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TOIM3232 Datasheet(PDF) 1 Page - Vishay Telefunken

Part No. TOIM3232
Description  High-Performance gate array package using dual metal layer CMOS technology
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Maker  TFUNK [Vishay Telefunken]
Homepage  http://www.vishay.com
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TOIM3232
Vishay Telefunken
Not for new designs
Rev. A1.1, 02-Apr-01
1 (9)
www.vishay.com
Document Number 82521
Integrated Interface Circuits
ULC Technology:
High-performance gate array package using dual metal layer CMOS technology,
featuring sub-micron channel length (0.8
mm)
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
ms 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 Directly interfaces the infrared transceiver
TFDx4xxx series to RS232 port
D Programmable baud clock generator
(1200 Hz to 115 kHz), 13 baud rates
D SO16L package
D 3 V and 5 V operation
Low operating current
Block Diagram
Pulse
shaper
Clock
generator
Logic
Oscillator
TD_232
RD_232
BR/D
RESET
TD_IR
RD_IR
TD_LED
RD_LED
VCC_SD
S1
S2
VCC
GND
Figure 1. Block diagram




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