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| SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER DESCRIPTION SM5212D is a remote control decoder paired with SM5212E utilizing CMOS Technology. It has 12-bit 2-state address pins providing a 2 12 address codes; thereby, drastically reducing any code collision and unauthorized code scanning possibilities. SM5212D is available in several options to suit every application needs : variable number of data output pins, latch or momentary output type. FEATURES CMOS Technology Low Power Consumption Very High Noise Immunity Up to 12 2-State Code Address Pins Wide Range of Operating Voltage: Vcc = 3 ~ 12 Volts * Single Resistor Oscillator * Available in DIP and SOP Package * * * * * APPLICATIONS * * * * * Car Security Garage Door Home Security/Automation System Toys Remote Control for Industrial Use PIN CONFIGURATION ( DIP ) A0 A1 A2 A3 A4 A5 A6 A7 Vss 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 Vcc VT OSC1 OSC2 DIN A11/D0 A10/D1 A9/D2 A8/D3 NC A0 A1 A2 A3 A4 A5 A6 A7 Vss 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 NC Vcc VT OSC1 OSC2 DIN A11/D0 A10/D1 A9/D2 A8/D3 SM5212D SM5212D-S Page 1 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER BLOCK DIAGRAM OSC2 OSC1 Oscillator Divider Data Shift Register . . . . Latch Circuit . . . . Data DIN Buffer Data Detector Sync. Detector Comparator Comparator Control Logic Transmission Gate Circuit Buffer VT .......... Address VDD VSS Page 2 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER PIN DESCRIPTION NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PIN NAME A0 A1 A2 A3 A4 A5 A6 A7 VSS D3 D2 D1 D0 DI OSC1 OSC2 VT VDD I/O I I I I I I I I POWER O O Address/Data output active high. O O I I O O POWER Receive from RF module. Resistor connected between these two pins determine the system clock. Valid transmission indication. Positive power supply. Negative power supply. Address input , each pin can be set to "0' , "1". FUNCTION Page 3 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER Decoder with Data Output Pins Power On After Power On SM5212D is set in Address search mode, if SM5212D finds 3 consecutive Address that matches the Standby Mode Address setting of SM5212D. SM5038RF will enter Data Compare Disable VT & ignore the rest of this word NO Code In? mode. It will compare perviously 3 received data, if they match then SM5212D will set VT high and send data YES Address Bits Matched? YES NO O/P. Store Data Match previous stored data? YES NO NO 3 times of checking completed ? YES Latch data to output & activate VT NO Address or data error? YES Page 4 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER Single Resistor Oscillator SM5212D's oscillator can be constructed by connecting a resistor between OSC1 and OSC2 pin. Encoder OSC Frequency KHz 350 300 43K 51K 250 68K 200 82K 100K 150 150K 100 180K 50 0 3 4 5 6 7 8 9 10 11 12 VOLTAGE ~ The recommended oscillator frequency is FOSCD (SM5212D decoder)=10 FOSCD (SM5212E encoder) Page 5 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Input Voltage Operating Temperature Storage Temperature Symbol VI - Vss Vss - VDD Topr Tstg VDD - Vss = 12V Conditions Ratings -0.3~13 Vss-0.3~VDD+0.3 -20~75 -50~125 Unit V V oC oC DC ELECTRICAL CHARACTERISTICS (Ta=25 oC) PARAMETER Operating Voltage Standby Current Operating Current Data Output Source Current (D8~D11) Data Output Sink Current (D8~D11) VT Output Source Current SYMBOL VDD ISTB IDD IO IO IVT VIH VIL FOCS CONDITIONS LIMIT MIN. 2.4 -1 1 -1 1 3.5 0 TYP. 5 0.1 2 200 -1.6 1.6 -1.6 1.6 150 MAX. 12 1 4 400 5 1 - UNIT V VDD=5V OSC stop VDD=12V OSC stop VDD=5V No load Fosc=150kHz VDD=5V VOH=4.5V VDD=5V VOL=0.5V VDD=5V VOH=4.5V VDD=5V VOL=0.5V - (VDD=5V) - (VDD=5V) VDD=5V ROSC=51k A A A mA mA mA mA V V kHz VT Output Sink Current "H" Input Voltage "L" Input Voltage Oscillator Frequency Page 6 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER APPLICATION CIRCUIT RF Receiver VDD A0 A1 A2 A3 A4 A5 A6 A7 VSS VDD VT OSC1 OSC2 DIN D0 D1 D2 D3 VT ROSC SM5212D Page 7 V1.0 SM5212D SAMHOP Microelectronics Corp. 212 RF DECODER ORDERING INFORMATION Part NO. SM5212D Package 18Pin DIP Part NO. SM5212D-S Package 20Pin SOP Logo Product No. D:DIP TYPE D-S:SO Package SM5212 XX xxx xx Serial Number Date Code ESD Protection Mark Page 8 V1.0 |
Price & Availability of SM5212D-S
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