Silan Semiconductors SC9012 INFRARED REMOTE CONTROL TRANSMITTER DESCRIPTION SC9012 is an infrared remote control transmitter utilizing CMOS Technology specially designed for use on infrared remote control applications. It is capable of controlling 32 function keys and 6 double keys. Each system has a maximum of 8 commands; thus, SC9012 can provide up to a total of 256 commands. The pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantage. SC9012 is housed in a 20- SOP-20 pins SO package. FEATURES ORDERING INFORMATION * CMOS Technology SC9012 SOP-20 Package * Low Power Consumption APPLICATIONS * Built-in Oscillation Circuit * Least External Components * 32 Function Keys * Infrared Remote Control Transmitter 8 Customer CodesUp to 256 Commands Equipment * 6 Double Function Keys * Television Remote control Equipment * LED Indication of Transmission * VCR Remote control Equipment * VCD, Audio Equipment PIN CONFIGURATION BLOCK DIAGRAM OSCO OSCI DOUT LMP 9 5 11 8 KI0 1 20 SEL KI1 2 19 KO0 KI2 3 18 KO1 KI3 4 17 KO2 DOUT 5 16 KO3 OSC Circuit 10 VSS Output Circuit 6 VDD SC9012 VDD 6 NC 7 14 KO5 OSCO 8 13 KO6 OSCI 9 12 KO7 Vss 10 15 KO4 Frequency Division Circuit Carrier Generation Circuit NC 7 SEL 20 Timing Generation Control Circuit Customer Code Latch Circuit Digital Circuit Key Input Scan Circuit Key Output Scan Circuit 11 LMP 1 2 3 4 KI0 KI1 KI2 KI3 19 18 17 16 15 14 13 12 KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 1 2002-02-28 Silan Semiconductors SC9012 ABSOLUTE MAXIMUM RATING (Tamb=>25°C Symbol Value Unit Supply Voltage Characteristic VDD -0.3 ~ 5.0 V Input Voltage With Respect To Vss VIN Vss-0.3 ~ VDD+0.3 V Output Current IOUT(REO) -20 mA Pd 300 mW Storage Temperature Tstg -40 ~ +125 °C Operating Temperature TOPR -20 ~ +75 °C Power Dissipation ELECTRICAL CHARACTERISTICS (Tamb=25°C,VDD=3V) Parameter Symbol Test conditions Operating supply Voltage VDD All Function Operating Operating Supply Current IDD fOSC=455 kHz ISB All Keys Off Stops. Oscillation Stand-By Current Min Typ Max Unit 2.0 -- 4.0 V -- -- 1 mA 1 µA Output Floating. Output High Level Current (Dout) IOH VOH=1.5V, VDD =3V -10 -- -- mA Output Low Level Current (LMP) IOL VOL=1.5V, VDD =3V 5 -- -- mA Input High Level Voltage (KI) VIH VDD =3V 0.7 VDD VDD V Input Low Level Voltage (KI) VIL VDD =3V 0 0.3 VDD V Oscillation Frequency fosc Input Pull-down Resistor (KI) RON -VDD =3V 400 455 600 kHz 100 300 500 kΩ PIN DESCRIPTION Pin No. Symbol I/O 1~4 KI0~KI3 I Key Scan Input Pins. Each pin has a built-in pull-down resistor Description 5 DOUT O Infrared LED Driving Output Pin 6 VDD -- Positive Power Supply 7 NC -- No Connection. (When used, Suggest to connected with VDD) 8 OSCO O Oscillator Output Pin 9 OSCI I Oscillator Input Pin 10 VSS -- Negative Power Supply 11 LMP O LED Display Output Pin 12~19 KO0~KO8 O Key Scan Output Pins 20 SEL I Custom Code Selection Pin HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 2 2002-02-28 Silan Semiconductors SC9012 FUNCTIONAL DESCRIPTION 1. OSCILLATION CIRCUIT An oscillator circuit may be constructed by connecting a 480kHz or 455kHz Crystal Resonator and two capacitors between OSCO and OSCI. Please refer to the follow diagram. Unless the keys are being operated, the oscillation is normally stopped. Thus, power consumption is