深圳市高地电子有限公司 EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD TX2/RX2
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1 REMOTE CONTROLLER WITH FIVE FUNCTIONS General Description The are a pair of CMOS LSIs designed for remote controlled car applications. TX2 Is the transmitter and RX2 is the receiver. They provide five function key to control forward, Backward, Rightward, Leftward and Turbo motions. Beside,a combination of these five motions can be played. RX2 Provide two high effective amplifiers and Enhance Signal Input recognition capacity to enhance remote control distance. Major Core Features:! Wide and low operating voltage range: 2.2V to 5.0V! Typical oscillator frequency: RF:128KHz. IR :114KHz(Carrier Frequency:57KHz). IR : 76KHz(Carrier Frequency:38KHz).! Provide two transmissive interface(rf and IR)for different application.! RX2 Provide two high effective amplifiers to enhance remote control distance.! Enhance Signal Input recognition capacity for very weak signal.! Auto Power-OFF function for TX2! Low Standby current (TX2) and low operating current.(rx2).! Oscillator with an external resistor. Peripheral Features:! 5-function remote controller controlling forward/ backward/ turbo/ right/ left.! Few external components needed. Application Field:! remote controlled toy.! remote electric appliance controller. 1
2 Special Features Description:! TX2 auto Power OFF function: When input key is pulled low, TX2 will wake up, SC and SO will continuously send out code in RF format (Non-Carrier) and IR format(carrier). However when a complete code is sent out and the key is released,tx2 will automatically into powered off mode.! TX2 IR transmission interface: Built-in counter to generate 38KHz or 57KHz carrier frequency for Infrared applications. Pin Assignment and Block Diagram: Transmitter Pin Assignment TX2C Block Diagram TESTB RIGHTB TESTB LEFTB FOSC Oscillator Timing Generator BACKWARDB FORWARDB TURBOB SC TX2C PC SO RIGHTB LEFTB TURBOB FORWARDB BACKWARDB Latch Circuit Encoding Circuit Logic PC SO SC 2
3 Receiver Pin Assignment RX2C Block Diagram Oscillator Timing Generator VO2 SI RIGHT RX2C VI2 VO1 VI1 TURBO VI1 SI AMP VO1 Decoding Circuit Counter PLA LEFT RDB FORWARD BACKWARD LDB VI2 VO2 LDB RDB Control Logic Latch RIGHT LEFT TURBO BACKWARD FORWARD Absolute Maximum Ratings Comments* DC Supply Voltage...0.3V to 5.0V Input/Output Voltage V to + 0.2V Operating temperature...- C to 60 C Storage Temperature C to 125 C Never allow a stress to exceed the values listed under "Absolute Maximun Ratings", otherwise the device would suffer from a permanent damage. Nor is a stress at the listed value be allowed to persist over a period, since an extended exposure to the absolute maximum rating condition may also affect the reliability of the device, if not causing a damage thereof. 3
4 Electrical Characteristics TX2 (=4.5V, Fosc = 128KHz, T A =25 C, unless otherwise specified.) Parameter Symbol Min. Typ. Max. Operating Voltage 2.2V 4.5V 5.0V Operating Current I dd - - 1mA Stand-by Current I stb - - 1µA DC O/P Driving Current I drive 3mA - - AC O/P Driving Current I drive 3mA - - AC O/P Frequency F audio 500Hz - 1KHz RX2 (=4.5V, Fosc = 128KHz, T A =25 C, unless otherwise specified.) Parameter Symbol Min. Typ. Max. Operating Voltage 2.2V 4.5V 5.0V Operating Current I dd mA O/P Driving Current I drive 0.6mA - - O/P Sinking Current I sink 0.6mA - - Effect Decoding Frequency Variation F tolerance -20% - 20% 4
