SC9243 INFRARED REMOTE CONTROL TRANSMITTER OF 9012 CODE FORMAT DESCRIPTION SC9243 is an infrared remote control transmitter utilizing CMOS Technology specially designed for electrical appliances such as Audio System, Television, Video Cassette Recorder, CD Player and others. SC9243 is capable of multiple keying; thus, a maximum of 144 instructions is possible. The pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantage. FEATURES * CMOS Technology, Low Power Consumption * Least External Components * Up To 144 Instructions (32 Basic + 112 Multiple Keys) * Multiple Keying Is Possible * Wide Range Of Operating Supply Voltage: 2~4 Volts * 7 Out Of 8 System Code Bits Are Pre-Settable * Interference From Other Equipment Or Apparatus Is Prevented. ORDERING INFORMATION Part No. Package SC9243 DIP-20-300-2.54 SC9243S SOP-20-375-1.27 APPLICATIONS * Mini COMPO * Video Cassette Recorder(VCR) * CD-Player * Audio Equipment BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 1 of 15 SC9243 ABSOLUTE MAXIMUM RATING (Tamb=>25°C) Characteristics Symbol Ratings Unit -0.3 ~ 5.0 V VSS-0.3 ~ VDD+0.3 V Pd 300 mW Storage Temperature Tstg -40~125 °C Operating Temperature Topr -20~70 °C Supply Voltage VDD Input Voltage With Respect To Vss VIN Power Dissipation Test conditions VDD=3 V All outputs floating VDD=3 V ELECTRICAL CHARACTERISTICS (Tamb=25°C, VDD=3V) Characteristics Operating supply Voltage Operating Supply Current Stand-By Current Symbol Test conditions VDD All Function Operating IDD Key On Without Load fOSC=455 Min. Typ. Max. Unit 2.0 3.0 4.0 V 1000 μA 1 μA 1.0 μA kHz ISB All Keys Off Stops Oscillation Output Floating. Input Leakage Current(KI0~KI7) IIL VIN=GND Dout Driving Current IOH VDD =3V VO =1.5V LED Sinking Current IOL VDD =3V VO =1.5V Input High Level Voltage VIH 0.7 VDD VDD V Input Low Level Voltage VIL 0 0.3 VDD V fOSC 400 455 800 kHz 40 50 60 kΩ Oscillation Frequency Pull-down Resistor Rd KI0~KI7 Pins HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 10 mA -5 mA REV:1.2 2009.02.17 Page 2 of 15 SC9243 PIN CONFIGURATION VSS 1 20 VDD OSCO 2 19 DOUT OSCI 3 18 LED NC 4 17 CODE KI0 5 16 KO3 KI1 6 15 KO2 KI2 7 14 KO1 KI3 8 13 KO0 KI4 9 12 KI7 KI5 10 11 KI6 PIN DESCRIPTION Pin No. Symbol Description 1 VSS 2 OSCO Oscillator Output Pin with Built-in Amplifier Circuit and Feedback Resistor 3 OSCI Oscillator Input Pin with Built-in Amplifier Circuit and Feedback Resistor 4 NC 5~12 KI0~KI7 13~16 KO0~KO3 Key Scan Output Pins. 17 CODE Code Scan Output Pin. 18 LED Transmission Display Output Pin 19 DOUT Infrared LED Driving Output Pin 20 VDD Negative Power Supply not connected Key Matrix Input Pins. built-in pull-down resistor(80kΩ) Positive Power Supply HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 