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TOIM3232 Datasheet

  • TOIM3232

  • High-Performance gate array package using dual metal layer C...

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TOIM3232
Not for new designs
Vishay Telefunken
Integrated Interface Circuits
ULC Technology:
High-performance gate array package using dual metal layer CMOS technology,
featuring sub-micron channel length (0.8
m
m)
Description
The TOIM3232 IC provides proper pulse shaping for
the front end infrared transceivers of the 4000-series
(4000-series devices are infrared transceiver
compliant to the IrDA standard made by Vishay
Telefunken), as specified by the IrDA standard. In the
transmit mode, the TOIM3232 shortens the RS232
output signal to IrDA compatible electrical pulses to
drive the infrared. In the receive mode, the TOIM3232
stretches the received infrared pulses to the proper bit
width at the operating bit rate. The IrDA bit rate varies
between 2.4 kbit/s to 115.2 kbit/s.
The TOIM3232 is using a crystal clock 3.6864 MHz for
its pulse stretching and shortening. The clock can be
generated by the internal oscillator or an external clock
can be used, too. The TOIM3232 is programmable to
operate from 1200 bit/s to 115.2kbit/s by the
communication software through the RS232 port. The
output pulses are software programmable as either
1.627
m
s or 3/16 of bit time. The typical power
consumption is very low with about 10 mW in
operational state and in the order of a few microwatts
in standby mode.
Features
D
Pulse shaping function (shortening and stretching)
used in infrared IrDA standard applications
D
Programmable baud clock generator
D
D
(1200 Hz to 115 kHz), 13 baud rates
SO16L package
3 V and 5 V operation
Low operating current
D
Directly interfaces the infrared transceiver
TFDx4xxx series to RS232 port
Block Diagram
V
CC
TD_232
RD_232
Pulse
shaper
TD_IR
RD_IR
TD_LED
BR/D
Clock
generator
Logic
RD_LED
S1
S2
RESET
V
CC
_SD
Oscillator
GND
Figure 1. Block diagram
Document Number 82521
Rev. A1.1, 02-Apr-01
www.vishay.com
1 (9)

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