considerably reduced. SC9012 OSCI OSCO 9 8 455kHz 100pf 100pf 2. OSCILLATION FREQUENCY The oscillator frequency is 455kHz, passed by a 12 division frequency circuit, can get a 37.9 ~ 39.2 frequency; 1/3 duty carrier. In addition, The oscillator frequency divided by 256, can get the basic system work time (1.78kHz). The relation of carrier frequency (fc), internal work time period (Tm) and oscillator frequency (fosc) is given below: fc = 1/12× fosc duty1/3 Tmthe width of a high level pulse. Tm = 256 / fosc 3. KEY MATRIX Key Inputs -- KI0~KI3 of SC9012 have built-in pull-down resistors, which combined 32 keys matrix with Key Outputs --KO0~KO7. Except the stated 6 double keys, Pressing other keys that are NOT intended for the double key KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 operation do NOT generate any output. Please refer to the follow diagram for the keys input matrix of SC9012. KI0 1 5 9 13 17 21 25 29 KI1 2 6 10 14 18 22 26 30 KI2 3 7 11 15 19 23 27 31 KI3 4 8 12 16 20 24 28 32 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 3 2002-02-28 Silan Semiconductors SC9012 4. CUSTOMER CODE There are 8 customer codes, can be selected by using the SEL pin connected with any pin of “KO0 ~ KO7”. Please refer to follow diagram: Connected with System Code SEL (S2 S1 S0 SEL KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 KO0 0 0 0 20 19 18 17 16 15 14 13 12 KO1 0 0 1 KO2 0 1 0 KO3 0 1 1 KO4 1 0 0 KO5 1 0 1 KO6 1 1 0 KO7 1 1 1 KO2 connected with SEL, the value of S2, S1, S0 is 0,1,0 The Custom Codeconsists of 8 bits S0 S1 S2 S3 S4 S5 S6 S7 Among these, S0, S1, S2 can be selected with SEL Pin and any pin of “KO0 ~ KO7”; Bit S3 has a fixed value of “1”; Bits S4 ~ S7 have a fixed value of “0”. 5. TRANSMISSION CODE S0 S1 S2 S3 S4 S5 S6 S7 S0 S1 S2 S3 S4 S5 S6 Leader Code Custumer Code Customer Code S7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 Key Data Code Key Data Code Refer to the above diagram, the transmission code consists of leader code, customer code, and key data code.; The leader code consists of a 4.5 ms carrier waveform followed by a 4.5 ms OFF waveform. The 8-bits customer code transmitted two times; The 8-bits key data code transmitted two times also, first is the origin code; second is the inverse code. The code uses the PPM (Pulse Position Modulation ) Method, with “0”and “1” differentiated by the time between pulses. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 4 2002-02-28 Silan Semiconductors SC9012 The waveforms of leader code, bit “0” and bit “1” refer to follow diagram: Leader Code 4.5ms 4.5ms Bit“0” Tm Tm Tm=0.56ms Bit“1” 3Tm Tm 6. DOUBLE KEY OPERATION There are 6 double keys operation, such as K21 connected with K22 ~ K24; K25 connected with K26 ~ K28, refer to the follow table: The Primary Key The Secondary Key D0 D1 D2 D3 D4 D5 D6 D7 K22 1 0 1 0 1 1 0 0 K23 0 1 1 0 1 1 0 0 K24 1 1 1 0 1 1 0 0 K26 1 0 0 1 1 1 0 0 K27 0 1 0 1 1 1 0 0 K28 1 1 0 1 1 1 0 0 K21 K25 When any of the double or multiple key combinations are pressed, except the 6 keys mentioned above, there is no output. In addition, Double Key Operation is useful for tape deck recording operation. Press the K21 or K23 key at the first then followed by the secondary key such as K22~K24; K26~K28. Please refer to the follow