SC9148B View Datasheet(PDF) - Silan Microelectronics

Part Name

Description

Manufacturer

SC9148B

INFRARED REMOTE CONTROL TRANSMITTER USED TOGETHER WITH SC9149

Silan Microelectronics 

SC9148B

5. CODE BITS(C1,C2,C3)

Code bit can be made at one terminal with diodes connected through T1 ~ T3 timing terminals .

CODE BIT

C1

C2

C3

C2

1

0

0

1

1

1

C1,C2 IS FOR SC9150A

C2,C3 IS FOR SC9149A

CODE BIT “0”,”0”CAN NOT

BE USED

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)

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”

One word of the above transmission command is in the configuration of (010100100100).

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:2.1 2005.12.15

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