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TOIM4232 데이터시트 PDF




Vishay Siliconix에서 제조한 전자 부품 TOIM4232은 전자 산업 및 응용 분야에서
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부품번호 TOIM4232 기능
기능 SIR Endec for IrDA Applications Integrated Interface Circuit
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TOIM4232 데이터시트, 핀배열, 회로
VISHAY
SIR Endec for IrDA Applications
Integrated Interface Circuit
TOIM4232
Vishay Semiconductors
ULC Technology: High performance gate array
package using multiple metal layer CMOS technology
featuring sub-micron channel lengths (0.35 µm).
Description
The TOIM4232 Endec IC provides proper pulse shap-
ing 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 programma-
ble 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 con-
sumption is very low with about 10 mW in operational
state and in the order of a few microwatts in standby
mode.
18080
Features
• Pulse shaping function (shortening and stretching)
used in SIR IrDA® applications
• Directly interfaces the SIR transceiver TFD..-
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 select-
able
• SO16 - package
• 2.7 V to 3.6 V operation voltage, 5 V tolerant inputs
• Low operating current
Block Diagram
TD_232
RD_232
Vcc
Endec
TD_IR
RD_IR
BR/D
RESET
Baud
Generator
Logic
Osci llator
TD_LED
RD_LED
S1
S2
Vcc_SD
GND X1
X2
18079
Document Number 82546
Rev. 1.4, 01-Dec-03
www.vishay.com
1




TOIM4232 pdf, 반도체, 판매, 대치품
TOIM4232
Vishay Semiconductors
VISHAY
Parameter
Input leakage no pull-up/down
Output HIGH voltage
Output LOW voltage
Consumption current standby
Consumption current dynamic
Test Conditions
VIN = VDD or GND
IOH = - 2.0 mA
IOH = - 0.5 mA
IOL = + 2.0 mA
inputs grounded, no output load
VCC = 3.3 V, T = 25 °C
inputs grounded, no output load
VCC = 3.3 V, T = 25 °C
Symbol
IL
VOH
VOH
VOL
ISB
ICC
Min Typ. Max Unit
- 10 ± 1 10 µA
2.0 V
2.4 V
0.4 V
1 µA
2 mA
Operation Description
Figure 2 shows a typical example of an RS232 port
interface. The TOIM4232 connects to an RS232 level
converter on one side, and an infrared transceiver on
the other. The internal TOIM4232 baud rate generator
can be software controlled.
When BR/D = 0, the TOIM4232 interprets the chan-
nels TD_232 to TD_IR and RD_IR to RD_232 as data
channels.
On the other hand, whenever BR/D = 1, the
TOIM4232 interprets TD_232 as Control Word for
setting the Baud rate. The Baud rate can be pro-
grammed to operate from 1200 bit/s to 115.2 kbit/s.
As RS232 level converter, EIA232 or MAX232 or
equivalent are recommended.
When using the TOIM4232 directly connected to an
UART it is compatible to 5 V TTL and 3.3 V CMOS
logic.
Typical external resistors and capacitors are needed
as shown in the TFDx4xxx references.
The output pulse duration can also be programmed,
see chapter "Operation Description". It is strongly rec-
ommended using 1.627 µs output pulses to save bat-
tery power. As frequency determining component a
Vishay XT49M Crystal is recommended, when no
external clock is available.
We strongly recommend not to use this 3/16 mode
because 3/16 pulse length at lower bit rates con-
sumes more power than the shorter pulse. At a
data rate of 9600 bit/s, the ratio of power con-
sumption of both modes is a factor of 12 (!).
Programming the TOIM4232
For correct, data rate dependent timing the
TOIM4232 is using a built-in baud rate generator.
This is used when no external clock is not available as
in RS232 IR-dongle applications. For programming
the BR/D pin has to be set active, BR/D = 1.
In this case the TOIM4232 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 ("0") Set the
UART to 8 bit, no parity, 1 stop bit.
Control Byte (8 bit)
First Character
Second Character
X S2 S1 S0 B3 B2 B1 B0
LSB
X: Do not care
S1, S2: User programmble bit to program the outputs
S1 and S2
S0: Irda pulse select
S0 = (1): 1.627 µs pulses
S0 = (0): 3/16 bit time pulses, not recommended
B0 .. B3: Baud rate select words
Example:
To set TOIM4232 at COM2 port (2F8) to 9600 bit/s
with 3/16 bit time pulse duration send to the
TOIM4232 in programming mode in e.g. "Basic"
OUT &H2F8, (&H6)
For same port, 9600 bit/s and 1.627 µs pulse duration
send
OUT &H2F8, (&H16)
For additionally activating S1 send
OUT &H2F8, (&H36)
www.vishay.com
4
Document Number 82546
Rev. 1.4, 01-Dec-03

