TOIM4232-TR3 Vishay, TOIM4232-TR3 Datasheet - Page 13

• 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

X: do not care
S1, S2: user-programmable bit to program the outputs S1
and S2. In the example, S1 is set active, and S2 is inactive.
S0: IrDA pulse select
S0 = (1): 1.627 µs output
S0 = (0): 3/16 bit time pulses, not recommended
B0 to B3: baud rate select words according to the following
table 2 below.
Bold: see example
Note
•
Document Number: 82546
Rev. 2.1, 17-Nov-10
MSB
STA
TABLE 1 - CONTROL BYTE (8 BIT)
TABLE 2 - TRANSMISSION RATE SELECT
WORDS
In the oscilloscope that will be shown in the reserved order with
X
0
0
0
IrDA standard only supports 2.4 kbit/s, 9.6 kbit/s, 19.2 kbit/s,
57.6 kbit/s, and 115.2 kbit/s (3.6864 MHz clock). Doubling the
baud rates is permissible by doubling the clock frequency.
B3
0
0
0
0
0
0
0
0
1
1
1
1
1
FIRST CHARACTER
LSB
S2
B0
0
1
FIRST CHARACTER
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
S1
B1
1
0
B1
LSB first, see figure 5.
0
0
1
1
0
0
1
1
0
0
1
1
0
S0
B2
1
1
[e-mail], [e-mail],
Example
Example
B0
B3
B3
For technical questions within your region, please contact one of the following:
0
1
0
1
0
1
0
1
0
1
0
1
0
SECOND CHARACTER
0
0
B2
S0
SECOND CHARACTER
HEX
1
1
C
0
1
2
3
4
5
6
7
8
9
A
B
SIR Endec for IrDA
B1
S1
0
1
Integrated Interface Circuit
BIT RATE
115.2 kHz
57.6 kHz
38.4 kHz
19.2 kHz
14.4 kHz
12.8 kHz
9.6 kHz
7.2 kHz
4.8 kHz
3.6 kHz
2.4 kHz
1.8 kHz
1.2 kHz
LSB
B0
S2
1
0
MSB
STA
X
0
0
0
®
In figure 5 the programming sequence is shown for a bit rate
of 12.8 kbit/s.
12.8 kbit/s as in figure 5 but with a 3/16 bit pulse duration (S0 = “0”).
When correctly programmed, the endec shortens the pulse
to be transmitted from the full bit duration to either 3/16 of the
bit length or to 1.627 µs (which is 3/16 of the 115.2 kbit/s bit
duration).
recommended.
The received optical pulse shows in case of most of the
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.
sequence with the control byte (Ch2) is applied to TD_232, pin 4.
1->
2->
MSB
1->
2->
Applications
0
Programming sequence for setting the endec to a bit rate of
Programming sequence for setting the endec to a bit rate of
12.8 kbit/s. After setting BR/D high (Ch1), the programming
21038
21030
1) Ch1: BR/D; pin 2, vertical scale: 2 V/div., horizontal scale: 200 µs/div.
2) Ch2: TD_232; pin 4; programming sequence
1) Ch1: BR/D, pin 2, vertical scale: 2 V/div.,
2) Ch2: TD_232, pin 4; programming sequence
0
[e-mail]
horizontal scale: 200 µs/div.
For
1
power
STA 1
0
Vishay Semiconductors
EXAMPLE
0
Fig. 5 -
Fig. 6 -
saving,
1
0
0
0
1
the
1
0
TOIM4232
short
0
0
www.vishay.com
LSB
1
pulse
STA
0
13
is