port

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s

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Digitally Selectable Low Slew Rate Mode for

Reduced EMI Emmisions

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Drivers Maintain High Impedance in Three-State or

with Power Off

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Thermal Shutdown Protection

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Drivers Are Short-Circuit Protected

The LTC

operate on Apple

a digitally selectable low slew rate mode for reduced EMI

emissions. The chip draws only 1mA quiescent current

when active and 1

µA in shutdown. The differential driver

outputs three-state when disabled, during shutdown or

when the power is off. The driver outputs will maintain

high impedance even with output common mode voltages

beyond the power supply rails. Both the driver outputs and

receiver inputs are protected against ESD damage to

±10kV.

The LTC1324 is available in a 16-pin SO Wide package.

FEATURES

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LocalTalk Peripherals

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Notebook and Palmtop Computers

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Battery-Powered Systems

, LTC and LT are registered trademarks of Linear Technology Corporation.

Apple and LocalTalk are registered trademarks of Apple Computer, Inc.

Waveform of Driver

Typical LocalTalk Connection for Low EMI

2

3

4

5

6

7

8

12

16

5V

LocalTalk

TRANSFORMER

11

10

9

LTC1324

SLEW RATE CONTROL

DATA IN

TX ENABLE

SHUTDOWN

RX ENABLE

DATA OUT

1324 TA01

120

Ω

TIME (0.5

µs/DIV)

1324 TA02

5V/DIV

1V/DIV