Silan Semiconductors SC6121 INFRARED REMOTE CONTROL TRANSMITTER DESCRIPTION The SC6121 is a remote control transmitter utilizing CMOS Technology specially designed for use on infrared remote control applications. It is capable of controlling 32 function keys and 3 double keys. SC6121 is housed in a 20-pins SO package. FEATURES * CMOS Technology * Low Operating Voltage (VDD=2.0~5.5V) SOP-20 * Using SEL pin, SC6121 can support 64+6 function codes * Customer Code can be selected APPLICATIONS * TV and VCR * Audio Equipment * Cable TV Tuner ORDERING INFORMATION * Cassette Deck * Air Conditioner SC6121-001 SC6121-002 * VCD and DVD ROM/Player ROM Content=0 Custom Version * Moniputer/Multi-Media Personal Computer System PIN CONFIGURATION KI0 1 20 CCS KI1 2 19 KI/O0 KI2 3 18 KI/O1 KI3 4 17 KI/O2 REM 5 16 KI/O3 SC6121 VDD 6 15 KI/O4 SEL 7 14 KI/O5 OSCO 8 13 KI/O6 OSCI 9 12 KI/O7 Vss 10 11 LMP HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 1 2002-02-28 Silan Semiconductors SC6121 BLOCK DIAGRAM KI0 1 KI1 2 KI2 3 KI3 4 OSCI OSCO VDD Vss 9 8 6 10 OSC Circuit Key Input Scan Circuit Timing Generation &Control Circuit Optput Control Circuit Code Generation Circuit 7 SEL 5 REM 11 LMP 20 CSS Key Input/Output Scan Circuit 19 18 17 16 15 14 13 12 KI/O0 KI/O1 KI/O2 KI/O3 KI/O4 KI/O5 KI/O6 KI/O7 ABSOLUTE MAXIMUM RATING (Tamb=25°C, unless otherwise specified) Symbol Value Supply Voltage Characteristic VDD 6.0 Unit V Input Voltage VIN -0.3~VDD V Power Dissipation Pd 250 mW Storage Temperature Tstg -40~+125 °C Operating Temperature Topr -20~+75 °C RECOMMENDED OPERATING CONDITIONS (Tamb=25°C, unless otherwise specified) Characteristic Symbol Min. Typ. Max. Unit Supply Voltage VDD 2.0 3.0 3.3 V Oscillation Frequency fosc 400 455 500 KHz Input Voltage VIN 0 -- VDD V Custom Code Select Pull-Up Rup -- 100 -- KΩ Resistance HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 2 2002-02-28 Silan Semiconductors SC6121 ELECTRICAL CHARACTERISTICS (Tamb=25°C,VDD=3.0V,unless otherwise specified) Parameter Symbol Test conditions Min 2.0 Typ Max Unit Supply Voltage VDD Current Consumption 1 IDD1 Fosc =455KHz 3.0 5.5 V 0.1 1.0 mA Current Consumption 2 IDD2 Fosc =STOP REM High Level Output Current IOH1 Vo=1.5V -5.0 -8.0 mA REM Low Level Output Current IOL1 Vo=0.3V 15 30 µA LMP High Level Output Current IOH2 Vo=2.7V -15 -30 µA LMP Low Level Output Current IOL2 Vo=0.3V 1 1.5 mA KI High Level Input Current IIH1 VIN =3.0V 5 KI Low Level Input Current IIL1 VIN =0V KI High Level Input Voltage VIH1 KI Low Level Input Voltage µA 1.0 30 µA -0.2 µA 0.7 VDD VDD V VIL1 0 0.3 VDD V KI/O High Level Input Voltage VIH2 0.7 VDD VDD V KI/O Low Level Input Voltage VIL2 0 0.4 V KI/O High Level Input Current IIH2 2 7 µA VIN =3.0V KI/O Low Level Input Current IIL2 VIN =0V KI/O High Level Output Current IOH3 Vo=2.5V KI/O Low Level Output Current IOL3 Vo=1.7V CCS Low Level Input Voltage VIH3 CCS High Level Input Current IIH3 -0.2 µA 0.5 1.5 mA 1.5 2.5 mA 0.2 µA 1.1 Pull Up VIN =3.0V V CCS Low Level Input Current IIL3 Pull Up VIN =0V -3 -15 µA CCS High Level Input Current IIH4 Pull Down VIN =3.0V 5 30 µA CCS Low Level Input Current IIL4 Pull Down VIN =0V -0.2 µA PIN DESCRIPTION Pin No. Symbol I/O 1~4 KI0~KI3 I Description 5 REM O Data Output Pin 6 VDD -- Power Supply 