TOIM4232-TR3 Vishay, TOIM4232-TR3 Datasheet - Page 2

• Manufacturer Part Number: TOIM4232-TR3
• Description: IC SIR ENDEC IRDA 115.2K 16-SOIC
• Manufacturer: Vishay
• Type: Infrared Encoder/Decoderr

Specifications of TOIM4232-TR3

• Voltage - Supply, Analog: 2.7 V ~ 3.6 V
• Voltage - Supply, Digital: 2.7 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Data Transmission Rate: 2.4 Kbits/s to 115.2 Kbits/s
• Mounting Style: SMD/SMT
• Operating Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Ic Function: SIR Endec For IrDA Application
• Brief Features: Pulse Shaping Function, Programmable Baud Clock Generator, Low Operating Current
• Supply Voltage Range: 2.7V To 3.6V
• Operating Temperature (min): -25C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 85C
• Package Type: SOIC
• Rad Hardened: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 751-1200-2

TOIM4232
Vishay Semiconductors
BLOCK DIAGRAM
Notes
(1)
(2)
www.vishay.com
2
PIN NUMBER SYMBOL
PIN DESCRIPTION
Crystal should be connected as shown in figure 2. In addition connect a 100 k resistor from pin 6 to pin 7 and from pin 6 and pin 7 a 22 pF
capacitor to ground, respectively. When an external clock is available connect it to pin 6 leaving pin 7 open. The external resistor of 100 k
is used to accelerate the start of oscillation after reset or power - on. The value depends on the “Q” of the resonator. With low Q resonators
it is not necessary. The start - up time of the oscillator is between 30 µs (with piezo resonators) and above 2 ms with high Q quartzes.
All Vishay Semiconductor SIR transceivers fulfill this condition.
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
RD_LED
TD_LED
RD_232
V
TD_232
RESET
TD_IR
RD_IR
BR/D
CC
GND
VCC
NC
X1
X2
S1
S2
_SD
[e-mail], [e-mail],
Resets all internal registers. Initially must be high (“1”) to reset internal registers. When high, the
TOIM4232 sets the IrDA default bit rate of 9600 bit/s, sets pulse width to 1.627 µs. The V
TFDU4203, the reset line can be used directly as shut down signal. RESET pin can be controlled
RS232 TXD data line is connected (via a level shifter) to TD_232 input pin. The TXD - signal is
Input of the signal to be transmitted from the RS232 port TXD line (passing the level converter).
Outputs an inverted RESET signal. Can be used to shut down the power supply of a 4000 series
transceiver (e.g., TFDU4100). V
Transmit LED indicator driver. Use 180  current limiting resistor in series to LED to connect to
Receive LED indicator driver. Use 180  current limiting resistor in series to LED to connect to
Received signal data output of stretched signal to the RS232 RXD line (using level converter).
output is simply an inverted reset signal which allows to shut down of a TFDx4x00 transceiver
by either the RTS or DTR line through RS232 level converter. Minimum hold time for resetting
Data received from the RS232 port is interpreted as control word. The control word programs
User programmable bit. Can be used to turn on/off a front-end infrared transceiver (e.g., an
User programmable bit. Can be used to turn on/off a front-end infrared transceiver (e.g., an
when applying the reset signal to the TOIM4232. When using devices with external SD like
transceiver. The RXD line of the transceiver is connected to the RD_IR input. This signal is
stretched to the correct bit length according to the programmed bit rate and is routed to the
appropriately shortened and applied to the output TD_IR, driving the TXD input of the IR
For technical questions within your region, please contact one of the following:
Data input from the infrared transceiver, min. pulse duration 1.63 µs
a transceiver (e.g., TFDx4xxx). Output polarity: Inverted RESET input.
Ground in common with the RS232 port and IrDA transceiver ground
the baud rate width will be effective as soon as BR/D return to low.
Crystal input clock, 3.6864 MHz nominal. Input for external clock
TD_232
RD_232
RESET
SIR Endec for IrDA
BR/D
Data output of shortened signal to the infrared transceiver
Integrated Interface Circuit
GND
is 1 µs. Disables the oscillator when active.
BR/D = 0, data communication mode:
infrared module at the adapter back)
infrared module at the adapter front)
RS232 RXD line at the RD_232 pin.
X1
BR/D = 1, programming mode:
Baud
generator
CC
Logic
Endec
Oscillator
shutdown output function. This pin can be used to shut down
Baud rate control/ data.
V
CC
V
V
DESCRIPTION
CC
CC
Supply voltage
No connection
X2
. (V
. (V
Crystal
CC
CC
®
TD_IR
RD_IR
V
TD_LED
RD_LED
S1
S2
CC_SD
= 3.3 V)
= 3.3 V)
Applications
(1)
18079
[e-mail]
(1)
(2)
CC
Document Number: 82546
_SD
Rev. 2.1, 17-Nov-10
I/O
O
O
O
O
O
O
O
I
I
I
I
I
ACTIVE
High
High
High
High
Low
Low
Low
Low
Low
Low