UTC RCT02 CMOS IC Encoder For Remote Controller With Five Functions DESCRIPTION The chip can be used with the decoder RCR02 to provide a complete control functions to the remote-controlled toy. The RCT02 has five input pins corresponding with the five function buttons i.e, forward, backward, rightward, leftward and turbo. The encoding circuit in the RCT02 sends digital codes to the two output pins SO and SC. The digital codes correspond to the definite function buttons or their combinations. The SO and SC outputs are used in wireless and infra-red applications respectively. There is an internal oscillator in the RCT02. By adding an external resistor conveniently, the oscillator will be constructed. The oscillator frequency can be adjusted by the external resistor. The relative error between the frequencies of the two on chip oscillators in the RCT02 and RCR02 must be less than ±25%. SOP-14 DIP-14 The auto-power-off function is achieved by an internal counter. When the RCT02 is powered on, the counter is reset and begin to count. Any action of push down or release the function button also reset the counter. The PC pin will keep on a high level until the counter counts up to about 4 minutes. The PC output is used to control on/off state of the external power supply. Pressing OFF button can also shut down the power supply. Press on any function button will wake up the chip promptly. FEATURES *Five input pins used for five control buttons *Operating power-supply voltage range: 2.5 to 5.0V *Auto-power-off if no press on any button in 4 minutes or continuously press on any button over 4 minues *Manual-power-on/off with ON/OFF button *One output pin used for external power control *Press on any button as wake up *On-chip oscillator with an external resistor *Low operating current *Few external components needed UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R502-002,C UTC RCT02 CMOS IC Logic Block Diagram OFF OSCI Oscillator Timing Generator 4 Minutes Counter Input Circuit Encoding Circuit Output Circuit OSCO PC RIGHTB LEFTB TURBOB SO FORWARDB BACKWARDB SC Product Pin Configuration and Pin Description Pin No. Pin Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 RIGHTB TESTB GND BACKWARDB FORWARDB TURBOB SC SO VDD PC OSCO OSCI OFF LEFTB UTC RIGHTB 1 14 LEFTB TESTB 2 13 OFF GND 3 12 OSCI BACKWARDB 4 11 OSCO FORWARDB 5 10 PC TURBOB 6 9 VDD SC 7 8 SO Description The rightward function will be selected, if this pin is connected to GND This pin is used for testing mode Negative power supply The backward function will be selected, if this pin is connected to GND The forward function will be selected, if this pin is connected to GND The turbo function will be selected, if this pin is connected to GND Output pin of the encoding signal with carrier frequency Output pin of the encoding signal without carrier frequency Positive power supply Power control output pin Oscillator output pin Oscillator input pin This pin is used to shut down the external power supply The leftward function will be selected, if this pin is connected to GND UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R502-002,C UTC RCT02 CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VALUE DC Input Voltage Supply Voltage to Ground Potential(Inputs &VDD Only) Supply Voltage to Ground Potential(Outputs &D/O Only) DC Output Current Power Dissipation Ambient Temperature With Power Applied Storage Temperature VIN -0.5 ~ +5.5 -0.5 ~ +5.5 -0.5 ~ +5.5 20 500 -10 to +40 -25 to +85 Io PD TA TSTG UNIT V V V mA mW °C °C DC ELECTRICAL CHARACTERISTICS (Over the operating rating, TA= -10°C~ +40°C,VDD=4.0V±10%) PARAMETER Operating Voltage Supply Current Standby Current Input Current Input Low Voltage Output High Voltage Output High Current Output Low Voltage Output Low Current SYMBOL VDD IDD ISTB IIN VIL VOH IOH VOL IOL TEST CONDITIONS Output unloaded OFF state Pin 1,4,5,6,14 Guaranteed Logic Low Level IOUT=1.0mA VOUT=1.4V IOUT=150µA VOUT=0.5V MIN TYP MAX UNITS 2.5 4.0 5.0 300 10 60 0.5 V µA µA µA V V mA V µA 3.5 -4.0 0.5 150 AC ELECTRICAL CHARACTERISTICS (Over the operating rating, TA= -10°C to +40°C,VDD=4.0V±10%) PARAMETER MIN TYP MAX UNITS Fosc TA=25°C,R=200KΩ 102 128 154 KHz Cycle Time of Function Code TFUN FOSC=102~ 154KHz 0.8 1 1.2 ms Cycle Time of Start Code TSTA FOSC=102~ 154KHz 1.6 21 2.4 ms Carrier Frequency of SC Pin FCSC FOSC=102~ 154KHz 51 64 77 KHz TOFF* FOSC=102~ 154KHz 3.2 4 4.8 min. Oscillator Frequency (Note 1) Time of Auto-Power-Off (Note 2) SYMBOL TEST CONDITIONS Note 1: The relative error between the frequencies of the two on-chip oscillators in the RCT02 and RCR02 must be less than±25%. Note 2: When adjust the external oscillator resistor, the auto-power-off time will vary relevantly. UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R502-002,C UTC RCT02 CMOS IC CODE FORMAT (W1 is used for function codes, W2 for start codes) W1 W1:1KHz 50% Duty Cycle Typical W2 W2: 500Hz 75% Duty Cycle Typical WORD FORMAT Start Code: 4W2 Function Code: n' W1 1 Word ENCODING TIMING W2 W2 W2 W2 (n)’ W1 W2 W2 W2 W2 (n)’ W1 W2 W2 W2 W2 (n)’ W1 W2 W2 W2 W2 (n)’W1- - - - - - - - Press any buttons Encoding output 1 1st word 2nd word Function Codes UTC 2 3 14 15 last word End Codes UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R502-002,C UTC RCT02 CMOS IC Number of Function Codes (n) W1 Function Buttons 4 (End Code) 10 Forward 16 Forward & Turbo 22 Turbo 28 (Turbo/Forward) & Left 34 (Turbo/Forward) & Right 40 Backward 46 Backward & Right 52 Backward & Left 58 Left 64 Right PC Output Timing VDD VDD OFF OFF PC PC 4 Minutes 4 Minutes Note: There is no press on any function button. VDD Press Function buttons PC 4 Minutes UTC 4 Minutes 4 Minutes UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R502-002,C UTC RCT02 CMOS IC BLOCK DIAGRAM OF APPLICATION CIRCUIT (1) 5~12V 1 2 RIGHTB 5 6 7 OFF TESTB 3 4 LEFTB GND OSCI BACK OSCO FOR TURBOB SC PC VDD SO 14 13 POW ER OFF 12 11 10 9 8 + RCT02 RF TRANSMITTER Note: 1.The power supply for above circuit should be 5.0V to 12V. 2.This circuit is for wireless application. UTC UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R502-002,C UTC RCT02 CMOS IC BLOCK DIAGRAM OF APPLICATION CIRCUIT (2) 2.5~5.0V 1 2 3 4 5 6 7 RIGHTB TESTB LEFTB OFF OSCI GND BACK OSCO PC FOR TURBOB VDD SC SO 14 13 POW ER OFF 12 11 10 9 8 ﹢ RCT02 RF TRANSMITTER Note: 1.The power supply for above circuit should be 2.5V to 5.0V. 2. This circuit is for wireless application. UTC UNISONIC TECHNOLOGIES CO., LTD. 7 QW-R502-002,C UTC RCT02 CMOS IC BLOCK DIAGRAM OF APPLICATION CIRCUIT (3) 5~12V RCT02 1 2 3 4 5 6 7 RIGHTB TESTB GND BACK FOR TURBOB SC LEFTB OFF OSCI OSCO PC VDD SO 14 13 POW ER OFF 12 11 10 9 8 INFRA-RED DIODES + + Note: 1.The power supply for above circuit should be 5.0V to 12V. 2.This circuit is for infra-red application. UTC UNISONIC TECHNOLOGIES CO., LTD. 8 QW-R502-002,C UTC RCT02 CMOS IC BLOCK DIAGRAM OF APPLICATION CIRCUIT (4) 2.5~5.0V 1 2 3 4 5 6 7 RIGHTB LEFTB OFF TESTB GND OSCI BACK OSCO FOR TURBOB PC VDD SO SC 14 13 POW ER OFF 12 11 10 9 8 + RCT02 INFRA - RED DIODES + Note: 1.The power supply for above circuit should be 2.5V to 5.0V. 2.This circuit is for infra-red application. UTC UNISONIC TECHNOLOGIES CO., LTD. 9 QW-R502-002,C UTC RCT02 CMOS IC TYPICAL APPLICATION FOR TRANSIMIT CIRCUIT WITH 9V BATTERY R11 10M C12 0.01u S6 R9 330 V5 8550 + POW ER OFF C11 V7 4.7u 4148 R7200K V4 4.7V R12 10M S5 R2 4.7K SO VDD PC L1 2.2u R3 220K 7 SC TURBOB 6 FOR 5 BACK 4 GND 3 TESTB 2 1 RIGHTB RCT02 CR1 27.145 V2 9014 S1 UTC S2 S3 S4 V3 LED R4 6.8K 8 9 10 11 OSCO 12 OSCI 13 OFF LEFTB 14 R10 1K C7 68 C8 0.02u V1 9014 C3 47 C9 68 R5 3.3K V6 9013 R8 3.9K A1 ANTENNA L2 2.2u C4 150 L3 C2 150 R1 100 B1 9V L4 6.8u C1 100 C6 0.2 u R6 100 UNISONIC TECHNOLOGIES CO., LTD. 10 QW-R502-002,C UTC RCT02 CMOS IC C6 0.2u C1 100 R6 100 R4 6.8K V2 9014 R3 CR1 220K 27.145 V4 4.2V 8 SO RCT02 TURBOB SC 7 9 10 PC FOR VDD 6 5 11 OSCO BACK 4 12 OSCI GND 3 TESTB OFF 13 2 1 RIGHTB LEFTB 14 R7 200K B1 9V C12 C11 01U 3.3U R9 330 L1 2.2u C7 68 C3 47 C8 02u c9 68 V1 9014 R5 33K R1 100 C4 L3 150 L2 2.2u L4 6.8u A1 ANITENNA TYPICAL APPLICATION FOR TRANSIMIT CIRCUIT WITH 9V BATTERY UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO., LTD. 11 QW-R502-002,C