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TOIM4232 전자부품, 판매, 대치품
VISHAY
TOIM4232
Vishay Semiconductors
MAX3232CSE
1
+ C3
C+
3
C1-
U1
16
VCC
2
V+
4
+ C4
C2+
5
C2-
6
V-
GND
+
15
C6
C5
+
11
10 T1IN
12 T2IN
9 R1OUT
R2OUT
J1
1
6
2
7
3
8
4
9
5
CON9
RxD
DTS (BR/D)
TxD
DTS (Reset)
VCC
J2
ext.
input max
3,6V DC
1
2
CON2
T1OUT
T2OUT
R1IN
R2IN
14
7
13
8
R1
C1 + C2
C7
+
TOIMx232
1
Reset
2
BR/Data
3
RD 232
4
TD 232
5
Vcc SD
6
X1
7
X2
8
GND
U2 Vcc
RD IR
TD IR
S2
S1
NC
RD LED
TD LED
16
15
14
13
12
11
10
9
C11
C10
+
R3
TFDU4300
2
Cathode
1
Anode
4
RxD
6
VCC1
U4
3
TxD
5
SD
8
GND
7
Vlog
R4
opt.
Y1
Z2
R2
C8 C9
Application circuit using TFDU4300 with an integrated
level shifter MAX3232E. When used directly with
3 Vlogic, this one can be omitted
18240
Table 2.
Recommended Application Circuit Components
Component
Recommended Value
1 C1
100 nF
2 C2
10 µF, 16 V
3 C3
100 nF
4 C4
100 nF
5 C5
100 nF
6 C6
100 nF
7 C7
1 µF, 16 V
8 C8
22 pF
9 C9
22 pF
10 C10
6.8 µF, 16 V
11 C11
100 nF
12 Z2
3.6 V
13 R1
5.6 k
14 R2 100 k(up to 1 M, or omitted)
15 R3
47
16 R4
20
17 Y1
3.686400 MHz
18 U1
MAXIM MAX 3232E
19 U2
20 U3
21 J1
9 Pin - D-Sub
22 J2
Power connector
23 PCB
Document Number 82546
Rev. 1.4, 01-Dec-03
Vishay Part Number
VJ 1206 Y 104 J XXMT
293D106X9016B2T
VJ 1206 Y 104 J XXMT
VJ 1206 Y 104 J XXMT
VJ 1206 Y 104 J XXMT
VJ 1206 Y 104 J XXMT
293D105X9016A2T
VJ 1206 A 220 J XAMT
VJ 1206 A 220 J XAMT
293D 685X9 016B 2T
VJ 1206 Y 104 J XXMT
BZT55C3V6
CRCW-1206-5601-F-RT1
CRCW-1206-1003-F-RT1
CRCW-1206-47R0-F-RT1
CRCW-1206-20R0-F-RT1
XT49S - 20 - 3.686400M
TOIM4232
TFDU4300
Cannon
VISHAY Dongle_4
www.vishay.com
7

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부품번호상세설명 및 기능제조사
TOIM4232

SIR Endec for IrDA Applications Integrated Interface Circuit

Vishay Siliconix
Vishay Siliconix
TOIM4232

SIR Endec for IrDA Applications Integrated Interface Circuit

Vishay Siliconix
Vishay Siliconix

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