SC9148S View Datasheet(PDF) - Silan Microelectronics
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SC9148S Datasheet PDF : 9 Pages
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6.3 SINGLE-SHOT SIGNAL
SC9148B
When any one of the single-shot keys is depressed , the above single-shot signal is transmitted in 2 cycles,
and the transmitting output ends.
6.4 CONTINUOUS SIGNAL
When any one of the continuous keys is depressed, the above continuous signal is 2 cycles output, repeatedly
output 208a pause and 2 cycles is 2 pause of 208a.
6.5 CARRIER WAVE
About 50~100mA current is normally applied through an infrared LED in order to extend an infrared ray
reaching distance. Therefore, if a time, when LED is ON, is shortened as could as possible , it leads to reduction
in power consumption. On this IC, when single-shot or continuous signal is transmitting, each bit is switching by a
carrier of duty 1/3, output after the pulse modulated.
Carrier(fc) is decided by oscillation frequency fosc by means of XT and non-XT,
fc=fosc/12(Hz), fc=38kHz at fosc=455kHz.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.1 2005.12.15
Page 6 of 10
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