Silan Semiconductors SC5260 REMOTE CONTROL ENCODER DESCRIPTION The SC5260 is a remote control encoder paired with either SOP-16 SC5260 or SC5272 utilizing COMS Technology. It encodes data and address pins into a serial coded waveform suitable for RF modulation. SC5260 has a maximum of 10 bits tri-state address pins providing up to 59,049 (or 310) address codes; thereby, drastically reducing any code collision and unauthorized code scanning possibilities. SC5260 is one of the first generation of Encoder/ DIP-16 Decoder ICs. When paired with SC5270, this encoder/decoder (SC5260/SC5270) pair can operate at very wide temperature range (see Features). Thus, this very important feature enables your Encoder/Decoder to operate under the worst environmental condition. FEATURES APPLICATIONS * High Performance Technology * Home/Car Security System * Low Power Consumption * Garage Door Controller * Very High Noise Immunity * Remote Fan Controller * Wide Operating Temperature Range: -30°C ~ 70°C * Remote Control Toys * 8 or 10 Tri-State Code Address Pins * Single Resistor Oscillator * Least External Components ODERING INFORMATION SC5260-R4 (S) 16 Pins, DIP (SO) SC5260-R2 (S) 16 Pins, DIP (SO) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 1 2000.12.31 Silan Semiconductors SC5260 BLOCK DIAGRAM A0 SYSTEM TIMING A1 OSC OSC A2 A3 A4 A5 ADDRESS /DATA A6 CONTROL LOGIC A7 A8/D3 A9/D2 D1 CODE GENERATION D0 DOUT PIN CONFIGURATION 16 VCC A0 1 16 VCC A1 2 15 DOUT A1 2 15 DOUT A2 3 14 OSC A2 3 14 OSC A3 4 13 D0 A3 4 A4 5 12 D1 A4 5 A5 6 11 D2 A5 6 11 A9 A6 7 10 D3 A6 7 10 A8 A7 8 9 A7 8 9 VSS SC5260-R2 1 SC5260-R4 A0 13 D0 12 D1 VSS ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Input/Output Voltage Maximum Power Dissipation Symbol Value Unit VCC -0.3 ~ +6.0 V VIN,VOUT -0.3V ~ VCC+0.3V V Pa 500 mW Operating Temperature Topr -30 ~ +70 °C Storage Temperature Tstg -40 ~+125 °C HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2 2000.12.31 Silan Semiconductors SC5260 ELECTRICAL CHARACTERISTICS Parameter Symbol Supply Voltage Test conditions VCC Stand-by Current Isb DOUT Output Driving Current IOH DOUT Output Sinking Current IOL Operation Current Iop Min Typ 1.8 VCC=3V OSC stops All input pins open 0.2 VCC=3V, VOH=1.5V 2.5 VCC=6.0V, VOH=3.0V 10 VCC=3V, VOH=1.5V 4.6 VCC=6.0V, VOH=3.0V 12 VCC=1.8V 0.01 VCC=6.0V 0.50 0.5 Max Unit 6.0 V 0.8 µA mA mA mA PIN DESCRIPTION Pin No. 1~8 Symbol A0~A7 I/O I Description Code Address Pin Nos.0~7 These eight tri-state pins ate detected by SC5260 to determine the encoded waveform bit0~bit7. Each bit can be set to “0”, “1”, or “f”(floating). 10~11 A8/D3~A9/D2 I/PL* Code Address pin Nos.8~9/Data Pin Nos.3~2. These two tri-state pins are detected by SC5260 to determine the encoded waveform bit8~bit9. When these pins ate used as address pins (as in SC5260-R2), they can be set to “0”, “1”, or “f” (floating). When these pins are used as data pins (as in SC5260-R4), they can only be set to “0” or “1”. 12~13 D1, D0 14 OSC I/PL I Data Pin Nos. 1~0. These pins can only be set to “0” or “1”. Oscillator Pin A resistor connected between the OSC Pin and the VCC determines the fundamental frequency of the SC5260. 15 DOUT O Data Output Pin. The encoded waveform is serially outputted to this pin. When SC5260 is not transmitting, DOUT outputs low (VSS) voltage. 16 VCC Positive Power Supply 9 VSS Negative Power Supply Note: PL -- Pull-low Resistor is connected internally PL* -- If those two pins are used as Data Pins (SC5260-R2), pull-low resistor is connected internally; otherwise, no pull-low resistor is connected. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 3 2000.12.31 Silan Semiconductors SC5260 FUNCTIONAL DESCRIPTION SC5260 encodes the code address and data set at A0~A7, A8/D3, A9/D2, D1 and D0 into a special waveform and outputs it to the DOUT when any of the data pins is tied to high. This waveform is fed to the RF Modulator for transmission. The transmitted radio frequency is received by the RF demodulator and reshaped into the special waveform. SC5270 (or SC5272) is then used to decode the waveform and set the corresponding output pin(s). Thus completing a remote control encoding and decoding function. 