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| Silan Semiconductors 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. SC9314 DIP-14 FEATURES * Operating voltage: 2V~12V * Low power consumption * Built-in oscillator needs only 5% resistor * 0/2/4/8 data selectable * 2 maximum address and data codes * Easy interface with RF or IR medium * One-time programmable * Data active: D0~D3 * Minimal external components 24 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 D3 1 VSS 2 SC9314 OSC1 3 OSC2 4 DOUT 5 NC 6 NC 7 14 D2 13 D1 12 D0 11 VDD 10 NC 9 NC 8 NC HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2001.04.15 1 Silan Semiconductors BLOCK DIAGRAM OSC1 Oscillator OSC2 Address Counter SC9314 Mixer & Driver DOUT Control Unit Data Latch D0 D3 Note: Address/Data number are available in various combinations, refer to functional description. ABSOLUTE MAXIMUM RATING Characteristic Supply Voltage Input Voltage Storage temperature Operating Temperature Symbol VDD VIN TSTG TOPR Value 0.3~12 0.3~ VDD +0.3 -50 ~ 125 -20 ~ 70 Unit V V C C ELECTRICAL CHARACTERISTICS (VDD =5.0V, TA=25C) Parameter Operating Voltage Standby Current Operating Current H Input Voltage L Input Voltage D0~D7 Pull-High Resistance Source Output Current Sink Oscillator Frequency FOSC IDOUT Symbol VDD ISTB IDD VIH VIL RPH Test conditions VDD 12V 12V Condition Oscillator stops No load FOSC=3KHz Min 2 Typ Max 12 Unit V A A V V k mA mA mA mA kHz 1 200 0.8 VDD 0 2 400 VDD 0.2VDD 12V 5V 12V 5V 12V 12V 0.9VDD 0.9VDD 0.1VDD 0.1VDD ROSC=1.4M 2 6.5 2 6 150 5 15 5 15 3 300 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2001.04.15 2 Silan Semiconductors PIN DESCRIPTION Pin No. 14 1~3 4 9 10 11 12 SC9314 Description Data input and transmission enable (active low). They can be externally set to VSS or left open. Negative power supply (GND) Symbol D0~D3 VSS OSC2 OSC1 DOUT VDD I/O I I O I O I Internal Connection CMOS IN Pull-High OSCILLATOR OSCILLATOR CMOS OUT Oscillator output pin Oscillator output pin Data serial transmission output 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 <1 word Ebcider DOUT Transmission timing A complete code word of the SC9314 consists of 3 periods as shown below. >1 word FOSC 1 clock DOUT pilot period (23 clocks) 1/3 bit (A0~A19,60clocks) address code period (D3~D0, 12clocks) data code period 0 1 0 1 anti-code period (4 bits) A complete code word for the SC9314 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2001.04.15 3 Silan Semiconductors SC9314 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 1 0 address/ data bit Flowchart Power on Standby mode Yes No Transmission enabled? Yes Address/data words transmitted No Transmission still enabled? Yes Address/data words transmitted continuously HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2001.04.15 4 Silan Semiconductors TYPICAL APPLICATION CIRCUITS SC9314 Tramsmitter Circuit Tramsmitter Circuit 1 D3 2 VSS D2 14 D1 13 1 D3 2 VSS D2 14 D1 13 12V 100 0.1 NC 10 NC 9 NC 8 SC9314 Rosc=1.4M 4 OSC2 5 DOUT 6 NC 7 NC Rosc=1.4M VDD 11 NC 10 NC 9 NC 8 LED 4 OSC2 5 DOUT 6 NC 7 NC SC9314 3 OSC1 D0 12 12V 3 OSC1 D0 12 VDD 11 Note: In order to prevent the IC from being damaged owing to the latch up, the 100 resistor or the LED which also can be a transmission indicator is indispensable when VDD=9V~12V. PACKAGE OUTLINE DIP-14-300-2.54 2.54 UNIT: mm 6.40 1.50 19.4 7.62 15 degree 3.51 0.46 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2001.04.15 5 3.30 5.08 0.25 |
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