SC5262

SC5262 SILAN | Alldatasheet

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Technical content

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 REMOTE CONTROL ENCODER

DESCRIPTION

The SC5262 is a remote control encoder paired with SC5272 utilizing CMOS technology. It encodes data and address pins into a serial coded waveform suitable for RF or IR modulation. SC5262 has a maximum of 12-bits of tri-state address pins providing up to 531,441(or 3 12) address codes; thereby, drastically reducing any code collision and unauthorized code scanning possibilities.

FEATURES

• Low power consumption and very high noise immunity * Up to 12 tri-state code address pins or 6 data pins * Wide operating voltage range(Vcc=3V ~ 15V) * Single resistor oscillator * Latch or Momentary output type APPLICATION * Home/automation security system * Remote control toys or for industrial use * Remote control fan * Garage door controller DIP-20 DIP-18 SOP-20

ORDERING INFORMATION

RF: RF Applicatant, normally omitted IR: IR Applicatant S: SOP-20 Package D: DIP-20 Package Omitted: DIP-18 Package PIN CONFIGURATION 1A0 Vss NC Vcc Dout OSC1 OSC2 A11/D0 NC SC5262

18 Pin

20 Pin

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 BLOCK DIAGRAM 87654321 11 12 13 System Timing Control Logic Code Generation Address OSC 17141615 A0 A1 A2 A3 A4 A5 A6/ A7/ A8/ A9/ A10/ A11/ Vss Vcc DoutOSC1OSC2 TE The block diagram is for DIP-18(hereinafter is the same) ABSOLUTE MAXIMUM RATINGS(Ta=25°C) Characteristic Symbol Value Unit Supply Voltage Vcc -0.3 ~ 16.0 V Input Voltage Vi -0.3 ~ Vcc+0.3 V Output Voltage Vo -0.3 ~ Vcc+0.3 V Maximum Power Dissipation(Vcc=12V) Pa 300 mW Operating Temperature Topr -20 ~ +70 °C Storage Temperature Tstg -40 ~ +125 °C

ELECTRICAL CHARACTERISTICS

(Ta=25°C,Vcc=12V,unless otherwise specified) Characteristic Symbol Test Condition Min Typ. Max Unit Supply Voltage Vcc 3 15 V Supply Current Icc Vcc=12V,OSC stops A0~ A11 Open 0.02 0.3 mA Vcc=5V,VOH =3V -3 mA Dout Output driving Current I OH Vcc=8V,VOH =4V -6 mA Vcc=12V,VOH =6V -10 mA Vcc=5V,VOL =3V 2 mA Dout Output sinking Current I OL Vcc=8V,VOL =4V 5 mA Vcc=12V,VOL =6V 9 mA

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 PIN DESCRIPTION Pin No.

18 PIN 20 PIN Pin Name I/O Description

1~6 1~6 A0~A5 I Code Address pins No. 0~5. These six tri-state pins are detected by SC5262 to determine the encoded waveform bit 0 ~bit 5. Each pin can be set to “0”,”1”,”f”(floating). 7~8 10~13 7~8 12~15 A6/D5~A11/D0 I Code Address pinsNo.6~11/data pins No.5~0. These six tri-state pins are detected by SC5262 to determine the encoded waveform bit 6 ~bit 11.When these pins are used as address pins, they can be set to “0”,”1”,”f”.When they are used as data pins ,they can be set only to “0”,”1”. 14 16 TE I Transmission Enable. Active Low Signal.SC5262 outputs the encoded waveform to DOUT when this pins is pulled to LOW. 15 17 OSC1 O Oscillator Pin No.1 16 18 OSC2 I Oscillator Pin No.2 A resistor connected between these two pins determine the fundamental frequency of SC5262. 17 19 DOUT O Data Output Pin. The encoded waveform is serially outputted to this pin. When SC5262 is not transmitting, DOUT outputs low(Vss) voltage. 18 20 Vcc -- Positive Power Supply 9 9 Vss -- Negative Power Supply -- 10~11 NC -- Not Connected FUNCTIONAL DESCRIPTION The SC5262 encodes the code address and data set at A0~ A5 and A6/D5 ~ A11/D0 into a special waveform and outputs it to the Dout whenTE is pulled to “0” (Low state). This waveform is fed to either the RF modulator or the IR transmitter for transmission. The Transmitted radio frequency or infrared ray is received by the RF demodulator or IR receiver and reshaped to the special waveform. SC5272 is then used to decode the waveform and set the corresponding output pins. Thus completing a remote control encoding and decoding function. 1. RF OPERATION Code Bits A code bit is the basic component of the encoded waveform, and can be classified as either an AD(Address/Data) Bit or a SYNC(Synchronous) Bit. 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 two pulse cycles. Each pulse cycle has 16 oscillating time periods. For further details, please refer to the diagram below: The Synchronous bit waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below: 1/8 bit width=4a 4 bit width=128a Note: 1bit =32a

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 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~A5 and A6/D5 ~ A11/D0 pins at the time of

transmission. When Data Type of SC5262 is used , the address bits will decrease accordingly. For example, in the

3 Data Type where the address has 9 bits, the transmitting format is:

9 address bits 3 Data bits Sync. Bit SC5262/SC5272 has a maximum of 12 Address Bits including the 6 Address/Data bits. The following diagram shows the code bits with their corresponding pins. A0 A1 A2 A3 A4 A5 A6 /D5 /D4 /D3 /D2 A10 /D1 A11 /D0

