Silan Semiconductors SC50462 INFRARED REMOTE CONTROL TRANSMITTER DESCRIPTION The SC50462 is a remote control transmitter utilizing CMOS technology specially designed for use on infrared applications. It SDIP-24 has 64 functions and a total of 76 commands can be transmitted. Housed in 24 pins DIP package, SC50462 has 2 address bits. FEATURES * High performance CMOS technology * Low power consumption SOP-24 * Least external components. * Up to 76 instructions * Double key operation is possible. ORDERING INFORMATION APPLICATIONS SC50462 SC50462S * Television remote control transmitter SDIP-24 Package SOP-24 Package * Video cassette recorder(VCR) remote control transmitter BLOCK DIAGRAM Vss Vcc 1 24 C5 22 C4 21 I1 13 Instruction Decoder I2 14 I3 15 I4 16 I5 17 Key Encoder Timing Generator Code Modulator 4 CNTR I6 18 I7 19 Output Buffer I7 20 23 OUT Oscillation Circuit Scan Signal Generating Circuit 5 6 7 8 9 10 11 12 2 3 S1 S2 S3 S4 S5 S6 S7 S8 OSCI OSCO HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 1 2002-02-28 Silan Semiconductors SC50462 PIN CONFIGURATION Vss 1 24 Vcc OSCI 2 23 OUT OSCO 3 22 C5 CNTR 4 21 C4 S1 5 20 I8 S2 6 S3 7 18 I6 S4 8 17 I5 S5 9 16 I4 S6 10 15 I3 S7 11 14 I2 S8 12 13 I1 19 I7 SC50462 ABSOLUTE MAXIMUM RATINGS(Ta=25°C) Characteristic Supply Voltage Input Voltage Output Voltage Power Dissipation Symbol Value Unit VCC -0.3 ~ 5.5 V VIN Vss-0.3V ~ VCC+0.3V V VOUT Vss ~ VCC V PD 300 mW Operating Temperature Topr -10 ~ +70 °C Storage Temperature Tstg -40 ~ +125 °C ELECTRICAL CHARACTERISTICS(Tamb=25°CVCC=3.0V,Vss=0,Unless otherwise specified) Symbol Test Conditions Min Typ Max Operating Supply Voltage Parameter VCC Ta=20 ~ 70°C 1.5 3 5 Unit V Operating Supply Current ICC1 Fosc=455kHz 0.3 mA 1 µA 100 250 400 kΩ 200 350 500 Stand-by Current ICC2 Pull-Up Resistor(I1~I8) Rup Pull-Up Resistor( C 4 , C5 ) Rup Output Current(S1~S8) IOL VOL=1.2V High level Output Current( OUT ) IOH VOH=2V 5 mA Low level Output Current( OUT ) IOL VOL=1V -3 mA High level Output Current( CNTR ) IOH VOH=2V 1 mA Low level Output Current( CNTR ) IOL VOL=1V -3 mA kΩ -0.2 mA HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 2 2002-02-28 Silan Semiconductors SC50462 PIN DESCRIPTION Pin No. Pin Name Input/output Description 1,24 Vss,Vcc Power 2,3 OSCI,OSCO I/O 4 CNTR O 5~12 S1~S8 O Key Scan Signal Output pins. 13~20 I1~I8 I Key Scan Signal Input pins. 21,22 C4 , C5 I Custom Code 23 OUT O Modulation Pin Power Supply: Vcc=3.0V,Vss=0V Oscillator Input/Output Pin, 455 or 480kHz Crystal is connected between these pins. Transmitting Indicator. An LED and resistor are connected from this pin to Vcc. FUNCTIONAL DESCRIPTION SC50462 is a sending signal IC on infrared remote control. Consisting of timing generating circuit, scan signal generating circuit, key input encoder, instruction decoder, custom code circuit, code encoder, and output buffer. It has 8*8 key matrix input and custom code with 16 bit PCM which shows 76 instructions.76Instruction are devided in 64 one shot signal and 12 2-shot signal. When Input Signal(I1~I8) and/or in combination with the Scan Signals(S1~S8) are activated, SC50462 checks the ID and the Custom Code Bits-- C 4 and C5 --setting before finally sending out the remote control signal. 1. CNTR OUTPUT The CNTR Pin is the LED transmission Indicator. This means that Whenever a valid transmission is sent, the LED lights up. The CNTR output becomes “L” in the 7th pulse-rising and “H” in the 17th pulse-rising. 