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unisonic technologies co., ltd rct02 cmos ic www.unisonic.com.tw 1 of 11 copyright ? 2013 unisonic technologies co., ltd. qw-r502-002. d encoder for remote controller with five functions ? description the chip can be used with the decoder utc rcr02 to provide a complete control functions to the remote-controlled toy. the utc rct02 has five input pins corresponding with the five function buttons i.e, forward, backward, ri ghtward, leftward and turbo. the encoding circuit in the utc rct02 sends digital codes to the two output pins so and sc. the digital codes correspond to the definite function buttons or their combinat ions. the so and sc outputs are used in wireless and infra-red applications respectively. dip-14 sop-14 there is an internal oscillator in the utc 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 utc rct02 and utc rcr02 must be less than 25%. the auto-power-off function is achieved by an internal counter. when the utc rct02 is powered on, the counter is reset and begin to count. any action of push down or re lease 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. pr essing 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 vo ltage range: 2.5 ~ 5.0v *auto-power-off if no press on any button in 4 minutes or continuously press on any button over 4 minutes *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 ? ordering information ordering number package packing lead free halogen free rct02l-d14-t RCT02G-D14-T dip-14 tube rct02l-s14-t rct02g-s14-t sop-14 tube rct02l-s14-r rct02g-s14-r sop-14 tape reel
rct02 cmos ic unisonic technologies co., ltd 2 of 11 www.unisonic.com.tw qw-r502-002. d ? pin configuration ? pin description 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 select ed, 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 select ed, 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 v dd 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 ? block diagram
rct02 cmos ic unisonic technologies co., ltd 3 of 11 www.unisonic.com.tw qw-r502-002. d ? absolute maximum ratings parameter symbol value unit dc input voltage v in -0.5 ~ +5.5 v supply voltage to ground potential (inputs &v dd only) -0.5 ~ +5.5 v supply voltage to ground potential (o utputs & d/o only) -0.5 ~ +5.5 v dc output current i out 20 ma power dissipation p d 500 mw ambient temperature with power applied t a -10 ~ +40 ? c storage temperature t stg -25 ~ +85 ? c ? dc electrical characteristics (over the operating rating, t a = -10 ? c~ +40 ? c, v dd =4.0v 10%) parameter symbol test conditions min typ max unit operating voltage v dd 2.5 4.0 5.0 v 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 low voltage v ol i out =150 a 0.5 v output high current i oh v out =1.4v -4.0 ma supply current i dd output unloaded 300 a standby current i stb off state 10 a input current i in pin 1,4,5,6,14 60 a output low current i ol v out =0.5v 150 a ? ac electrical characteristics (over the operating rating, t a = -10 ? c ~ +40 ? c, v dd = 4.0v 10%) parameter symbol test conditions min typ max unit oscillator frequency (note 1) f osc t a =25 ? c, r=200k ? 102 128 154 khz 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. 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 2.1 2.4 ms note: 1. the relative error between the frequencies of the two on-chip oscillators in the utc rct02 and utc rcr02 must be less than 25%. 2. when adjust the external oscillator resistor, the auto-power-off time will vary relevantly.
rct02 cmos ic unisonic technologies co., ltd 4 of 11 www.unisonic.com.tw qw-r502-002. d ? code format (w1 is used for function codes, w2 for start codes) w1 w1: 1 khz 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 1st word 2nd word function codes end codes last word 1 2 3 14 15 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
rct02 cmos ic unisonic technologies co., ltd 5 of 11 www.unisonic.com.tw qw-r502-002. d ? pc output timing note: there is no press on any function button.
rct02 cmos ic unisonic technologies co., ltd 6 of 11 www.unisonic.com.tw qw-r502-002. d ? block diagram of application circuit (1) 1 2 3 4 5 6 7 14 13 12 11 10 9 rightb off leftb osci testb gnd osco back pc for v dd turbob so sc 8 5~ 12v power off rf transmitter + utc rct02 note: 1.the power supply for above circuit should be 5.0v ~ 12v. 2. this circuit is for wireless application.
rct02 cmos ic unisonic technologies co., ltd 7 of 11 www.unisonic.com.tw qw-r502-002. d ? block diagram of application circuit (2) 1 2 3 4 5 6 7 14 13 12 11 10 9 rightb off leftb osci testb gnd osco back pc for v dd turbob so sc 8 2.5 ~ 5.0v power off rf transmitter utc rct02 note: 1.the power supply for above circuit should be 2.5v ~ 5.0v. 2. this circuit is for wireless application.
rct02 cmos ic unisonic technologies co., ltd 8 of 11 www.unisonic.com.tw qw-r502-002. d ? block diagram of application circuit (3) 1 2 3 4 5 6 7 14 13 12 11 10 9 rightb off leftb osci testb gnd osco back pc for v dd turbob so sc 8 5~12v power off + + infra -red diodes rct 02 utc note: 1. the power supply for above circuit should be 5.0v ~ 12v. 2. this circuit is for infra-red application.
rct02 cmos ic unisonic technologies co., ltd 9 of 11 www.unisonic.com.tw qw-r502-002. d ? block diagram of application circuit (4) note: 1.the power supply for above circuit should be 2.5v~ 5.0v. 2. this circuit is for infra -red application.
rct02 cmos ic unisonic technologies co., ltd 10 of 11 www.unisonic.com.tw qw-r502-002. d ? typical application for transimit circuit with 9v battery 1 + 2 3 4 5 6 7 14 13 12 11 10 9 rightb off leftb osci testb gnd osco back pc for v dd turbob so sc 8 s1 s2 s3 s4 s5 s6 power off r7 200k r12 10m c12 0.01u c11 4.7u v7 4148 v4 4.7v r9 330 r3 220k cr1 27.145 v2 9014 r6 100 l1 2.2u r4 6.8k r10 1k c8 0.02u c3 47 c7 68 c9 68 r5 3 . 3k v1 9014 v3 led r2 4.7k l2 2.2u v6 9013 r8 3.9k v5 8550 r11 10m b1 9v a1 antenna l4 6.8u c1 100 c2 150 c4 150 c6 0.2 u r1 100 l3
rct02 cmos ic unisonic technologies co., ltd 11 of 11 www.unisonic.com.tw qw-r502-002. d ? typical application for transimit circuit with 9v battery v2 9014 l1 2.2u r9 330 b1 9v c12 01u c3 47 c8 02u r7 200k r6 100 1 2 3 4 5 6 7 14 13 12 11 10 9 rightb off leftb osci testb gnd osco back pc for v dd turbob so sc 8 c11 3.3u v4 4.2v c7 68 r3 220k a1 anitenna l2 2.2u l4 6.8u c 4 150 l3 c1 100 v1 9014 r5 33k r1 100 c6 0.2u c9 68 r4 6.8k cr1 27.145 utc rct 0 2 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.

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