TOIM5232

www.vishay.com

Vishay Semiconductors

Rev. 1.3, 04-Jul-12

1

Document Number: 81749

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DESCRIPTION

The TOIM5232 endec IC provides proper pulse shaping for

the SIR IrDA front end infrared transceivers as of the

4000-series.

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For transmitting the TOIM5232 shortens the RS232 output

signal to IrDA compatible electrical pulses to drive the

infrared transmitter. In the receive mode, the TOIM5232

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.

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The TOIM5232 is using a crystal clock 3.6864 MHz

(< 7.5 MHz) for its pulse stretching and shortening. The

clock is generated by the internal oscillator. An external

clock can be used, too. The TOIM5232 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. TOIM5232 in the tiny

QFN-20 package is the space-minimized version of

TOIM5232.

ULC Technology: High performance gate array package

using multiple metal layer CMOS technology featuring

sub-micron channel lengths (0.35 μm).

FEATURES

• Pulse shaping function according IrDA SIR

physical layer

• Directly interfaces the SIR transceiver to a

RS232 port

• QFN-20 - package, 4 mm x 4 mm x 0.75 mm

• Low operating current

• Programmable baud clock generator (1200 Hz

to

115.2 kHz), 13 baud rates

• 3/16 bit pulse duration or 1.627 μs pulse selectable

• For 2.7 V to 3.6 V operation voltage, 5 V tolerant inputs

• Qualified for lead (Pb)-free and Sn/Pb solder processing

(MSL3)

• Material categorization: For definitions of compliance

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20810

PARTS TABLE

PART

DESCRIPTION

QTY/REEL

TOIM5232-TR3

SIR Endec for IrDA application

6000 pcs

PRODUCT SUMMARY

PART NUMBER

DATA RATE

(kbit/s)

DIMENSIONS

H x L x W

(mm x mm x mm)

LINK DISTANCE

(m)

OPERATING

VOLTAGE

(V)

IDLE SUPPLY

CURRENT

(mA)

TOIM5232

1.2 to 115

4 x 4 x 0.75

-

2.7 to 3.6

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