3 of 15 SC9243 FUNCTIONAL DESCRIPTION 1. TRANSMISSION CODE The transmission code consists of a leader code, 16 bits system code, and 8 bits data code. The inverse of the data code is also sent simultaeously. The following diagram shows this one frame construction. It should be noted that System Code Bit 7(S7) has a fixed value of “1”. The leader code consists of a 4.5 ms carrier waveform followed by a 4.5 ms OFF waveform. It is used as the leader for the following codes. Thus, when reception is configured by a microcomputer, the time relationship between the detection of the reception and the 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. 2. REMOTE OUTPUT WAVEFORMS SC9243 Remote Output Waveforms are given in the diagram below.(for fosc=455KHz) When oscillation frequency is 455 KHz, a signal is outputted after pulse is modulated by 38 KHz of duty 1/3 (which is 1/12 of the carrier generation circuit). Note: In preparing the firmware of the receiving circuit, please strictly follow the following instructions: 1. System Codes: The same code is transmitted twice and therefore, always decode these 2 codes and check if they are in agreement with each other. 2. Key Data Codes: The Key Data Code and its inversed code are always transmitted together, therefore, check if they are in agreement with each other. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 4 of 15 SC9243 3. KEY MATRIX SC9243 enables the maximum setting of up to 32 keys through a combination of KI0 to KI7 and KO0~KO3. Furthermore, the System Codes are settable in 7 bits through the combination of KI0~KI6 and Code Key. Please refer to the diagram below: Key Nos.K8,16,24 and 32 (the Shift Keys ) can be pressed simultaneously or in any random order with other keys (normal keys). The system code setting is constructed by connecting the diode jumper between Code Key and KI0~KI6 keys. With the diode jumper, the system code will have the value of “1”. If Code and any one of the KI0~KI6 keys are connected only at one point, the diode jumper may be disregarded. 4.LED TERMINAL When there is no key activity, the LED Pin is in the HIGH Level. Please refer to the diagram below. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 5 of 15 SC9243 SC9243 DATA CODE MAP 1 (ONE KEY PRESSED) Key KO No. Port KI Port D0 D1 D2 D3 D4 D5 D6 D7 K1 KI0 1 0 0 0 0 0 0 0 K2 KI1 0 1 0 0 0 0 0 0 K3 KI2 1 1 0 0 0 0 0 0 KI3 0 0 1 0 0 0 0 0 KI4 1 0 1 0 0 0 0 0 K6 KI5 0 1 1 0 0 0 0 0 K7 KI6 1 1 1 0 0 0 0 0 K8 KI7 0 0 0 0 0 1 0 0 K4 K5 KO0 K9 KI0 1 0 0 1 0 0 0 0 K10 KI1 0 1 0 1 0 0 0 0 K11 KI2 1 1 0 1 0 0 0 0 KI3 0 0 1 1 0 0 0 0 KI4 1 0 1 1 0 0 0 0 K14 KI5 0 1 1 1 0 0 0 0 K15 KI6 1 1 1 1 0 0 0 0 K16 KI7 0 0 0 0 0 1 1 0 K17 KI0 1 0 0 0 1 0 0 