5 Pin Description TX2 Pin No. Designation Description 1 RIGHTB The rightward function will be selected when this pin is connected to. 2 TESTB This pin is used for testing purpose only. 3 Negative power supply 4 BACKWARDB The backward function will be selected when this pin is connected to. 5 FORWARDB The forward function will be selected when this pin is connected to. 6 TURBOB The turbo function will be selected when this pin is connected to. 7 SC Output pin of the encoding signal with carrier frequency 8 SO Output pin of the encoding signal without carrier frequency 9 Positive power supply PC Power control output pin 11 Oscillator output pin 12 Oscillator input pin 13 FOSC This pin is used for testing purpose. 14 LEFTB The leftward function will be selected when this pin is connected to. RX2 Pin No. Designation Description 1 VO2 Inverter 2 output pin for power amplify 2 Negative power supply 3 SI Input pin of the encoding signal 4 Oscillator input pin 5 Oscillator output pin 6 RIGHT Rightward output pin 7 LEFT Leftward output pin 8 RDB Rightward function is disabled when this pin is connected to. 9 LDB Leftward function is disabled when this pin is connected to. BACKWARD Backward output pin 11 FORWARD Forward output pin 12 TURBO Turbo output pin 5
6 13 Positive power supply 14 VI1 Inverter 1 input pin for power amplify 15 VO1 Inverter 1 output pin for power amplify 16 VI2 Inverter 2 input pin for power amplify Bit Format 1KHz W1 1KHz 50% Duty cycle W2 500Hz 75% Duty cycle Data Format W2 W2 W2 W2 (n) x W1 W2 W2 W2 W2 (n) x W1 W2 W2 W2 W2 Number of Function Codes (n) W1 Function Key Decode Result 4 End Code Forward Forward 16 Forward & Turbo Forward 22 Turbo Turbo 28 Turbo & Forward & Left Forward & Left 34 Turbo & Forward & Right Forward & Right 40 Backward Backward 46 Backward & Right Backward & Right 6
7 52 Backward & Left Backward & Left 58 Left Left 64 Right Right W2 W2 W2 W2 W2 W2 W2 W start code W1 W1 W1 W1 W1 W n-th function code 1 word 7
8 Encode/Decode Timing (A) Any function key Encode output 1st word 2nd word 3rd word end code Decode output 9ms 9ms (B) SI 8 msec (n) W1 8 msec 1 ms Decode output T T= 17 ms + (nw1) x 1 ms 8
9 Typical Application Circuit Transmitter (TX2 Fosc 128 KHz) B500K Ω LEFTB FOSC PC SO SI VCC R.F. Circuit TX2C RIGHTB 1 TESTB BACKWARDB FORWARDB TURBOB SC
10 Receiver (RX2 Fosc 128 KHz) power switch 0 µf VI2 VO1 VI1 TURBO FORWARD BACKWARD 9 LDB 4.3V RX2C VCC R.F. Circuit VO2 1 SI RIGHT LEFT RDB B500KΩ Infrared Application Circuit Transmitter(TX2 Fosc 114 KHz) + DC:3V 0 µ Ω f=114khz Photo Diode LEFTB FOSC PC SO TX2C RIGHTB TESTB BACKWARDB FORWARDB TURBOB SC
11 Recevier(RX2 Fosc 114KHz) 0K DC: 5V µ F VI2 VO1 VI1 TURBO FORWARD BACKWARD RX2C 9 LDB 1815 OUT 57KHz IR Receiver VO2 SI RIGHT LEFT RDB f=114khz Testing Circuit Fosc for TX2 Fosc, RX2 128 ΚΗz FORWARD TURBO BACKWARD 0 µ TX2C RX2C LEFTB RIGHTB BACKWARDB TURBOB FORWARDB RIGHT LEFT 11
12 Bonding Diagram TX2 Designation X Y about 1.24 mm PC SO TX2C SC TURBOB RIGHTB TESTB BACKWARDB FORWARDB TURBOB SC SO PC FOSC LEFTB FOSC FORWARDB BACKWARDB LEFTB RIGHTB TESTB Unit:in um X: 1240 Y: 1240 Note: Substrate is connected to about 1.24 mm 12
13 RX2 Designation X Y about 1.38 mm VO1 VI1 VI2 VO2 NC NC RX2C TURBO FORWARD BACKWARD LDB RDB VO2 NC SI NC RIGHT LEFT RDB LDB BACKWARD FORWARD TURBO NC VI1 VO1 VI SI NC RIGHT LEFT Unit: in um X: 1620 Y: 1380 about 1.62 mm Note: Substrate is connected to 13
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