0 D a t a A 0A 1A 2A 3A 4A 5A 6A 7A 8A 9A 1 0 A 1 1 S y n c

1 D a t a A 0A 1A 2A 3A 4A 5A 6A 7A 8A 9A 1 0 D 0S y n c

2 D a t a A 0A 1A 2A 3A 4A 5A 6A 7A 8A 9D 1D 0S y n c

3 D a t a A 0A 1A 2A 3A 4A 5A 6A 7A 8D 2D 1D 0S y n c

4 D a t a A 0A 1A 2A 3A 4A 5A 6A 7D 3D 2D 1D 0S y n c

5 D a t a A 0A 1A 2A 3A 4A 5A 6D 4D 3D 2D 1D 0S y n c

6 D a t a A 0A 1A 2A 3A 4A 5D 5D 4D 3D 2D 1D 0S y n c

The Code Bits A0~A5 and A6/D5 ~ A11/D0 are determined by the states of A0 ~ A5 and A6/D5 ~A11/D0 pins. For example, when the A0(pin 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. Code Frame A Code Frame consists of 4 continuous code Words. When SC5262 detects “0” on theTE (meaning , theTE is active “low”), it outputs a Code frame at Dout. IfTE is still active at the time the Code Frame transmission ends. SC5262 outputs another Code Frame. It should be noted that the Code Frame is synthesized at the time of transmission. TE Dout 1 frame(=4 word) 1f r a m e 1f r a m e Single Resistor Oscillator The Build-in oscillator circuitry of SC5262 allows a precision oscillator to be constructed by connecting an external resistor between OSC1 and OSC2 pins. For SC5272 to decode correctly the received waveform, the oscillator frequency of SC5272 must be 2.5 ~8 times that of transmitting SC5262. The typical oscillator frequency with various resistor values for both SC5262 and SC5272 are shown below:

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 0 3 6 9 12 15 100 Supply Voltage (V) Frequency (kHz) Encoder OSC Frequency 0 3 6 9 12 15 1000 Supply Voltage (V) Frequency (kHz) Decoder OSC Frequency 100 R=510k Ω R=1M Ω R=3.3M Ω R=4.7M Ω R=100k Ω R=240k Ω R=510k Ω R=1M Ω R=2M Ω R=2M Ω Suggested Oscillator resistor values are shown below: 4.7MΩ 820kΩ 3.3MΩ 1.2MΩ 680kΩ 200kΩ SC5262 SC5272 2. IR OPERATION In the IR Type of operation, the functions are similar to the above descriptions except for the output waveform that has a carrier frequency of 38kHz. Details are as follow. Code Bits The Code Bits are further modulated with a 38kHz carrier frequency and can be”0”,”1” or “ f ” bit. Their waveform are shown below: OSC "0" "1" "f" Sync 160λ 20λ 60λ Note:λ=2 clock lengths 620λ Code Word A Code Word is made up of code bits and the format is the same as that of the RF Code Word. Code Frame Likewise, a Code Frame is made up of Code Words and the format is the same as that of RF type of operation.

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 Oscillator The oscillator frequency for the IR type of operation is twice the carrier frequency. Thus, the oscillator frequency should be kept at 76kHz. A 430k~470kW oscillator resistor between OSC1 and OSC2 pins is recommended. It should be noted that the carrier is a 50% duty cycle frequency. OPERATION FLOW CHART Power ON Stand-by Mode TE Enable? TE Enable?

4 Words of

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 TYPICAL APPLICATION CIRCUIT 10kΩ×4 2.7kΩ×41N4148×4 4.7MΩ 4.7kΩ 5pF25pF 10µH LED MPSH10 SW0 SW1 SW2 SW3 +12V 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 SC5262 UHF Band 4 Data Transmitter Circuit is recommended. /G3 4.7MΩ 4.7kΩ 5pF25pF 10µH LED MPSH10 +12V SW 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 SC5262 UHF Band Address-only(o data) Transmitter Circuit is recommended. /G3

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 4.7MΩ 4.7kΩ 5pF25pF 10µH LED MPSH10 +12V SW 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 SC5262 UHF Band Address-only(o data) Zero-stand-by Transmitter Circuit is recommended. /G3 2.7kΩ×4 2.7kΩ 1N4148×4 430kΩ ~ 470kΩ SW0 SW1 SW2 SW3 +4.5V 2.7kΩ 1N4148 1N4148 SW4 SW5 47µF 4.7Ω IR 2SC1815×2 Rosc SC5262-IR 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 Infrared Ray 6-data circuit. Adjust Rosc to get 38kHz carrier pulse at Dout pin is recommended.

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 PACKAGE OUTLINE DIP-18-300-2.54 UNIT: mm 6.40 2.54 3.51 5.083.30 7.62 0.25 15 degree 0.46 22.95 1.50 DIP-20-300-2.54 UNIT: mm 6.40 2.54 3.51 7.62 0.25 15 degree 0.46 22.95 1.50 5.083.30 /G3 /G3 /G3

/G3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD /G3 Rev: 1.0 2000.12.31/G3 SOP-20-225-1.27 UNIT: mm 10.45 7.70 9.53 1.95 18.02 17.62 1.27 0.41 /G3