SC9314

SC9314 SILAN | Alldatasheet

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Technical content

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2001.04.15/G3

224 OTP ENCODER

DESCRIPTION

The SC9314 is CMOS LSI encoder designed for remote control system applications. It encodes 24 bits of information and then serially transmits it via the DOUT pin upon receipt of transmission enable (DATA pins: D0~D3) signals. The combination of address and bits of the SC9314 is designed by a one-time programmable process. The chip, in addition, offers various packaging for flexible combination of programmable address/data so as to meet various applications. Its programmable address/data is transmitted together with the anti-code bits via RF or infrared transmission medium upon receipt of a trigger signal.

FEATURES

• Operating voltage: 2V~12V * Low power consumption * Built-in oscillator needs only 5% resistor * 0/2/4/8 data selectable 24 maximum address and data codes * Easy interface with RF or IR medium * One-time programmable * Data active: D0~D3 * Minimal external components DIP-14 /G3

APPLICATIONS

• Burglar alarm system * Smoke and fire alarm system * Garage door controllers * Car door controllers * Security system * Cordless telephones * Other remote control systems PIN CONFIGURATION D OUT VDD NC VSS OSC2 OSC1 7 8 NC NC NC D3 D2 SC9314 NC

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2001.04.15/G3 BLOCK DIAGRAM Oscillator Address Counter Mixer & Driver Control Unit Data Latch D OUT OSC2 OSC1 Note: Address/Data number are available in various combinations, refer to functional description. ABSOLUTE MAXIMUM RATING Characteristic Symbol Value Unit Supply Voltage V DD 0.3~12 V Input Voltage V IN 0.3~ VDD +0.3 V Storage temperature T STG -50 ~ 125 °C Operating Temperature T OPR -20 ~ 70 °C ELECTRICAL CHARACTERISTICS (VDD =5.0V,TA=25°C )/G3 Test conditions Parameter Symbol VDD Condition Min Typ Max Unit Operating Voltage V DD 21 2 V Standby Current I STB 12V Oscillator stops 1 2 A Operating Current I DD 12V No load F OSC =3KHz 200 400 A H Input Voltage V IH 0.8 VDD VDD V L Input Voltage V IL 00 . 2 V DD V D0~D7 Pull-High Resistance R PH 12V 150 300 k 5V 0.9V DD 25 m ASource 12V 0.9V DD 6.5 15 mA 5V 0.1V DD 25 m A Output Current Sink IDOUT 12V 0.1V DD 61 5 m A Oscillator Frequency F OSC 12V R OSC =1.4M 3 kHz

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2001.04.15/G3 PIN DESCRIPTION Pin No. Symbol I/O Internal Connection Description 1~3 D0~D3 I CMOS IN Pull-High Data input and transmission enable (active low). They can be externally set to VSS or left open. 4V SS I Negative power supply (GND)

9 OSC2 O OSCILLATOR Oscillator output pin

10 OSC1 I OSCILLATOR Oscillator output pin

11 D OUT O CMOS OUT Data serial transmission output

12 V DD I Positive power supply

APPROXIMATE INTERNAL CONNECTION CIRCUIT CMOS IN/OUT CMOS OUT CMOS IN Pull-high OSCILLATOR FUNCTIONAL DESCRIPTION Normal operation The SC9314 encodes and transmits address/data to a decoder upon receipt of a trigger signal. The address codes of SC9314 are always being transmitted as long as power (VDD ) is supplied. The transmission function of the SC9314 is enabled by the D0~D3 pins (active low). The following is the transmission of the SC9314. Do~D3 Ebcider DOUT <1 word >1 word Transmission timing A complete code word of the SC9314 consists of 3 periods as shown below. FOSC D OUT 1c l o c k pilot period (23 clocks) 1/3 bit (A0~A19,60clocks) address code period (D3~D0, 12clocks) data code period 01 0 1 anti-code period (4 bits) A complete code word for the SC9314

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2001.04.15/G3 The SC9314 detects the logic state of the internal programmed address and the external data pins, and then transmits the detected information during the code period. Each address/data bit can be set to one of the following two logic states: FOSC address/ data bit Flowchart Power on Standby mode Transmission enabled? Address/data words transmitted Transmission still enabled? Address/data words transmitted continuously No No Yes Yes Yes

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2001.04.15/G3 TYPICAL APPLICATION CIRCUITS Tramsmitter Circuit 7 8 VSS NC NC NC D3 D2 D OUT VDD NC OSC2 OSC1 NC Rosc=1.4M/Ga1 12V LED SC9314 Note: In order to prevent the IC from being damaged owing to the latch up, the 100/Ga1resistor or the LED which also can be a transmission indicator is indispensable when VDD =9V~12V. Tramsmitter Circuit 7 8 VSS NC NC NC D3 D2 D OUT VDD NC OSC2 OSC1 NC Rosc=1.4M/Ga1 12V 100/Ga1 SC9314 0.1/Gad PACKAGE OUTLINE DIP-14-300-2.54 UNIT: mm 6.40 2.54 3.51 5.083.30 7.62 0.25 15 degree 0.46 19.4 1.50