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UTC RCT02
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.
CMOS IC
SOP-14
DIP-14
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
Logic Block Diagram
OFF OSCI Oscillator OSCO
CMOS IC
Timing Generator
4 Minutes Counter
PC
RIGHTB LEFTB TURBOB FORWARDB BACKWARDB Input Circuit Encoding Circuit SO Output Circuit SC
Product Pin Configuration and Pin Description
RIGHTB TESTB GND BACKWARDB FORWARDB TURBOB SC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 LEFTB OFF OSCI OSCO PC VDD SO
Pin No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Pin Name
RIGHTB TESTB GND BACKWARDB FORWARDB TURBOB SC SO VDD PC OSCO OSCI OFF LEFTB
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
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R502-002,C
UTC RCT02
ABSOLUTE MAXIMUM RATINGS
PARAMETER
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
CMOS IC
SYMBOL
VIN
VALUE
-0.5 ~ +5.5 -0.5 ~ +5.5 -0.5 ~ +5.5 20 500 -10 to +40 -25 to +85
UNIT V
V V
Io PD TA TSTG
mA mW
C C
DC ELECTRICAL CHARACTERISTICS (Over the operating rating, TA= -10C~ +40C,VDD=4.0V10%)
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=150A VOUT=0.5V
MIN
2.5
TYP
4.0
MAX
5.0 300 10 60 0.5
UNITS
V A A A V V mA V A
3.5 -4.0 0.5 150
AC ELECTRICAL CHARACTERISTICS (Over the operating rating, TA= -10C to +40C,VDD=4.0V10%)
PARAMETER
Oscillator Frequency
(Note 1)
SYMBOL
Fosc TFUN TSTA FCSC TOFF*
TEST CONDITIONS
TA=25C,R=200K FOSC=102~ 154KHz FOSC=102~ 154KHz FOSC=102~ 154KHz FOSC=102~ 154KHz
MIN
102 0.8 1.6 51 3.2
TYP
128 1 21 64 4
MAX
154 1.2 2.4 77 4.8
UNITS
KHz ms ms KHz min.
Cycle Time of Function Code Cycle Time of Start Code Carrier Frequency of SC Pin Time of Auto-Power-Off
(Note 2)
Note 1: The relative error between the frequencies of the two on-chip oscillators in the RCT02 and RCR02 must be less than25%. 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
CODE FORMAT (W1 is used for function codes, W2 for start codes)
CMOS IC
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 last word
2
3
14
15
End Codes
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R502-002,C
UTC RCT02
Number of Function Codes (n) W1 4 10 16 22 28 34 40 46 52 58 64 Forward Forward & Turbo Turbo (Turbo/Forward) & Left (Turbo/Forward) & Right Backward Backward & Right Backward & Left Left Right Function Buttons (End Code)
CMOS IC
PC Output Timing
VDD OFF PC 4 Minutes
Note: There is no press on any function button.
VDD OFF PC 4 Minutes
VDD Press Function buttons PC
4 Minutes
4 Minutes
4 Minutes
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R502-002,C
UTC RCT02
BLOCK DIAGRAM OF APPLICATION CIRCUIT (1)
CMOS IC
5~12V
1 2 3
RIGHTB TESTB GND
LEFTB OFF OSCI OSCO PC VDD SO
14 13 12 11 10 9 8 +
POW ER OFF
4 5 6 7
BACK FOR TURBOB SC
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
BLOCK DIAGRAM OF APPLICATION CIRCUIT (2)
CMOS IC
2.5~5.0V
1 2 3 4 5 6 7
RIGHTB TESTB GND BACK FOR TURBOB SC
LEFTB OFF OSCI OSCO PC VDD SO
14 13 12 11 10 9 8
POW ER OFF
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
BLOCK DIAGRAM OF APPLICATION CIRCUIT (3)
CMOS IC
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 12 11 10 9 8 +
POW ER OFF
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
BLOCK DIAGRAM OF APPLICATION CIRCUIT (4)
CMOS IC
2.5~5.0V
1 2 3 4 5 6 7
RIGHTB TESTB GND BACK FOR TURBOB SC
LEFTB OFF OSCI OSCO PC VDD SO
14 13 12 11 10 9 8 +
POW ER OFF
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 POW ER OFF S6 S5 R7200K C11 V7 4.7u 4148 + V4 4.7V R10 1K R4 6.8K C8 0.02u V1 9014 C3 47 C9 68 14 13 12 11 10 R2 4.7K V3 LED R9 330 V5 8550 R8 3.9K
R12 10M
V6 9013
B1 9V
LEFTB
VDD
OFF
OSCI
OSCO
SO
PC
L2 2.2u C4 150 C2 150 L3
A1 ANTENNA L4 6.8u C1 100
9
RIGHTB
TESTB
BACK
GND
FOR
TURBOB
RCT02
8
R3 220K SC CR1 27.145 V2 9014
L1 2.2u
C7 68
R5 3.3K
5
1
4
6
2
3
7
R1 100
C6 0.2 u
S1
S2
S3
S4
R6 100
UTC
UNISONIC TECHNOLOGIES CO., LTD.
10
QW-R502-002,C
UTC RCT02
CMOS IC
TYPICAL APPLICATION FOR TRANSIMIT CIRCUIT WITH 9V BATTERY
A1 ANITENNA
L4 6.8u
C1 100
C4 L3 150
L2 2.2u
V1 9014
C8 02u
C3 47
c9 68
R5 33K
L1 2.2u
C7 68 V2 9014
R9 330
V4 4.2V
R3 CR1 220K 27.145
R6 100 10 VDD PC 9 8 SO R4 6.8K
B1 9V
C12 C11 01U 3.3U
R7 200K
14
13
LEFTB
OSCI
OFF
12
OSCO
11
R1 100
C6 0.2u
TURBOB
RIGHTB
TESTB
GND
BACK
FOR
5
2
3
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.
1
4
6
7
SC
RCT02
11
QW-R502-002,C

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