diagram: 1. Double Key Operation available K21(K25) Key Code Transmission K21 (K25) K22~K24+D5(1) Key Code Transmission (K26~K28+D5(1)) T>126ms K22~K24 K26~K28 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 5 2002-02-28 Silan Semiconductors SC9012 2. Double Key Operation disable K21(K25) Key Code Transmission K21(K25) 36ms<t<126ms Case One No transmission K22~K24 K26~K28 Transmission Disable K21(K25) -36ms<t<36ms Case Two K21(K25) K22~K24 K26~K28 K21(K25) No transmission T>126ms Case Three K22~K24 K26~K28 7. REMOTE OUTPUT WAVEFORMS Key Pressed A word Transmission 64Tm Another word Transmission when pressed continuos 192Tm 192Tm Data Transmission Wavefroms Leader Code 8Tm Customer Code 8Tm 16Tm 8Tm 8Tm 4Tm 2Tm Tm Customer Code Tm=256/fosc =0.56ms(fosc=455kHz) Tm 16Tm 4Tm Key Data Code Key Data Code 8Tm 8Tm Tm 16Tm S0=1 4Tm 2Tm S0=0 2Tm HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 6 2002-02-28 Silan Semiconductors SC9012 8. SC9012 DATA CODE The Keys Data Code is given in the table below. Connection Key No. K0 K1 • K1 K2 • K4 • • K6 • K8 • • K10 • K12 • • K14 • K16 • • K18 • K20 • • K22 • K24 • • K26 • K28 K31 K32 KO6 • K27 K30 KO5 • K23 K29 KO4 • K19 K25 KO3 • K15 K21 KO2 • K11 K17 KO1 • K7 K13 KI/O KO0 • K3 K9 K3 • K2 K5 Data Code • • KO7 • • D0 D1 D2 D3 D4 D5 D6 D7 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 1 0 0 0 0 1 0 1 1 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 0 0 0 1 0 1 0 0 0 1 0 1 0 1 0 0 0 0 1 1 0 1 0 0 0 1 1 1 0 1 0 0 0 0 0 0 1 1 0 0 0 1 0 0 1 1 0 0 0 0 1 0 1 1 0 0 0 1 1 0 1 1 0 0 0 0 0 1 1 1 0 0 0 1 0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 1 1 1 1 0 0 0 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 7 2002-02-28 Silan Semiconductors SC9012 TYPICAL APPLICATION CIRCUIT Key Matrix Select Customer Code 20 19 18 17 16 15 14 13 12 SEL KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 LMP 11 SC9012 KI2 2 3 KI3 DOUT VDD 4 5 6 ¡ NC OSCO OSCI Vss 7 8 9 1K 10 100pf KI1 1 100pf KI0 Indication LED VDD=3V 455kHz 270 ¡ radiation diode 47 F ¡ 2 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 8 2002-02-28 Silan Semiconductors SC9012 CHIP TOPOGRAPHY 4 3 2 1 20 19 18 17 16 15 14 5 13 6 12 7 8 9 10 11 Size: 1.25 x 1.47 mm 2 PAD COORDINATES (Unit: µm) No. Symbol X Y No. Symbol X Y 1 P1 -2.5 550.2 11 P11 438.6 -674.0 2 P2 -142.3 550.2 12 P12 432.7 -455.3 3 P3 -282.1 550.2 13 P13 432.7 -315.2 4 P4 -422.4 550.2 14 P14 432.7 -175.6 5 P5 -564.0 -208.0 15 P15 432.7 -35.7 6 P6 -564.0 -348.0 16 P16 432.7 107.7 7 P7 -564.0 -488.3 17 P17 432.7 243.8 8 P8 -554.7 -671.2 18 P18 438.9 550.2 9 P9 -178.8 -671.2 19 P19 278.7 550.2 10 P10 -39.9 -671.2 20 P20 137.4 550.2 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 SC9012 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 * Recommended triode use 9014. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 10 2002-02-28 Silan Semiconductors SC9012 PACKAGE OUTLINE 7.62(300) UNIT: mm 0.4 SOP-20-300-1.27 0.3 5.3 7.8 B B B 0.15 0.05 1.27 B0.10 B0.25 0.45 12.70 2.25MAX 11.43 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 11 2002-02-28 Silan Semiconductors SC9012 Attach Revision History Data 2001.11.12 REV Description Page 2.0 Add the “Ordering information” 2002.02.28 2.1 1 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