LTC1324
Single Supply LocalTalk
廬
Transceiver
FEATURES
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DESCRIPTION
The LTC
廬
1324 is a single 5V line transceiver designed to
operate on Apple
廬
LocalTalk networks. The driver features
a digitally selectable low slew rate mode for reduced EMI
emissions. The chip draws only 1mA quiescent current
when active and 1碌A(chǔ) 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
鹵10kV.
The LTC1324 is available in a 16-pin SO Wide package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Apple and LocalTalk are registered trademarks of Apple Computer, Inc.
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Single Chip 5V LocalTalk Port
Low Power: I
CC
= 1mA Typ
Shutdown Pin Reduces I
CC
to 1碌A(chǔ) Typ
Digitally Selectable Low Slew Rate Mode for
Reduced EMI Emmisions
Drivers Maintain High Impedance in Three-State or
with Power Off
Thermal Shutdown Protection
Drivers Are Short-Circuit Protected
APPLICATIONS
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LocalTalk Peripherals
Notebook and Palmtop Computers
Battery-Powered Systems
TYPICAL APPLICATION
Typical LocalTalk Connection for Low EMI
5V
16
SLEW RATE CONTROL
DATA IN
TX ENABLE
SHUTDOWN
RX ENABLE
DATA OUT
2
3
4
5
6
7
8
9
1324 TA01
Waveform of Driver
12
LocalTalk
TRANSFORMER
120鈩?/div>
D
IN
5V/DIV
11
LTC1324
10
D
OUT
1V/DIV
U
U
U
TIME (0.5碌s/DIV)
1324 TA02
1
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