7 SEL I Select Pin 8 OSCO O Oscillator Pin 9 OSCI I Oscillator Pin 10 Vss -- Power Supply Key Input Pin Nos. 0~3 11 LMP -- 19~12 KI/O0~KI/O7 I/O Key Input/Output Pin Nos.0~7 Output LED Indicator 20 CCS I Custom Code Scan Input Pin HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 3 2002-02-28 Silan Semiconductors SC6121 FUNCTIONAL DESCRIPTION 1. TRANSMISSION CODE The transmission code consists of a leader code, 16-bits custom codes, and 8-bits data codes. The inverse code of the data code is also sent simultaneously. The following diagram shows this one frame construction. C0' C0' C0' C0' C0' C0' C0' C0' C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 C0 C1 C2 C3 C4 C5 C6 C7 Leader Code Custom Code 8 bits Custom Code' 8 bits Key Data 8 bits Key Data 8 bits The leader codes consist of a 9ms carrier waveform followed by a 4.5ms OFF waveform. It is used as the leader for the following code. Thus, when reception is configured by a microcomputer, the time relationship between the reception detection and other processes can be managed efficiently. The code uses the PPM (Pulse Position Modulation) Method, with "0" and "1" differentiated by the time between pulses. Each code consists of 8 bits, and simultaneous transmission of the inverse code allows configuration of a system with an extremely low error rate. 2. KEY INPUT MATRIX KI/O0 KI/O1 KI/O2 KI/O3 KI/O4 KI/O5 KI/O6 KI/O7 The Key Input Matrix of SC6121 if given below: 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 3. KEY INPUT A total of 32 keys can be connected by SC6121 Key Input Pins--KI0~KI3 and the Timing Signal Output Pins KI/O0~KI/O7. Double Key Operation is possible for only Key No.21 in combination with other keys connected to the KI/O5 line namely: Key No.22,23 or 24.thus, only the following key combinations may be used for the double key operation: 1. Key Nos.21 and 22 2. Key Nos.21 and 23 3. Key Nos.21 and 24 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 4 2002-02-28 Silan Semiconductors SC6121 Pull-down resistors are connected between the Key Input and Vss Pins. When more than one key (except the double key combinations: K21+22, K21+23, K21+24) are pressed simultaneously, the transmission output stops. Two key inputs are regarded as being pressed simultaneously when the time interval between these two key entries is less than 36ms. The order of priority given to two key inputs with a time interval of more than 36ms is on a First-Pressed-FirstServed or Longer-Pressed-First-Served Basis. When a key is pressed, the custom and data codes are read. 36ms later, the Remote (REM) Output is activated. When the key is kept depressed during this 36ms, one transmission is outputted. If the key is depressed for more than 108ms, then the only the leader code is transmitted continuously. 