TX-2B/RX-2C TOY CAR REMOTE CONTROLLER WITH FIVE FUNCTIONS DESCRIPTION TX-2B The TX-2B/RX-2C is a pair of CMOS LSIs designed for remote controlled car applications. The TX-2B/RX-2C has five control keys for controlling the motions (i.e. forward, backward, rightward, leftward and DIP-14 the turbo function) of the remote controlled car. FEATURES RX-2C TX-2BS RX-2CS DIP-16 SOP-16 * Wide operating voltage range (VCC=1.8V~5.0V when DC-DC is not used and VCC=1.0V~5.0V when DC-DC is used) * Low stand-by current * In order to be used in the low voltage condition, the DC-DC is added in RX-2C; you can decide whether to use DC-DC; the voltage to turn on is 1.0V ; and the voltage to work is 0.8V ; and the output voltage is 3.0V ; ORDERING INFORMATION Device * Auto-power-off function for TX-2B * Few external components are needed Package TX-2B DIP-14-300-2.54 TX-2BS SOP-16-225-1.27 RX-2C DIP-16-300-2.54 RX-2CS SOP-16-225-1.27 BLOCK DIAGRAM OSCI 12 OSCO 11 RIGHT 1 LEFT 14 TURBO 6 FORWARD 5 BACKWARD 4 FOSC TEST B 13 2 Oscillator Timing Generator 9 VDD 10 PC Latch Circuit Encoding Circuit Logic 8 SO 7 SC 3 GND TRANSMITTER TX-2B Block Diagram HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 1 of 13 TX-2B/RX-2C BLOCK DIAGRAM (continued) 4 OSCI Timing generator Oscillator 13 VDD OSCO 5 SI 3 VO1 15 VI1 14 LX 8 VO2 1 10 BACKWARD VI2 16 11 FORWARD Decoding circuit AMP Counter 9 MOD PLA 6 RIGHT DC-DC 7 LEFT latch 12 TURBO 2 GND RECEIVER RX-2C Block Diagram ABSOLUTE MAXIMUM RATINGS Characteristics Symbol Value Unit Supply Voltage VDC 0.3~6.0 V Input / Output Voltage VI/O GND-0.2~VDD+0.2 V Storage Temperature Tstg -10~60 °C TOPR -25~125 °C Operating Temperature ELECTRICAL CHARACTERISTICS 1. TX-2B(VDD=4.5V, Fosc=128 KHz, Tamb=25°C, unless otherwise specified.) Characteristics Symbol Test conditions Min. Typ. Max. Unit 1.8 4.5 5.0 V Operating Voltage VDD Low Voltage input VIL Function input pin -- -- 2.3 V Stand-By Current ISTB No input -- -- 3.0 μA Operating Current IDD Output without load -- -- 0.4 mA SO Driving Current IDRSO Load=0.7V 20 mA SC Driving Current IDRSC Load=0.7V 20 mA PC Driving Current IDRPC Load=0.7V 15 mA RX-2C oscillator 128KHz -20 Tolerance of frequency Ftolerance HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn +20 REV:1.1 % 2008.06.12 Page 2 of 13 TX-2B/RX-2C 2. RX-2C (VDD=4.0V, Fosc=128KHz, Tamb=25°C, DC-DC is not used, unless otherwise specified.) Characteristics Symbol Test conditions Min. Typ. Max. Unit 1.8 4.5 5.0 V -- -- 1.0 mA -- -- mA +20 % Operating Voltage VDD Operating Current IDD Output without load Idrive Load=0.7V 4.5 TX-2B 128KHz -20 Driving Current Tolerance of frequency Ftolerance PIN CONFIGURATION PIN DESCRIPTION 1. TX-2B/TX-2BS Pin No. Symbol Description 1 RIGHT The rightward function will be selected, if this pin is connected to GND 2 2 TEST test pin 3 3 GND Negative power supply 4 4 BACKWARD 5 5 FORWARD 6 6 TURBO 7 7 SC Output pin of the encoding signal with carrier frequency -- 8, 9 NC Not connect TX-2B TX-2BS 1 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 8 10 SO Output pin of the encoding signal without carrier frequency 9 11 VDD Positive power supply 10 12 PC Power control output pin 11 13 OSCO Oscillator output pin 12 14 OSCI Oscillator input pin 13 15 FOSC Oscillate frequency output 14 16 LEFT The leftward function will be selected, if this pin is connected to GND HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 3 of 13 TX-2B/RX-2C 2. RX-2C Pin No. Symbol Description 1 VO2 Inverter 2 output pin for power amplify 2 GND Negative power supply 3 SI 4 OSCI Oscillator input pin 5 OSCO Oscillator output pin 6 RIGHT Rightward output pin 7 LEFT 8 LX 9 MOD 10 BACKWARD Backward output pin 11 FORWARD Forward output pin 12 TURBO TURBO output pin 13 VDD 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 Input pin of the encoding signal Leftward output pin DC-DC output pin Output pin (pull up) to decide the format of