SC9244 查看數據表（PDF） - Silan Microelectronics

零件编号

产品描述 (功能)

生产厂家

SC9244

REMOTE CONTROL TRANSMITTER OF 9012 CODE FORMAT

Silan Microelectronics 

PIN CONFIGURATION

SC9244

PIN DESCRIPTIONS

Pin no.

SOP24 SOP20

1

1

2

2

3

3

4~11

4~11

12

12

15~16

17~20

22

23~24

--

14~17

18

19~20

Pin name

OSCI

OSCO

GND

PB0~PB7

IROUT

PA0~PA1

PA2~PA5

VDD

PA6~PA7

I/O

Functions

I Oscillator input pin

O Oscillator output pin

-- Ground

O Key scan signal output pin

O Infrared transmitting output pin

Key scan signal input pin, when in SOP20 package, do not

I

have these two pins

I Key scan signal input pin

-- Positive power supply

I Key scan signal input pin

FUNCTION DESCRIPTIONS

1. OSCILLATOR CIRCUIT

There is a ceramic oscillator between OSCI and OSCO, and a 100pF capacitor whose capacitance is 455KHz

between two oscillator pins and GND. To reduce the power dissipation, the oscillator circuit will work when press

the key, or else it stops. It can generate 38KHz carrier by internal frequency division.

FIR=455KHz/12=37.92KHz

Duty=1/3

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:1.0 2006.04.24

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