4. DOUBLE KEY OPERATION Double Key Operation is useful for operations such as tape deck recording. The following table shows the Key Data corresponding to the double keys pressed. Also refer to the Key Input Section. The Double Key operation forms are as follows: Key D0 D1 D2 D3 D4 D5 D6 D7 K21+K22 1 0 1 0 1 1 0 0/1 K21+K23 0 1 1 0 1 1 0 0/1 K21+K24 1 1 1 0 1 1 0 0/1 Note: D7=1 when SEL is connected to VSS, or D7=0 when SEL is connected to VDD. OPERATION K21 Transmission K21 push D5+K22 to 24 Transmission t >126ms K22 to 24 push NO OPERATION K21 Transmission K21 No Transmission 36ms< t <126ms K22 to 24 NO OPERATION No Transmission K21 -36ms< t < 36ms K22 to 24 NO OPERATION No Transmission K21 t >126ms K22 to 24 K22 to 24 Transmission HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 5 2002-02-28 Silan Semiconductors SC6121 5. REMOTE OUTPUT WAVEFORMS The Remote Output Waveforms are given in the diagram below: Ex. fosc=455KHz Key ON Min. 36ms 1 58.5 to 76.5ms 2 3 108ms 108ms 1 9ms Custom Code Custom Data Code 8bits 8bits Code 4.5ms 13.5ms Leader Code 18ms to 36ms Data Code 8bits 27ms 58.5ms to 76.5ms 2 9ms 0.56ms 4.5ms 13.5ms 0 1 1 0 0 1 2.25ms 1.125ms 3 9ms 2.25ms 0.56ms 11.25ms Carrier 8.77µs 26.3µs 9ms to 0.56ms Carrier Frequency---Fc=fosc/12=38KHz HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 6 2002-02-28 Silan Semiconductors SC6121 SC6121 KEYS DATA CODE The Keys Data Code is given in the table below. Key No. KI0 Connection K1 • KI1 KI2 • K2 • K4 • • K6 • K8 • • K10 • K12 • • K14 • K16 • • K18 • K20 • • K22 • K24 • • K26 • K28 K30 K31 K32 KI/O6 • K27 K29 KI/O5 • K23 K25 KI/O4 • K19 K21 KI/O3 • K15 K17 KI/O2 • K11 K13 KI/O1 • K7 K9 Data Code KI/O KI/O0 • K3 K5 KI3 • • KI/O7 • • D0 D1 D2 D3 D4 D5 D6 D7 0 0 0 0 0 0 0 0/1 1 0 0 0 0 0 0 0/1 0 1 0 0 0 0 0 0/1 1 1 0 0 0 0 0 0/1 0 0 1 0 0 0 0 0/1 1 0 1 0 0 0 0 0/1 0 1 1 0 0 0 0 0/1 1 1 1 0 0 0 0 0/1 0 0 0 1 0 0 0 0/1 1 0 0 1 0 0 0 0/1 0 1 0 1 0 0 0 0/1 1 1 0 1 0 0 0 0/1 0 0 1 1 0 0 0 0/1 1 0 1 1 0 0 0 0/1 0 1 1 1 0 0 0 0/1 1 1 1 1 0 0 0 0/1 0 0 0 0 1 0 0 0/1 1 0 0 0 1 0 0 0/1 0 1 0 0 1 0 0 0/1 1 1 0 0 1 0 0 0/1 0 0 1 0 1 0 0 0/1 1 0 1 0 1 0 0 0/1 0 1 1 0 1 0 0 0/1 1 1 1 0 1 0 0 0/1 0 0 0 1 1 0 0 0/1 1 0 0 1 1 0 0 0/1 0 1 0 1 1 0 0 0/1 1 1 0 1 1 0 0 0/1 0 0 1 1 1 0 0 0/1 1 0 1 1 1 0 0 0/1 0 1 1 1 1 0 0 0/1 1 1 1 1 1 0 0 0/1 Note: D7=1 when SEL is connected to VSS, or D7=0 when SEL is connected to VDD. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 7 2002-02-28 Silan Semiconductors SC6121 TYPICAL APPLICATION CIRCUIT VDD 200pF 200pF 455KHz KI/O3 KI/O4 KI/O5 KI/O6 KI/O7 19 18 17 16 15 14 13 12 ¡ ¡ ¡ ¡ ¡ F SEL 7 VSS 10 CCS 20 ¡ 100K ¡ IN4148 KI/O2 IN4148 KI/O1 ¡ 47 VDD KI/O0 100K For Custom Code Selection ¡ SC6121 IN4148 KI3 5 REM 100K 4 11 LMP IN4148 KI2 6 VDD 100K 3 8 OSCO IN4148 KI1 1 9 100K 2 ¡ OSCI IN4148 KI0 100K 1 270 LED 100K F IN4148 0.1 IR LED ¡ 100K F 47 470 IN4148 VCC VDD Note:1. Two capacitance connect with Vcc should as near as possible. 2. The line between two capacitance and Vcc and ground should as short as possible. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 8 2002-02-28 Silan Semiconductors SC6121 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: 1.2 9 2002-02-28 Silan Semiconductors SC6121 PACKAGE OUTLINE 9.525(375) 0.4 0.3 7.6 UNIT: mm 10.2 SOP-20-375-1.27 0.25 0.05 B B B 1.27 12.7 B0.1 B0.25 0.4 3.1MAX 11.43 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 10 2002-02-28 Silan Semiconductors SC6121 Attach Revision History Data REV 2001.12.12 1.1 2002.02.28 1.2 Description Page Modify the “Typical application circuit” 8 Add the “PCB wire layout schematic” 9 Modify the “Package outline” 10 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.2 11 2002-02-28