7th C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 17th D7 Next Frame OUT CNTR One Word 44ms or 46.4ms Note: Oscillator Frequency=480 or 455kHz HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 3 2002-02-28 Silan Semiconductors SC50462 2. OSCILLATING CIRCUIT An oscillator circuit may be constructed by using a 480kHz or 455kHz Crystal Resonator and two capacitors. Please refer to the following diagram. The carrier frequency transmitted is 40kHz or 37.9kHz.Unless any legal key input is activated, the oscillation is automatically stopped. Thus ,power consumption is considerably reduced. SC50462 OSCI 2 OSCO 3 480kHz/ 455kHz 200pF 200pF 3. KEY INPUT A total of 64 keys may be connected by Input Pins(I1~I8) and Output Pins(S1~S8) to form an 8x8 Key Matrix. Double key operation is possible for only one of the keys—SW25~SW28 in combination with any one of the keys – SW11~SW13. Any other key combination are regards as illegal and will not generate any activity. Thus, only the following key combinations may be used for the doubled key operation: I8 I7 I6 I5 I4 I3 I2 I1 Note: SW11 S1 SW12 S2 SW13 S3 SC50462 permits two keys function but only “ ” key are allowed. S4 SW25 When you push one key of SW26 SW11/12/13, you can push with SW27 another key of SW25/26/27/28. S5 S6 S7 Otherwise, other conditions are SW28 illegal. S8 SW25 and SW11 SW25 and SW12 SW25 and SW13 SW26 and SW11 SW26 and SW12 SW26 and SW13 SW27 and SW11 SW27 and SW12 SW27 and SW13 SW28 and SW11 SW28 and SW12 SW28 and SW13 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 4 2002-02-28 Silan Semiconductors SC50462 4. TRANSMISSION CODE The transmission Code consists of 16 bits, namely: 8 bits custom code(C0~C7 ) and 8 bits data code (D0~D7). Please refer to the table below: C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 Custom Code Data Code One frame of the Transmission Code If a Single Shot Key is depressed, data Codes—D6 and d7 will be given the value of (0,0).Please refer to the table1.If a valid double key operation is performed, the data codes will receive the values described in Table 2. Scan Output Data Octal display D0 D1 D2 S1 0 0 0 0 S2 1 0 0 1 S3 0 1 0 2 S4 1 1 0 3 S5 0 0 1 4 S6 1 0 1 5 S7 0 1 1 6 S8 1 1 1 7 Key Input Data Octal display D3 D4 D5 I1 0 0 0 0 I2 1 0 0 1 I3 0 1 0 2 I4 1 1 0 3 I5 0 0 1 4 I6 1 0 1 5 I7 0 1 1 6 I8 1 1 1 7 Table 1: Key Matrix/Code HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 5 2002-02-28 Silan Semiconductors Scan Output SC50462 Data Code Octal Display D0 D1 D2 D3 D4 D5 D6 D7 D0~D2 D3~D5 D6~D7 S5/I2 (SW25) 0 0 1 1 0 0 1 0 4 1 1 S1/I1 S6/I2 (SW26) 1 0 1 1 0 0 1 0 5 1 1 (SW11) S7/I2 (SW27) 0 1 1 1 0 0 1 0 6 1 1 S8/I2 (SW28) 1 1 1 1 0 0 1 0 7 1 1 S5/I2 (SW25) 0 0 1 1 0 0 0 1 4 1 2 S2/I1 S6/I2 (SW26) 1 0 1 1 0 0 0 1 5 1 2 (SW12) S7/I2 (SW27) 0 1 1 1 0 0 0 1 6 1 2 S8/I2 (SW28) 1 1 1 1 0 0 0 1 7 1 2 S5/I2 (SW25) 0 0 1 1 0 0 1 1 4 1 3 S3/I1 S6/I2 (SW26) 1 0 1 1 0 0 1 1 5 1 3 (SW13) S7/I2 (SW27) 0 1 1 1 0 0 1 1 6 1 3 S8/I2 (SW28) 1 1 1 1 0 0 1 1 7 1 3 Table 2: Double Key Signal/Code 5. CUSTOM CODE SC50462 has a total of 8 bits custom code (C0~C7). Custom Code Bits –C4 and C5 can be externally selected using the C 4 and C5 Terminals. The C 4 and C5 pins are inversed; therefore, if the C 4 and C5 terminals are pulled HIGH, then the Custom Code Bits—C4 and C5 