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PDF SC9148A Data sheet ( Hoja de datos )
| Número de pieza | SC9148A | |
| Descripción | FOR INFRARED REMOTE CONTROL TRANSMITTER | |
| Fabricantes | Silan Semiconductors | |
| Logotipo |  |
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SC9148A
FOR INFRARED REMOTE CONTROL
TRANSMITTER
DESCRIPTION
The SC9148A is CMOS LSI developed for use on the infrared
remote control transmitter. This LSI has 18 functions, and total 75
commands can be transimitted : 63 commands by the continuous
keys of multiple keyings is possible and 12 commands by the single
shot keys.
FEATURES
* Wide operating voltage range(VDD=2.2V ~ 5.0V)
* CMOS structure assures extremely low power dissipation
* Mulitiple keying is possible
* Less external parts
* Adaptable to other Models as Code Bits are available
* An oscillator can be constructed only by connecting an LC or
Ceramic Resonater as the oscillation circuit is housed.
ODERING INFORMATION
SC9148A
Advanced version. All functions same as SC9148. DIP-16 package.
SC9148S
Advanced version. SOP-16 package.
SOP-16
DIP-16
BLOCK DIAGRAM
XT 2
XT 3
OSC
Devider
GND
1
VDD
16
Decoder
Hold/Single pulse
signal generator
Output Synthesizing
Circuit
15
Tx
OUT
K1 4
K2 5 Key Input Circuit
K3 6
789
K4 K5 K6
Timing Signal
generating circuit
10 11 12
T1 T2 T3
14 TEST
Code Bit signal
Generating Circuit
13
CODE
1
1 page  
SC9148A
Data of C1 , C2 and C3 code bit become “1” when diodes are connected to CODE Terminal through Timing
Signal Terminals T1 ~T3, and ‘0’ when not connected . (In the above diagram , C1 , C2 and C3 are “1” , “1” and “1”
data . )
The SC9148P has 3 code bits . However , the SC9149P that is a receiving IC ( DIP 16 PIN ) and the SC9150P
(DIP 24 PIN ) are able to use only C2 and C3 , and C1 and C2 2 code bits , respectively .
Therefore , diodes must be connected so that code bit data of the SC9148P agreement with the receiving IC .
Note : For C3 and C1 code bit data not used on the SC9150P and SC9149P , it is necessary to transmit ‘1’ and
diodes must be so connected .
6. TRANSMITTING WAVEFORM
6.1 BASIC TRANSMITTING WAVEFORM (at fosc=455kHz)
C1~C3: CODE BIT READER
H,S1,S2: HOLD/SINGLE PULSE READER
K1~K6: KEY INPUT READER
C1 C2 C3 H S1 S2 K1 K2 K3 K4 K5 K6
a
3a
48a
Basic transmitting waveform is 12-bits serial data in configuration as shown above.
The time of each bit “ a” is decided as shown below by oscillation frequency fosc by means of XT and non-XT.
a=(1/fosc)×192(sec)
6.2 DISTINCTION OF BIT “0” AND “1”
a
BIT "0"
BIT "1"
0
3a
1
01
0 01
0 01
00
One word of the above transmission command is in the configuration of (010100100100).
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SC9148A.PDF ] | |
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