1. RF Operation 1) Code Bits A Code Bits is the basic component of the encoded waveform, and can be classified as either an AD (Address/Data) Bit or a SYNC (Synchronous) Bit. •Address/Data (AD) Bit Waveform An AD Bit can be designated as Bit “0”, “1”, or “f” if it is in low, high or floating state respectively. One bit waveform consists of 2 pulse cycles. Each pulse cycle has 512 oscillating clock periods. For further details, please refer to the diagram below: ¢ Osc 1 bit = 1024¢ Bit "0" 128¢ Bit "1" 384¢ 128¢ Bit "f" Floating Where: α = Oscillating Clock Period •Synchronous (SYNC.) Bit Waveform The Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below: 1/8 bit width = 128¢ 4 bit width = 4096¢ Note: 1 bit = 1024¢ HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 4 2000.12.31 Silan Semiconductors SC5260 2) Code Word A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync Bit. The 12 AD bits are determined by the corresponding states of A0~A7, A8/D3, A9/D2, D1 and D0 pins at the time of transmission. When the Data Type of SC5260 is used, the address bits will decrease accordingly. For example: In the 4-Data Type where the address has eight (8) bits, the transmitting format is: 8 Address Bits 4 Data Bits Sync. Bit SC5260 has a maximum of ten (10) Address Bits. The following diagram shows the code bits with their corresponding pins. First Bit Transmitted A0 A1 A2 A3 A4 A5 A6 A7 A8/ D3 A9/ D2 D1 D0 SYNC BIT One Complete Code Word 2 Data: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 D1 D0 Sync Bit 4 Data: A0 A1 A2 A3 A4 A5 A6 A7 D3 D2 D1 D0 Sync Bit The Code Bits A0~A7, A8/D3, A9/D2, D1 and D0 are determined by the states set at these pins. For example, when the A0 (Pin No.1) is set to “1” (VCC), the Code Bit A0 is synthesized as “1” bit. In the same manner, when it (A0 Pin) is set to “0” (VSS) or left floating, the Code Bit A0 is synthesized as a “0” or “f” bit respectively. When SC5260 detects “1” on any of the Data Pins, it outputs a Code Word at DOUT. If the Data Pin is still in high state (“1”) the time the Code Word transmission ends, SC5260 outputs the same Code Word. Please refer to the diagram below: DATA PIN 1 Code Word 1 Code Word 1 Code Word 1 Code Word DOUT HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 5 2000.12.31 Silan Semiconductors SC5260 3) Single Resistor Oscillator The built-in oscillator circuitry of SC5260 allows a precision oscillator to be constructed by connecting an external resistor between OSC and VCC pins. For SC5270 (or SC5272) to decode correctly the received waveform, the oscillator frequency of SC5270 (or SC5272) must be 1/16~4 (or 1/16~1/4) times that of the transmitting SC5260. The typical oscillator frequency of SC5270, and SC5272 are shown below: Encoder (SC5260) OSC Frequency Decoder (SC5270) OSC Frequency 500 180 400 160 Frequency (KHz) Frequency (KHz) 140 300 250 R=820K 200 R=1M OSC Resistor = 510K Ohms 120 OSC Resistor = 1.0M Ohms OSC Resistor = 1.2M Ohms 100 OSC Resistor = 2.2M Ohms 80 60 40 R=2M 100 20 0 0 1 2 3 4 5 6 7 8 9 2 4 6 8 10 12 10 Voltage (Vcc) Voltage (Volts) Decoder (SC5272) OSC Frequency 1000 Frequency (KHz) R=100K R=240K 100 R=510K R=1M 10 R=2M 3 6 9 12 15 Voltage Suggested oscillator resistor values are shown below. SC5260 SC5270 SC5272 820kâ 510kâ 1Mâ 1Mâ 620kâ 1.2Mâ 2Mâ 1.2Mâ 2.2Mâ HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 6 2000.12.31 Silan Semiconductors SC5260 OPERATION FLOWCHART Power ON Stand-by Mode NO Data Pin(s) in HIGH State YES 1 Word of Address /Data Transmitted NO Data Pin(s) still in HIGH State YES APPLICATION CIRCUIT Vcc 10H 5p 5p 820K 47K 16 15 14 13 12 11 10 9 6 7 8 SC5260-R4 1 2 3 4 5 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 7 2000.12.31 Silan Semiconductors SC5260 PACKAGE OUTLINE DIP-16-300-2.54 UNIT: mm 7.62 6.40 0.25 2.54 1.50 15 degree 3.30 5.08 3.51 19.4 0.46 SOP-16-225-1.27 UNIT: mm 5.72 3.95 6.00 0.41 1.27 10.20 1.95 9.80 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 8 2000.12.31