toim5232 Vishay, toim5232 Datasheet

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toim5232

Manufacturer Part Number
toim5232
Description
Sir Endec For Irda? Applications Integrated Interface Circuit
Manufacturer
Vishay
Datasheet

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Part Number:
toim5232-TR3
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Part Number:
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DESCRIPTION
The TOIM5232 endec IC provides proper pulse shaping for
the SIR IrDA front end infrared transceivers as of the
4000-series.
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.
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).
Document Number: 81749
Rev. 1.2, 17-Nov-10
PARTS TABLE
PART
TOIM5232-TR3
PRODUCT SUMMARY
PART NUMBER
TOIM5232
SIR Endec for IrDA
irdasupportAM@vishay.com, irdasupportAP@vishay.com,
DATA RATE
1.2 to 115
(kbit/s)
For technical questions within your region, please contact one of the following:
20810
®
Applications Integrated Interface Circuit
(mm x mm x mm)
DIMENSIONS
4 x 4 x 0.75
H x L x W
DESCRIPTION
-
LINK DISTANCE
FEATURES
• Pulse shaping function according IrDA SIR
• Directly interfaces the SIR transceiver to a
• QFN-20 - package, 4 mm x 4 mm x 0.75 mm
• Low operating current
• Programmable baud clock generator (1200 Hz to
• 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
• Compliant to RoHS Directive 2002/95/EC and in
physical layer
RS232 port
115.2 kHz), 13 baud rates
(MSL3)
accordance to WEEE 2002/96/EC
(m)
-
irdasupportEU@vishay.com
OPERATING
Vishay Semiconductors
VOLTAGE
2.7 to 3.6
(V)
QTY/REEL
6000 pcs
TOIM5232
IDLE SUPPLY
CURRENT
www.vishay.com
(mA)
2
1

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toim5232 Summary of contents

Page 1

... The typical power consumption is very low with about 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 µ ...

Page 2

... V CC Resets all internal registers. Initially must be high (“1”) to reset internal registers. When high, the TOIM5232 sets the IrDA default bit rate of 9600 bit/s, sets pulse width to 1.627 µs. The V output is simply an inverted reset signal which allows shutdown of a TFDx4x00 CC_SD transceiver when applying the reset signal to the TOIM5232 ...

Page 3

... RS232 IR-dongle applications. For programming the BR/D pin has to be set active, BR this case the TOIM5232 interprets the 7 LSBs at the TD_232 input as a control word. The operating baud rate will change to its supposedly new baud rate when the BR/D returns back to low (“ ...

Page 4

... For proper operation, the RS232 must be programmed (using 8 bit, 1 stop, no parity) to send a two character control word, YZ. The control word YZ is composed of two characters, written in hexadecimal, in format: YZ. The transfer rate for programming must be identical with the formerly programmed data rate, or after resetting the TOIM5232, the default rate of 9600 bit/s is used. STEP. ...

Page 5

... RECOMMENDED APPLICATION CIRCUIT FOR TOIM5232 MAX3232CSE C1 C2 C2- GND 14 11 T1IN T1OUT 7 10 T2IN T2OUT 12 13 R1OUT R1IN 8 9 R2OUT R2IN RXD 2 RTS (BR/D) 7 TXD 3 8 DTR (RESET) 4 Vcc CON9 + External ...

Page 6

... TOIM5232 Vishay Semiconductors PACKAGE DIMENSIONS in millimeters 20797 REEL DIMENSIONS in millimeters Drawing-No.: 9.800-5090.01-4 Issue: 1; 29.11.05 14017 TAPE WIDTH A MAX. (mm) (mm) 12 330 www.vishay.com For technical questions within your region, please contact one of the following: 6 irdasupportAM@vishay.com, irdasupportAP@vishay.com, ® SIR Endec for IrDA Applications Integrated Interface Circuit ...

Page 7

... TAPE DIMENSIONS in millimeters 20798 Document Number: 81749 For technical questions within your region, please contact one of the following: irdasupportAM@vishay.com, irdasupportAP@vishay.com, Rev. 1.2, 17-Nov-10 ® SIR Endec for IrDA Applications Integrated Interface Circuit irdasupportEU@vishay.com TOIM5232 Vishay Semiconductors www.vishay.com 7 ...

Page 8

... BR/D, pin 2 (19) is set active high (BR/D = “1”). In this case the TOIM5232 interprets the 7 LSBs at the TD_232 input as a control word. The operating bit rate will change to its supposedly new rate when the BR/D returns back to low (“ ...

Page 9

... Vishay SIR transceivers, constant pulse duration. The endec stretches that to the correct bit time according the bit rate setting. This is shown in the following chapters. TOIM5232 Vishay Semiconductors 1) Ch1: BR/D; pin 2, vertical scale: 2 V/div., horizontal scale: 200 µs/div. 2) Ch2: TD_232; pin 4; programming sequence ...

Page 10

... TOIM5232 Vishay Semiconductors TRANSMIT (TXD) CHANNEL Figure 4 shows the transmission in the default mode. For data transfer, the endec is set to that mode by BR/D = “0”. In the examples “6” is always transmitted (binary “00000110”). The “0” is represented in the IrDA protocol by an optical pulse. Also here the LSB is transmitted first after the start bit. “ ...

Page 11

... RD_232 TD_IR NO_2 4 13 TD_232 Vcc_SD S1 INS1 DG2039 RD_LED 8 9 GND TD_LED *) For TOIM5232 pinning, see figure irdasupportEU@vishay.com TOIM5232 Vishay Semiconductors R4 R3 optional C11 TFDU4300 C10 TFDU4101 Cathode Anode COM_1 ...

Page 12

... The default mode is echo-off. To enable the echo set inactive/low. (See the chapter for programming the TOIM4232, TOIM5232). The oscilloscope diagrams are shown in figure 11. Channel 2 shows the echo signal on the RXD output of the ...

Page 13

... Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications their own risk and agree to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay or its distributor was negligent regarding the design or manufacture of the part ...

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