SC50462

SC50462 INFRARED REMOTE CONTROL TRANSMITTER OF 50462 CODE FORMAT DESCRIPTION The SC50462 is a remote control transmitter utilizing CMOS technology specially designed for use on infrared applications. It 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 * Least external components. * Up to 76 instructions * Double key operation is possible. APPLICATIONS * Television remote control transmitter * Video cassette recorder(VCR) remote control transmitter ORDERING INFORMATION Device SC50462 SC50462S Package SDIP-24-300-2.54 SOP-24-375-1.27 BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Key encoder REV:2.2 2005.12.15 Page 1 of 12 SC50462 ABSOLUTE MAXIMUM RATINGS(Tamb=25°C) Characteristic Supply Voltage Input Voltage Output Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VCC VIN VOUT PD Topr Tstg -0.3 ~ 5.5 Vss-0.3V ~ VCC+0.3V Vss ~ VCC 300 -10 ~ +70 -40 ~ +125 Ratings Unit V V V mW °C °C ELECTRICAL CHARACTERISTICS(Tamb=25°C,VCC=3.0V,Vss=0,Unless otherwise specified) Parameter Operating Supply Voltage Operating Supply Current Stand-by Current High level Output Current( OUT ) Low level Output Current( OUT ) High level Output Current( CNTR ) Low level Output Current( CNTR ) Symbol VCC ICC1 ICC2 IOH IOL IOH IOL VOH=2V VOL=1V VOH=2V VOL=1V 5 -3 1 -3 Test Conditions Tamb=20 ~ 70°C fosc=455kHz Min 1.8 Typ 3 Max 5 0.3 1 Unit V mA µA mA mA mA mA PIN CONFIGURATION Vss OSCI OSCO CNTR I1 I2 I3 I4 I5 1 2 3 4 5 24 Vcc 23 OUT 22 C5 21 C4 20 S8 SC50462 6 7 8 9 19 S7 18 S6 17 S5 16 S4 15 S3 14 S2 13 S1 I6 10 I7 11 I8 12 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 2 of 12 SC50462 PIN DESCRIPTION Pin No. 1,24 2,3 4 5~12 13~20 21,22 23 Pin Name VSS, VCC OSCI,OSCO CNTR Description 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. Key Scan Signal Input pins. Key Scan Signal Output pins. Custom Code Modulation Pin I1~I8 S1~S8 C4 , C5 OUT 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-- C4 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 “ in the 7th pulse-rising and “ in the 17th pulse-rising. L” H” Note: Oscillator Frequency=480 or 455kHz 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. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 3 of 12 SC50462 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 S1 S2 S3 S4 SW25 I7 I6 I5 I4 I3 I2 I1 SW11 SW12 SW13 Note: SC50462 permits two keys function but only “ ”key are allowed. When you push one key of SW11/12/13, you can push with another key of SW25/26/27/28. Otherwise, other conditions are illegal. S5 SW26 S6 SW27 S7 SW28 S8 SW25 and SW11 SW25 and SW12 SW25 and SW13 SW27 and SW11 SW27 and SW12 SW27 and SW13 SW26 and SW11 SW26 and SW12 SW26 and SW13 SW28 and SW11 SW28 and SW12 SW28 and SW13 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. Table 1: Key Matrix/Code Scan Output S1 S2 S3 S4 S5 S6 S7 S8 Data D0 0 1 0 1 0 1 0 1 D1 0 0 1 1 0 0 1 1 D2 0 0 0 0 1 1 1 1 REV:2.2 Octal display 0 1 2 3 4 5 6 7 2005.12.15 Page 4 of 12 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn SC50462 Data D3 0 1 0 1 0 1 0 1 D4 0 0 1 1 0 0 1 1 D5 0 0 0 0 1 1 1 1 Key Input I1 I2 I3 I4 I5 I6 I7 I8 Octal display 0 1 2 3 4 5 6 7 Table 2: Double Key Signal/Code Scan Output S1/I1 (SW1 1) S5/I2 (SW25) S6/I2 (SW26) S7/I2 (SW27) S8/I2 (SW28) S2/I1 (SW1 2) S5/I2 (SW25) S6/I2 (SW26) S7/I2 (SW27) S8/I2 (SW28) S5/I2 (SW25) S6/I2 (SW26) S7/I2 (SW27) S8/I2 (SW28) 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 C4 and C5 Terminals. The C4 and C5 pins are inversed; therefore, if the C4 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 Data Code D0 0 1 0 1 0 1 0 1 0 1 0 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 D2 1 1 1 1 1 1 1 1 1 1 1 1 D3 1 1 1 1 1 1 1 1 1 1 1 1 D4 0 0 0 0 0 0 0 0 0 0 0 0 D5 0 0 0 0 0 0 0 0 0 0 0 0 D6 1 1 1 1 0 0 0 0 1 1 1 1 D7 0 0 0 0 1 1 1 1 1 1 1 1 D0~D2 4 5 6 7 4 5 6 7 4 5 6 7 Octal Display D3~D5 1 1 1 1 1 1 1 1 1 1 1 1 D6~D7 1 1 1 1 2 2 2 2 3 3 3 3 S3/I1 (SW1 3) Bit "0" 1.00/1.05ms Bit "1" 2.00/2.10ms Note: Oscillator Frequency=480 or 455kHz HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 5 of 12 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. 10 pulses 1 Bit Carrier Wave 1/3 Duty Cycle a 2a a= 8.3µ s/8.76µ s Note: Oscillator Frequency=480 or 455kHz HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 6 of 12 SC50462 TYPICAL APPLICATION CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 7 of 12 SC50462 CHIP TOPOGRAPHY 22 21 20 19 18 17 16 15 23 14 24 13 1 12 2 11 10 3 4 5 6 7 8 9 size: 1.96 x 2.07mm2 PAD COORDINATES (Unit: µm) No. 1 2 3 4 5 6 7 8 9 10 11 12 Symbol P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 X -904.75 -904.75 -904.75 -450.25 -200.25 80.75 220.75 501.75 641.75 906.00 906.00 906.00 Y -122.00 -258.25 -709.00 -851.25 -851.25 -851.25 -851.25 -851.25 -851.25 -615.50 -475.50 -194.50 No. 13 14 15 16 17 18 19 20 21 22 23 24 Symbol P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 X 906.00 906.00 906.00 906.00 739.00 530.50 322.00 113.50 -564.75 -773.25 -904.75 -857.00 Y 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 CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 8 of 12 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. * The emitter of triode connect 1 resistor at least. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 9 of 12 SC50462 PACKAGE OUTLINE SDIP-24-300-2.54 UNIT: mm 6.40±0.25 SOP-24-375-1.27 3 .0 0 M IN 4.36MAX 7 .6 2 UNIT: mm 0.25±0.05 1.27 15.34±0.25 0.40 3.10MAX 13.97 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 10 of 12 0.25±0.05 SC50462 HANDLING MOS DEVICES: Electrostatic charges can exist in many things. All of our MOS devices are internally protected against electrostatic discharge but they can be damaged if the following precautions are not taken: • Persons at a work bench should be earthed via a wrist strap. • Equipment cases should be earthed. • All tools used during assembly, including soldering tools and solder baths, must be earthed. • MOS devices should be packed for dispatch in antistatic/conductive containers. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2005.12.15 Page 11 of 12