would have the Value(0,0). Likewise, when pulled LOW, then C4 and C5 bits will be (1,1),The other Customs Code Bits,namely:C0~C3 and C6,C7 are fixed at (1,1,1,0) and (1,0 ): The waveform of bits are given below: 0.25/0.26ms Bit "0" 1.00/1.05ms Bit "1" 2.00/2.10ms Note: Oscillator Frequency=480 or 455kHz HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 6 2002-02-28 Silan Semiconductors SC50462 6. KEY ON TIMING When any key is pressed, the output pin-- OUT continuously generates the waveform described below until the key is released. KEY ON 44ms/46.4ms OUT 1st Frame 2nd Frame n-th Frame Note: Oscillator Frequency=480 or 455kHz 7. CARRIER WAVEFORM The following is the carrier waveform diagram. A bit modulates 10 carrier waveforms. 1 Bit 10 pulses Carrier Wave 1/3 Duty Cycle a 3a a= 8.3µs/8.76µs Note: Oscillator Frequency=480 or 455kHz HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 7 2002-02-28 Silan Semiconductors SC50462 TYPICAL APPLICATION CIRCUIT +3V Vcc LED ¡ 150 ¡ S8550 1 F 47 1 Vss Vcc 24 2 OSCI 3 OSCO C5 22 4 CNTR C4 21 5 S1 I8 20 6 S2 I7 19 7 S3 I6 18 8 S4 I5 17 9 S5 I4 16 10 S6 I3 15 11 S7 I2 14 12 S8 I1 13 200pF OUT 23 IR LED ¡ 150 200pF 480kHz/ 455kHz SC50462 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 8 2002-02-28 Silan Semiconductors SC50462 CHIP TOPOGRAPHY 22 21 20 19 17 18 16 15 23 14 24 13 1 12 2 11 10 3 4 5 6 7 8 9 2 size: 1.96 x 2.07mm PAD COORDINATES (Unit: µm) No. Symbol X Y No. Symbol X Y 1 2 3 4 5 6 7 8 9 10 11 12 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 -904.75 -904.75 -904.75 -450.25 -200.25 80.75 220.75 501.75 641.75 906.00 906.00 906.00 -122.00 -258.25 -709.00 -851.25 -851.25 -851.25 -851.25 -851.25 -851.25 -615.50 -475.50 -194.50 13 14 15 16 17 18 19 20 21 22 23 24 P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 906.00 906.00 906.00 906.00 739.00 530.50 322.00 113.50 -564.75 -773.25 -904.75 -857.00 54.50 154.00 362.50 571.00 854.75 854.75 854.75 854.75 854.75 854.75 248.00 12.00 Note: The original point of the coordinate is the die center. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 9 2002-02-28 Silan Semiconductors SC50462 PCB WIRE LAYOUT SCHEMATIC: Transmitting tube output ground line The transmitting tube ground line and IC ground line should layout separated or overstriking ground line. The above IC only use to hint, not to specified. Note: * In wire layout, the power filter capacitor should near to IC. * In wire layout, should avoid power line and ground line too long. * Recommended infrared transmit unit and IC ground line should layout separated, or overstriking lines. resistor at least. * The emitter of triode connect 1 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 10 2002-02-28 Silan Semiconductors SC50462 PACKAGE OUTLINE SDIP-24-300-2.54 UNIT: mm 6.4 B B0.3 1.27 15 degree 0.46 3.00MIN 0.5 MIN 4.36MAX 29.72 B 0.25 0.25 7.62(300) 0.05 2.54 B0.08 0.89MAX 0.05 BB 9.525(375) UNIT: mm 10.2 0.4 7.6 0.3 SOP-24-375-1.27 0.25 B 1.27 15.34 B0.25 0.40 B0.1 3.10MAX 13.97 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 11 2002-02-28 Silan Semiconductors SC50462 Attach Revision History Data 2001.11.08 REV Description Page 2.0 Modify the “Absolute maximum rating “ 2002.02.28 2.1 2 Modify the “Typical application circuit “ 8 Add the “PCB wire layout schematic” 10 Modify the “Package outline” 11 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 12 2002-02-28