RCT02 UTC | Alldatasheet
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UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R502-002,C 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%. 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 DIP-14 SOP-14
UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R502-002,C Logic Block Diagram OFF OSCI Oscillator Timing Generator
4 Minutes
Product Pin Configuration and Pin Description PC OSCI OSCO TURBOB OFF SO RIGHTB TESTB FORWARDB BACKWARDB LEFTB1 SC GND VDD Pin No. Pin Name Description
1 RIGHTB The rightward function will be selected, if this pin is connected to GND
2 TESTB This pin is used for testing mode
3 GND Negative power supply
4 BACKWARDB The backward function will be selected, if this pin is connected to GND
5 FORWARDB The forward function will be selected, if this pin is connected to GND
6 TURBOB The turbo function will be selected, if this pin is connected to GND
7 SC Output pin of the encoding signal with carrier frequency
8 SO Output pin of the encoding signal without carrier frequency
9 VDD Positive power supply
10 PC Power control output pin
11 OSCO Oscillator output pin
12 OSCI Oscillator input pin
13 OFF This pin is used to shut down the external power supply
14 LEFTB The leftward function will be selected, if this pin is connected to GND
UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R502-002,C ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VALUE UNIT DC Input Voltage V IN -0.5 ~ +5.5 V Supply Voltage to Ground Potential(Inputs &VDD Only) -0.5 ~ +5.5 V Supply Voltage to Ground Potential(Outputs &D/O Only) -0.5 ~ +5.5 V DC Output Current Io 20 mA Power Dissipation P D 500 mW Ambient Temperature With Power Applied T A -10 to +40 °C Storage Temperature T STG -25 to +85 °C DC ELECTRICAL CHARACTERISTICS (Over the operating rating, TA= -10°C~ +40°C,VDD=4.0V±10%) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Operating Voltage V DD 2.5 4.0 5.0 V Supply Current I DD Output unloaded 300 µA Standby Current I STB OFF state 10 µA Input Current I IN Pin 1,4,5,6,14 60 µA Input Low Voltage V IL Guaranteed Logic Low Level 0.5 V Output High Voltage V OH I OUT=1.0mA 3.5 V Output High Current I OH V OUT=1.4V -4.0 mA Output Low Voltage V OL I OUT=150µA 0.5 V Output Low Current I OL V OUT=0.5V 150 µA AC ELECTRICAL CHARACTERISTICS (Over the operating rating, TA= -10°C to +40°C,VDD=4.0V±10%) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Oscillator Frequency (Note 1) Fosc T A=25°C,R=200KΩ 102 128 154 KHz Cycle Time of Function Code T FUN F OSC=102~ 154KHz 0.8 1 1.2 ms Cycle Time of Start Code T STA F OSC=102~ 154KHz 1.6 21 2.4 ms Carrier Frequency of SC Pin F CSC F OSC=102~ 154KHz 51 64 77 KHz Time of Auto-Power-Off (Note 2) T OFF* F OSC=102~ 154KHz 3.2 4 4.8 min. 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. 4 QW-R502-002,C CODE FORMAT (W1 is used for function codes, W2 for start codes) W1 W1:1KHz 50% Duty Cycle Typical W2: 500Hz 75% Duty Cycle Typical WORD FORMAT Start Code: 4W2 Function Code: n' W1
1 Word
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 1st word 2nd word Function Codes End Codes last word 123 1 4 1 5
UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R502-002,C 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
Note: There is no press on any function button. VDD Press Function buttons PC
4 Minutes 4 Minutes 4 Minutes
UTC UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R502-002,C BLOCK DIAGRAM OF APPLICATION CIRCUIT (1) RIGHTB OFF LEFTB OSCI TESTB GND OSCOBACK PCFOR VDDTURBOB SOSC 8 5~12V POWER OFF RF TRANSMITTER RCT02 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. 7 QW-R502-002,C BLOCK DIAGRAM OF APPLICATION CIRCUIT (2) RIGHTB OFF LEFTB OSCI TESTB GND OSCOBACK PCFOR VDDTURBOB SOSC 8 2.5~5.0V POWER OFF RF TRANSMITTER RCT02 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. 8 QW-R502-002,C BLOCK DIAGRAM OF APPLICATION CIRCUIT (3) RIGHTB OFF LEFTB OSCI TESTB GND OSCOBACK PCFOR VDDTURBOB SOSC 8 5~12V POWER OFF +INFRA-RED DIODES RCT02 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. 9 QW-R502-002,C BLOCK DIAGRAM OF APPLICATION CIRCUIT (4) RIGHTB OFF LEFTB OSCI TESTB GND OSCOBACK PCFOR VDDTURBOB SOSC 8 2.5~5.0V POWER OFF +INFRA - RED DIODES RCT02 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. 10 QW-R502-002,C TYPICAL APPLICATION FOR TRANSIMIT CIRCUIT WITH 9V BATTERY RCT02 RIGHTB OFF LEFTB OSCI TESTB GND OSCOBACK PCFOR VDDTURBOB SOSC 8 S1 S2 S3 S4 S5S6 POWER OFF R7200K R12 10M C12 0.01u C11 4.7u 4148 4.7V 330 220K CR1 27.145 9014 100 2.2u 6.8K R10 0.02u 47C7 68 R5 3.3K 9014 LED 4.7K 2.2u 9013 3.9K 8550 R11 10M ANTENNA 6.8u 100 150 150 0.2 u 100
UTC UNISONIC TECHNOLOGIES CO., LTD. 11 QW-R502-002,C TYPICAL APPLICATION FOR TRANSIMIT CIRCUIT WITH 9V BATTERY 9014 2.2u 330 C12 01U 02u 200K 100 RIGHTB OFF LEFTB OSCI TESTB GND OSCOBACK PCFOR VDDTURBOB SOSC 8 C11 3.3U 4.2V 220K ANITENNA 2.2u 6.8uC4 150 L3 100 9014 33K 100 0.2u 6.8K CR1 27.145 RCT02 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.