0 K18 KI1 0 1 0 0 1 0 0 0 K19 KI2 1 1 0 0 1 0 0 0 KI3 0 0 1 0 1 0 0 0 KI4 1 0 1 0 1 0 0 0 K22 KI5 0 1 1 0 1 0 0 0 K23 KI6 1 1 1 0 1 0 0 0 K24 KI7 0 0 0 0 0 1 0 1 K25 KI0 1 0 0 1 1 0 0 0 K26 KI1 0 1 0 1 1 0 0 0 K27 KI2 1 1 0 1 1 0 0 0 KI3 0 0 1 1 1 0 0 0 KI4 1 0 1 1 1 0 0 0 K30 KI5 0 1 1 1 1 0 0 0 K31 KI6 1 1 1 1 1 0 0 0 K32 KI7 0 0 0 0 0 1 1 1 K12 K13 K20 K21 K28 K29 KO1 KO2 KO3 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 6 of 15 SC9243 SC9243 DATA CODE MAP 2 (WHEN SHIFT KEY K8 + OTHER KEYS ARE PRESSED) Key KO No. Port KI Port D0 D1 D2 D3 D4 D5 D6 D7 K1 KI0 1 0 0 0 0 1 0 0 K2 KI1 0 1 0 0 0 1 0 0 K3 KI2 1 1 0 0 0 1 0 0 KI3 0 0 1 0 0 1 0 0 K4 K5 KO0 KI4 1 0 1 0 0 1 0 0 K6 KI5 0 1 1 0 0 1 0 0 K7 KI6 1 1 1 0 0 1 0 0 K8 KI7 K9 KI0 1 0 0 1 0 1 0 0 K10 KI1 0 1 0 1 0 1 0 0 K11 KI2 1 1 0 1 0 1 0 0 K12 KI3 0 0 1 1 0 1 0 0 KI4 1 0 1 1 0 1 0 0 K14 KI5 0 1 1 1 0 1 0 0 K15 KI6 1 1 1 1 0 1 0 0 K16 KI7 K17 KI0 1 0 0 0 1 1 0 0 K18 KI1 0 1 0 0 1 1 0 0 K19 KI2 1 1 0 0 1 1 0 0 KI3 0 0 1 0 1 1 0 0 KI4 1 0 1 0 1 1 0 0 K22 KI5 0 1 1 0 1 1 0 0 K23 KI6 1 1 1 0 1 1 0 0 K24 KI7 K25 KI0 1 0 0 1 1 1 0 0 K26 KI1 0 1 0 1 1 1 0 0 K27 KI2 1 1 0 1 1 1 0 0 KI3 0 0 1 1 1 1 0 0 KI4 1 0 1 1 1 1 0 0 K30 KI5 0 1 1 1 1 1 0 0 K31 KI6 1 1 1 1 1 1 0 0 K32 KI7 K13 K20 K21 K28 K29 KO1 KO2 KO3 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 7 of 15 SC9243 SC9243 DATA CODE MAP 3 (WHEN SHIFT KEY K16+OTHER KEYS ARE PRESSED) Key KO KI No. Port Port D0 D1 D2 D3 D4 D5 D6 D7 K1 KI0 1 0 0 0 0 1 1 0 K2 KI1 0 1 0 0 0 1 1 0 K3 KI2 1 1 0 0 0 1 1 0 KI3 0 0 1 0 0 1 1 0 K4 K5 KO0 KI4 1 0 1 0 0 1 1 0 K6 KI5 0 1 1 0 0 1 1 0 K7 KI6 1 1 1 0 0 1 1 0 K8 KI7 K9 KI0 1 0 0 1 0 1 1 0 K10 KI1 0 1 0 1 0 1 1 0 K11 KI2 1 1 0 1 0 1 1 0 K12 KI3 0 0 1 1 0 1 1 0 KI4 1 0 1 1 0 1 1 0 K14 KI5 0 1 1 1 0 1 1 0 K15 KI6 1 1 1 1 0 1 1 0 K16 KI7 K17 KI0 1 0 0 0 1 1 1 0 K18 KI1 0 1 0 0 1 1 1 0 K19 KI2 1 1 0 0 1 1 1 0 KI3 0 0 1 0 1 1 1 0 KI4 1 0 1 0 1 1 1 0 K22 KI5 0 1 1 0 1 1 1 0 K23 KI6 1 1 1 0 1 1 1 0 K24 KI7 K25 KI0 1 0 0 1 1 1 1 0 K26 KI1 0 1 0 1 1 1 1 0 K27 KI2 1 1 0 1 1 1 1 0 KI3 0 0 1 1 1 1 1 0 KI4 1 0 1 1 1 1 1 0 K30 KI5 0 1 1 1 1 1 1 0 K31 KI6 1 1 1 1 1 1 1 0 K32 KI7 K13 K20 K21 K28 K29 KO1 KO2 KO3 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 8 of 15 SC9243 SC9243 DATA CODE MAP 4 (WHEN SHIFT KEY K24+OTHER KEYS ARE PRESSED) Key KO KI No. Port Port D0 D1 D2 D3 D4 D5 D6 D7 K1 KI0 1 0 0 0 0 1 0 1 K2 KI1 0 1 0 0 0 1 0 1 K3 KI2 1 1 0 0 0 1 0 1 KI3 0 0 1 0 0 1 0 1 KI4 1 0 1 0 0 1 0 1 K6 KI5 0 1 1 0 0 1 0 1 K7 KI6 1 1 1 0 0 1 0 1 K8 KI7 K9 KI0 1 0 0 1 0 1 0 1 K10 KI1 0 1 0 1 0 1 0 1 K11 KI2 1 1 0 1 0 1 0 1 KI3 0 0 1 1 0 1 0 1 KI4 1 0 1 1 0 1 0 1 K14 KI5 0 1 1 1 0 1 0 1 K15 KI6 1 1 1 1 0 1 0 1 K16 KI7 K17 KI0 1 0 0 0 1 1 0 1 K18 KI1 0 1 0 0 1 1 0 1 