TOY CAR REMOTE CONTROLLER WITH FIVE FUNCTIONS
DIP-16-300-2.54
DIP-14-300-2.54SOP-16-225-1.27
DESCRIPTION
The TX-2B/RX-2B is a pair of CMOS LSIs designed for remote controlled car applications. The TX-2B/RX-2B has five control keys for controlling the motions (i.e. forward, backward,rightward, leftward and the turbo function) of the remote controlled car.
FEATURES
* Wide operating voltage range (V CC =1.5~5.0V)* Low stand-by current
* Auto-power-off function for TX-2B * Few external components are needed
ORDERING INFORMATION
Device Package TX-2B DIP-14-300-2.54RX-2B
DIP-16-300-2.54TX-2BS/RX-2BS
SOP-16-225-1.27
BLOCK DIAGRAM
OSCI
OSCO
RIGHT LEFT
TURBO
FORWARD BACKWARD
PC
SO SC
V DD
TRANSMITTER TX-2B Block Diagram
BLOCK DIAGRAM (continued)
LDB
RDB SI
OSCO
GND
RIGHT LEFT
TURBO BACKWARD FORWARD
V DD
RECEIVER RX-2B Block Diagram
ABSOLUTE MAXIMUM RATINGS
Characteristics
Symbol Value Unit Supply Voltage V DD 0.3~5.0V Input / Output Voltage V IN , V OUT GND-0.3~V DD +0.3
V Operating Temperature T OPR -10~65°C Storage Temperature
T stg
-25~125
°C
ELECTRICAL CHARACTERISTICS
1. TX-2B (V DD =4.0V, F osc =128KHz, T amb =25°C, unless otherwise specified.)
Characteristics
Symbol Min.Typ.Max.Unit Operating Voltage V DD 1.5 4.0 5.0V Operating Current I DD ---- 2.0mA Stand-By Current I STB ----10µA DC O/P Driving Current I drive 5----mA AC O/P Driving Current I drive 5----mA AC O/P Frequency
F audio
0.5
-- 1.0
kHz
2. RX-2B (V DD =4.0V, F osc =128KHz, T amb =25°C, unless otherwise specified.)
Characteristics
Symbol Min.Typ.Max.Unit Operating Voltage V DD 1.5 4.0 5.0V Operating Current I DD ---- 3.0
mA O/P Driving Current I drive 1----mA O/P Sinking Current
I sink 1----
mA Effect Decoding Frequency Variation
F tolerance
-20
--20
%
PIN CONFIGURATION
RIGHT TEST GND
BACKWARD FORWARD
TURBO
SC
PC LEFT FOSC OSCI OSCO V DD SO
RIGHT GND BACKWARD FORWARD TURBO LEFT OSCI OSCO V DD VO2SI ROB
LDB
VI1VO1VI2TURBO
TEST SO PC OSCO SC BACNWARD FORWARD
OSCI
RIGHT
GND
NC
NC
FOSC LEFT V DD PIN DESCRIPTION
1. TX-2B
Pin No.TX-2B TX-2BS
Symbol Description
11RIGHT The rightward function will be selected, if this pin is connected to GND 22TEST This pin is used for testing mode 33GND Negative power supply
44BACKWARD The backward function will be selected, if this pin is connected to GND 55FORWARD The forward function will be selected, if this pin is connected to GND 66TURBO The turbo function will be selected if this pin is connected to GND 77SC Output pin of the encoding signal with carrier frequency 810SO Output pin of the encoding signal without carrier frequency 911V DD Positive power supply 1012PC Power control output pin 1113OSCO Oscillator output pin 1214OSCI Oscillator input pin
1315FOSC This pin is used for testing mode
14
16LEFT The leftward function will be selected, if this pin is connected to GND 8, 9
NC
Not connect
2. RX-2B Pin No.Symbol
Description
1VO2Inverter 2 output pin for power amplify
2GND Negative power supply 3SI Input pin of the encoding signal 4OSCI Oscillator input pin 5OSCO Oscillator output pin 6RIGHT Rightward output pin 7LEFT Leftward output pin
8ROB Rightward function disable, if this pin is connected to GND 9LDB Leftward function disable, if this pin is connected to GND 10BACKWARD Backward output pin 11FORWARD Forward output pin 12TURBO
TURBO output pin 13V DD Positive power supply
14VI1Inverter 1 input pin for power amplify 15VO1Inverter 1 output pin for power amplify 16
VI2
Inverter 2 input pin for power amplify
FUNCTION DESCRIPTION
Code format 1. ENCODE RULE
(A).Bit Format (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
W2(n) X W1
W2
W2
W2
W2
(n) X W1
W2
W2
W2
W2
W2W2W2W21
2
3
4
12
34
W1
W1
W1
W1
W1W1
W2W2W2
W2
Number Of Function Code (N) W1
Function Key
Decode Result 4End Code 10Forward
Forward
16Forward & Turbo
Forward 22Turbo
Turbo 28Turbo & Forward & Left
Forward & Left 34Turbo & Forward & Right
Forward & Right
40Backward Backward 46Backward & Right Backward & Right 52Backward & Left
Backward & Left
58Left Left 64
Right Right
2. ENCODE/DECODE TIMING
Any function key Encode output
Decode output
1st word 2nd word 3rd word 12345678
9ms
9ms end code
T
(n) W1
8ms
1ms
SI
Decode output
T=17ms+(nW1)x1ms
8ms
TESTING CIRCUIT
(The oscillator frequency of TX-2B, RX-2B is 128KHz, the oscillator resistor is 160KΩ and 250KΩ respectively)
forward
TRANSMITTER
RECEIVER
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