
TOIM4232
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Vishay Semiconductors
Rev. 2.2, 04-Jul-12
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc91000
1
Document Number: 82546
SIR Endec for IrDA
Applications Integrated Interface Circuit
DESCRIPTION
The TOIM4232 Endec IC provides proper pulse shaping for
the SIR IrDA
front end infrared transceivers as of the
4000-series. For transmitting the TOIM4232 shortens the
RS232 output signal to IrDA compatible electrical pulses to
drive the infrared transmitter. In the receive mode, the
TOIM4232 stretches the received infrared pulses to the
proper bit width depending on the operating bit rate. The
IrDA bit rate varies from 2.4 kbit/s to 115.2 kbit/s.The
TOIM4232 is using a crystal clock 3.6864 MHz for its pulse
stretching and shortening. The clock can be generated by
the internal oscillator. An external clock can be used, too.
The TOIM4232 is programmable to operate from 1200 bit/s
to 115.2 kbit/s by the communication software through the
RS232 port. The output pulses are software programmable
as either 1.627 μs 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.
ULC TECHNOLOGY
High performance gate array package using multiple metal
layer CMOS technology featuring sub-micron channel
lengths (0.35 μm).
FEATURES
Pulse
stretching) used in SIR IrDA applications
Directly interfaces the SIR transceiver TFD..-
and TFB..- series to an RS232 port
Programmable baud clock generator (1200 Hz
to 115.2 kHz), 13 baud rates
3/16 bit pulse duration or 1.627 μs pulse
selectable
SO16 - package
2.7 V to 3.6 V operation voltage, 5 V tolerant inputs
Low operating current
Qualified for lead (Pb)-free and Sn/Pb processing (MSL3)
Material categorization: For definitions of compliance
please see
www.vishay.com/doc99912
shaping
function
(shortening
and
18080
PARTS TABLE
PART
TOIM4232-TR3
DESCRIPTION
-
QTY/REEL
1500 pcs
PRODUCT SUMMARY
PART NUMBER
DATA RATE
(kbit/s)
DIMENSIONS
H x L x W
(mm x mm x mm)
4 x 4 x 0.75
LINK DISTANCE
(m)
OPERATING
VOLTAGE
(V)
2.7 to 3.6
IDLE SUPPLY
CURRENT
(mA)
2
TOIM4232
115.2
-