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| SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER GENERAL DESCRIPTION The SM5262B is a RF remote control encoder paired with SM5272B. It utilizes CMOS technology. The chip has 12 bits of 3-state address pins that provides 312 codes. SM5262B/ SM5272B pair is suitable for use on remote controller. FEATURES * CMOS technology * Low power consumption * 12 tri-state pins * Wide range operating voltage, Vcc = 2.5-12V * Up to six data bits * High noise immunity APPLICATIONS * Garage Door * Ceiling Fan * Toys PIN ASSIGNMENTS A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 Vss 1 2 3 4 5 6 7 8 9 SM5262B 18 17 16 15 14 13 12 11 10 VDD Dout OSC1 OSC2 TE A11/D0 A10/D1 A9/D2 A8/D3 A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 Vss NC 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD Dout OSC1 OSC2 TE A11/D0 A10/D1 A9/D2 A8/D3 NC SM5262BS Page 1 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 Vss 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VDD Dout OSC1 OSC2 LED A11/D0 A10/D1 A9/D2 A8/D3 A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 Vss NC 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD Dout OSC1 OSC2 LED A11/D0 A10/D1 A9/D2 A8/D3 NC SM5262B-DX SM5262BS-DX BLOCK DIAGRAM Vss VDD OSC2 System Timing Generator A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 A8/D3 A9/D2 A10/D1 A11/D0 OSC OSC1 Control Logic Address TE LED Code Generator Output Driver Dout Page 2 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER PIN FUNCTION No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 LED 15 16 17 18 OSC1 OSC2 Dout VDD O I O O POWER LED Output. Resistor connected between these two pins determine the system clock. Serial output of encoded signals. Positive power supply. Pin Name A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 VSS A8/D3 A9/D2 A10/D1 A11/D0 TE I/O I I I I I I I/O Address input or data output. I/O POWER I/O I/O Address input or data output. I/O I/O I Enables transmission. Negative power supply. Address input, each pin can be set to "0", "1" , or floating. Function Operation Page 3 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER FUNCTION DESCRIPTION 1. Data Format OSC BIT "0" *a BIT "1" 3a a BIT "F" *a is 4 OSC Clock TE Dout 12 bits address Sync. Synchronisation Bit waveform is : a 32a Page 4 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER 2. Frame Format When SM5262B is used for no data, transmitting format is : 12 bits address Sync. Synchronisation Bit waveform is : a 32a When data type of SM5262B is used, address bits will decrease accordingly. For example, in 3 data type where address is 9 bits, transmitting format is : 9 address bits 3 data bits Sync. SM5262B/ SM5272B has 12 bits including a maximum of 6 data bits. first transmission bit in real signal A0 will be receive first. A0 A0 A0 A0 A0 A0 A0 A1 A1 A1 A1 A1 A1 A1 A2 A2 A2 A2 A2 A2 A2 A3 A3 A3 A3 A3 A3 A3 A4 A4 A4 A4 A4 A4 A4 A5 A5 A5 A5 A5 A5 A5 A6 A6 A6 A6 A6 A6 D5 A7 A7 A7 A7 A7 D4 D4 A8 A8 A8 A8 D3 D3 D3 A9 A10 A11 A9 A10 A11 A9 D2 D2 D2 D2 D1 D1 D1 D1 D1 D0 D0 D0 D0 D0 Sync. Sync. Sync. Sync. Sync. Sync. Sync. According to SM5272B SM5272B-M2/L2 SM5272B-M3/L3 SM5272B-M4/L4 SM5272B-M5/L5 SM5272B-M6/L6 Page 5 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER Single Resistor Oscillator SM5262B's oscillator be constructed by connecting a resistor between OSC1 and OSC2 pin. SM5272B's OSC frequency must be 1.4 to 6.8 times more than SM5262B. Encoder OSC Frequency 100 90 80 70 60 KHz 50 40 30 20 10 0 2.5 6 9 12 R = 2.7 M R = 3.0 M R = 3.3 M R = 4.3 M R = 1.2 M R = 510K 15 VOLTAGE Decoder OSC Frequency 300 250 200 180 KHz 100 R = 300 K R = 100 K 50 R = 620 K R = 680 K R = 820 K R = 1.0 M 0 2.5 6 9 VOLTAGE Suggested oscillator resistor of SM5262B/ SM5272B: SM5262B 4.7M OHM 3.0M OHM 2.2M OHM 1.2M OHM Page 6 SM5272B 750K OHM 390K OHM 270K OHM 160K OHM OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Input Voltage Output Voltage Maximum power dissipation Operating Temperature Storage Temperature Symbol VDD - Vss VI - Vss VO - Vss Pa Topr Tstg VDD - Vss = 12 V Conditions Ratings -0.3 ~ 16 Vss - 0.3 ~ VDD +0.3 Vss - 0.3 ~ VDD +0.3 Unit V V V mW 500 -20 ~ 70 -40 ~ 125 DC ELECTRICAL CHARACTERISTICS Parameter Supply Voltage Standby Current Symbol VCC ISTB VDD=12V OSC stop AO - A11 open VDD = 5V VOH = 4V VDD = 8V VOH = 6.4V VDD = 12V VOH = 9.6V VDD = 5V VOL = 1V VDD = 8V VOL = 1.6V VDD = 12V VOL = 2.4V -2 -8 -16 7 16 29 Conditions Limit Min. Typ. Max. 2.5 0.02 12 0.3 Unit V g A Output Drive Current (Dout) IOH mA Output Sinking Current (Dout) IOL mA Page 7 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER APPLICATION CIRCUIT VDD A0 A1 A2 A3 A4 A5 A6 A7 Vss VDD Dout OSC1 OSC2 TE A11 A10 A9 A8 SM5262B VDD DI ROSC TEB RF GND ANT VDD A0 A1 A2 A3 A4 A5 A6 A7 Vss VDD Dout OSC1 OSC2 TE A11 A10 A9 A8 SM5262B VDD DI ROSC TEB RF GND ANT RF : Module reference to Page11 Page8 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER APPLICATION CIRCUIT VDD D5 D4 D3 D2 D1 D0 VD D DI RF GND ANT To SM5262B D5 D4 D3 D2 D1 D0 10K[ *6 A0 A1 A2 A3 A4 A5 D5 D4 Vss VDD Dout OSC1 OSC2 TE D0 D1 D2 D3 SM5262B Page 9 ROSC OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER APPLICATION CIRCUIT VDD D5 D4 D3 D2 D1 D0 VDD DI To SM5262B D0 D1 D2 D3 D4 D5 RF GND ANT A0 A1 A2 A3 A4 A5 D5 D4 Vss VDD Dout OSC1 OSC2 LED D0 D1 D2 D3 ROSC SM5262B - DX Page 10 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER APPLICATION CIRCIUT VDD 10g H 25P MPSH10 47K From Encoder's O/P 5P Page 11 OCT. 2001 SM5262B SAMHOP Microelectronics Corp. 312 RF ENCODER ORDERING INFORMATION Part No. SM5262B Package 18 Pin DIP Part No. SM5262BS Package 20 Pin SOP Logo Product No. Empty: DIP TYPE S: SO Package General Type D2: Two data output type D3: Three data output type D4: Four data output type SM5262B S - DX xxx xx Serial Number Date Code ESD Protection Mark Page 12 OCT. 2001 |
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