K19 KI2 1 1 0 0 1 1 0 1 KI3 0 0 1 0 1 1 0 1 KI4 1 0 1 0 1 1 0 1 K22 KI5 0 1 1 0 1 1 0 1 K23 KI6 1 1 1 0 1 1 0 1 K24 KI7 K25 KI0 1 0 0 1 1 1 0 1 K26 KI1 0 1 0 1 1 1 0 1 K27 KI2 1 1 0 1 1 1 0 1 KI3 0 0 1 1 1 1 0 1 KI4 1 0 1 1 1 1 0 1 K30 KI5 0 1 1 1 1 1 0 1 K31 KI6 1 1 1 1 1 1 0 1 K32 KI7 K4 K5 K12 K13 K20 K21 K28 K29 KO0 KO1 KO2 KO3 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 9 of 15 SC9243 SC9243 DATA CODE MAP 5 (WHEN SHIFT KEY K32+OTHER KEYS ARE PRESSED) Key KO No. Port KI Port D0 D1 D2 D3 D4 D5 D6 D7 K1 KI0 1 0 0 0 0 1 1 1 K2 KI1 0 1 0 0 0 1 1 1 K3 KI2 1 1 0 0 0 1 1 1 KI3 0 0 1 0 0 1 1 1 K4 K5 KO0 KI4 1 0 1 0 0 1 1 1 K6 KI5 0 1 1 0 0 1 1 1 K7 KI6 1 1 1 0 0 1 1 1 K8 KI7 K9 KI0 1 0 0 1 0 1 1 1 K10 KI1 0 1 0 1 0 1 1 1 K11 KI2 1 1 0 1 0 1 1 1 K12 KI3 0 0 1 1 0 1 1 1 KI4 1 0 1 1 0 1 1 1 K14 KI5 0 1 1 1 0 1 1 1 K15 KI6 1 1 1 1 0 1 1 1 K16 KI7 K17 KI0 1 0 0 0 1 1 1 1 K18 KI1 0 1 0 0 1 1 1 1 K19 KI2 1 1 0 0 1 1 1 1 KI3 0 0 1 0 1 1 1 1 KI4 1 0 1 0 1 1 1 1 K22 KI5 0 1 1 0 1 1 1 1 K23 KI6 1 1 1 0 1 1 1 1 K24 KI7 K25 KI0 1 0 0 1 1 1 1 1 K26 KI1 0 1 0 1 1 1 1 1 K27 KI2 1 1 0 1 1 1 1 1 KI3 0 0 1 1 1 1 1 1 KI4 1 0 1 1 1 1 1 1 K30 KI5 0 1 1 1 1 1 1 1 K31 KI6 1 1 1 1 1 1 1 1 K32 KI7 K13 K20 K21 K28 K29 KO1 KO2 KO3 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 10 of 15 SC9243 TYPICAL APPLICATION CIRCUIT VDD IR LED NPN(C945) 1Ω VDD 47μF LED 20 VDD 16 15 14 13 12 11 DOUT LED CODE KO3 19 18 17 KO2 KO1 KO0 KI7 KI6 SC9243 VSS OSCO OSCI 1 2 3 NC KI0 KI1 KI2 KI3 KI4 KI5 4 5 6 7 8 9 10 455 KHz 100pF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 100pF Push Button Switch Switch IN4148 For System Code Selection HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 11 of 15 SC9243 PCB WIRE LAYOUT SCHEMATIC 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. * It is recommended to separate power line and ground line for transmit and IC and overstriking. * The emitter of triode connect 1Ω resistor at least. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 12 of 15 SC9243 PACKAGE OUTLINE SOP-20-375-1.27 UNIT: mm 9.525 7.6±0.3 UNIT: mm 10.2±0.4 DIP-20-300-2.54 0.25±0.05 1.27 0.4 3.1MAX 12.7±0.25 11.43 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 13 of 15 SC9243 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. Disclaimer: • Silan reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! • All semiconductor products malfunction or fail with some probability under special conditions. When using Silan products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such Silan products could cause loss of body injury or damage to property. • Silan will supply the best possible product for customers! HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.2 2009.02.17 Page 14 of 15