output sign, RX-2C is same with RX2 if the pin is high, and if the pin is low, RX-2C output another sign format. FUNCTION DESCRIPTION CODE FORMAT 1. ENCODE RULE (A).Bit Forma (W1 is used for function codes, W2 for start codes) 1KHz W1 1KHz 50% Duty cycle W2 500Hz 75% Duty cycle (B).DATE FORMAT W2 W2 W2 1 W2 W2 W2 2 3 W2 (n) X W1 W2 W2 W2 1 2 3 4 4 W1 W1 W1 W1 start code W2 W2 (n) X W1 W2 W2 W2 W2 W2 W2 W2 W2 W1 n-th W1 n x W1 function code 1 word HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 4 of 13 TX-2B/RX-2C Number Of Function Code (N) W1 Function Key Decode Result 4 End Code 10 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 52 Backward & Left Backward & Left 58 Left Left 64 Right Right 2. ENCODE/DECODE TIMING (A) Any function key Encode output 1st word 2nd word 3rd word 1 2 3 4 5 6 7 8 end code Decode output 9ms 9ms (B) SI (n) W1 8ms 1ms 8ms Decode output T T=17ms+(nW1)x1ms FUNCTION ① Function key（TX-2B） command（RX-2C,MOD=1） ② Command(RX-2C,MOD=0) ③ Over code Over code forward forward Forward pulse（50Hz 50%Duty） Forward and turbo forward Forward and turbo turbo turbo Forward and turbo Forward and turbo and left Forward and left Forward and left Forward pulse（50Hz 50%Duty） (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 5 of 13 TX-2B/RX-2C (Continued) ① ② Function key（TX-2B） command（RX-2C,MOD=1） Forward and turbo and right Forward and right Backward Backward Backward and right Backward and right Backward and left Backward and left Left Left Left Right Right Right Command(RX-2C,MOD=0) ③ Forward and right Forward pulse (50Hz 50%Duty) Backward Backward pulse（50Hz 50%Duty） Backward and right Backward pulse（50Hz 50%Duty） Backward and left Backward pulse（50Hz 50%Duty） Note: when a key is low voltage, it is an input key. ②,③ high voltage format is used when there is no output format. TEST CIRCUIT 100μF The oscillator frequency of TX-2B and RX-2C is 116 ~140 kHz TYPICAL APPLICATION CIRCUIT Transmitter (TX-2B Fosc=116~140kHz) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 6 of 13 TX-2B/RX-2C RECEIVER I (RX-2C FOSC=128 kHz) Note:1. MOD=1(MOD pin opens) 2. No using DC-DC converter because of higher supply voltage 3. Two grade shift gears are realized. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 7 of 13 TX-2B/RX-2C RECEIVER II (RX-2C FOSC=116~140 kHz) Note:1. MOD=0(pulled low) 2. Using DC-DC converter because of low supply voltage 3. Two grade shift gears are realized. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 8 of 13 TX-2B/RX-2C INFRARED APPLICATION CIRCUIT Transmitter (TX-2B Fosc=114 kHz) Receiver (RX-2C Fosc=114 kHz) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 9 of 13 TX-2B/RX-2C PACKAGE OUTLINE DIP-14-300-2.54 UNIT: mm 2.54 1.52 15 degree 19.55±0.3 0.5MIN 0.46 2.40MAX SOP-14-225-1.27 UNIT: mm 0.10～0.20 5.72 3.9±0.2 6.0±0.4 0.60 ± 0.20 1.80MAX 0～7 ° 1.27 0.40 + 0.05 0.20 - 0.02 8.81 ± 0.20 7.62 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 10 of 13 TX-2B/RX-2C PACKAGE OUTLINE (continued) DIP-16-300-2.54 UNIT: mm SOP-16-225-1.27 UNIT: mm HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 11 of 13 TX-2B/RX-2C MOS DEVICES OPERATE NOTES: Electrostatic charges may exist in many things. Please take following preventive measures to prevent effectively the MOS electric circuit as a result of the damage which is caused by discharge: z The operator must put on wrist strap which should be earthed to against electrostatic. z Equipment cases should be earthed. z All tools used during assembly, including soldering tools and solder baths, must be earthed. z MOS devices should be packed in antistatic/conductive containers for transportation. Note：Silan reserves the right to make changes without notice in this specification for the improvement of the design and performance. Silan will supply the best possible product for customers. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2008.06.12 Page 12 of 13