1. Silan
Semiconductors TX-2B/RX-2B
REMOTE CONTROLLER WITH FIVE
FUNCTIONS
DESCRIPTION
The TX-2B/RX-2B is a pair of CMOS LSIs designed for remote DIP-14
controlled car applications. The TX-2B/RX-2B has five control keys TX-2B
for controlling the motions (i.e. forward, backward, rightward, leftward
and the turbo function ) of the remote controlled car.
FEATURES
* Wide operating voltage range (VCC=1.5~5.0V) RX-2B
DIP-16
* Low stand-by current
* Auto-power-off function for TX-2B
* Few external components are needed
ORDERING INFORMATION
Part No. Package
TX-2B DIP-14-300-2.54
RX-2B DIP-16-300-2.54
BLOCK DIAGRAM
FOSC TEST B
13 2
OSCI 12
Oscillator Timing
Generator
OSCO 11
9 VDD
RIGHT 1
LEFT 14
10 PC
Latch Encoding
TURBO 6 Logic 8 SO
Circuit Circuit
7 SC
FORWARD 5
BACKWARD 4
3
GND
TRANSMITTER TX-2B Block Diagram
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
1

2. Silan
Semiconductors TX-2B/RX-2B
BLOCK DIAGRAM
OSCI 4
Timing
Oscillator Generator 13 VDD
OSCO 5
Decoding Computer
SI 3 AMP Circuit
VO1 15
PLA
VI1 14
LDB 9
Control 6 RIGHT
Logic
RDB 8 7 LEFT
Latch 12 TURBO
Circuit
VI2 16 10 BACKWARD
VO2 1 11 FORWARD
2
GND
RECEIVER RX-2B Block Diagram
PIN CONFIGURATION
RIGHT 1 14 LEFT VO2 1 16 VI2
TEST 2 13 GND 2 15
FOSC VO1
GND 3 12 SI 3 14 VI1
OSCI
TX-2B
RX-2B
ACKWARD 4 11 OSCO OSCI 4 13 VDD
FORWARD 5 10 OSCO 5 12 TURBO
PC
TURBO 6 9 RIGHT 6 11 FORWARD
VDD
SC 7 8 SO LEFT 7 10 BACKWARD
ROB 8 9 LDB
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
2

3. Silan
Semiconductors TX-2B/RX-2B
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Value Unit
Supply Voltage VDD 0.3~5.0 V
Input / Output Voltage VIN, VOUT GND-0.3~VDD+0.3 V
Operating Temperature TOPR -10~65 °C
Storage Temperature Tstg -25~125 °C
ELECTRICAL CHARACTERISTICS
1. TX-2B (VDD=4.0V, Fosc=128KHz, Tamb =25°C, unless otherwise specified.)
Characteristic Symbol Min Typ Max Unit
Operating Voltage VDD 1.5 4.0 5.0 V
Operating Current IDD -- -- 2.0 mA
Stand-By Current ISTB -- -- 10 µA
DC O/P Driving Current Idrive 5 -- -- mA
AC O/P Driving Current Idrive 5 -- -- mA
AC O/P Frequency Faudio 0.5 -- 1.0 kHz
2. RX-2B (VDD=4.0V,Fosc=128KHz, Tamb=25°C, unless otherwise specified.)
characteristic Symbol Min Typ Max Unit
Operating Voltage VDD 1.5 4.0 5.0 V
Operating Current IDD -- -- 3.0 mA
O/P Driving Current Idrive 1 -- -- mA
O/P Sinking Current Isink 1 -- -- mA
Effect Decoding Frequency Variation Ftolerance -20 -- 20 %
PIN DESCRIPTION
1. TX-2B
Pin No. Symbol Description
1 RIGHT The rightward function will be selected, if this pin is connected to GND
2 TEST This pin is used for testing mode
3 GND Negative power supply
4 BACKWARD The backward function will be selected, if this pin is connected to GND
5 FORWARD The forward function will be selected, if this pin is connected to GND
(To be continued)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
3

4. Silan
Semiconductors TX-2B/RX-2B
(Continued)
Pin No. Symbol Description
6 TURBO The turbo function will be selected 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 VDD Positive power supply
10 PC Power control output pin
11 OSCO Oscillator output pin
12 OSCI Oscillator input pin
13 FOSC This pin is used for testing mode
14 LEFT The leftward function will be selected, if this pin is connected to GND
2. RX-2B
Pin No. Symbol Description
1 VO2 Inverter 2 output pin for power amplify
2 GND Negative power supply
3 SI Input pin of the encoding signal
4 OSCI Oscillator input pin
5 OSCO Oscillator output pin
6 RIGHT Rightward output pin
7 LEFT Leftward output pin
8 ROB Rightward function disable, if this pin is connected to GND
9 LDB Leftward function disable, if this pin is connected to GND
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
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
4

5. Silan
Semiconductors TX-2B/RX-2B
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
W2 W2 W2 W2 1 2 3 4 W2 W2 W2 W2
1 2 3 4 W1 W1 W1 W1
W1 W1
n-th
start code
n x W1
function code
1 word
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
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
5

6. Silan
Semiconductors TX-2B/RX-2B
2. ENCODE/DECODE TIMING
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
SI
8ms (n) W1 8ms 1ms
Decode output
T
T=17ms+(nW1)x1ms
TESTING CIRCUIT
(The oscillator frequency of TX-2B, RX-2B is 128KHz, the oscillator resistor is 160KΩ and 250KΩ respectively)
forward
backward
fosc=128kHz
turbo
VCC=3V
14 13 12 11 10 9 8 16 15 14 13 12 11 10 9
F
­ TX-2B RX-2B
100
1 2 3 4 5 6 7 1 2 3 4 5 6 7 8
backward
forward
turbo
right
right
left
left
fosc=128kHz
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
6

7. Silan
Semiconductors TX-2B/RX-2B
TYPICAL APPLICATION CIRCUIT
TRANSMITTER
VCC
Rosc=500k ¡
R.F.
SI CIRCUIT
14 13 12 11 10 9 8
TX-2B
1 2 3 4 5 6 7
backward
forward
turbo
right
left
RECEIVER
power
switch
16 15 14 13 12 11 10 9
100
­ F
4.3V RX-2B
VCC
1 2 3 4 5 6 7 8
R.F.
CIRCUIT
500k ¡
GND
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
7

8. Silan
Semiconductors TX-2B/RX-2B
INFRARED APPLICATION CIRCUIT
TRANSMITTER
DC:3V
F
­
100
fosc=114kHz
¡
1~4.7
14 13 12 11 10 9 8
Photo Diode
TX-2B
1 2 3 4 5 6 7
Frontwar
Backw
Turbo
C8050
Right
ard
Left
d
RECEIVER
16 15 14 13 12 11 10 9
DC:5V 100K ¡
RX-2B
F
VDD
­
100
OUT IR
1 2 3 4 5 6 7 8 Receiver
1815
fosc=114KHz
GND
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
8

9. Silan
Semiconductors TX-2B/RX-2B
RECOMMENDED APPLICATION CIRCUIT
R L VDD=9V
1 14
LED
2 13
1.5k ¡
3 12
Rosc=160K
¡ ¡
203P
220k
390 L1 L2
L4
B XTAL 2.2 H
­ 2.2 H­ 6.8 H­
4 TX-2B 11 27MHz 47P
151P L3
F 7T 0.3mm ( ) ¶
5 10 x 5mm(Core)
68P
Q1
TURBO C945 Q2
C945
6 9 ¡
151P
103P
¡ ¡
68P
F
100
203P
203P
3.0V
33K
100
­
47
7 8
C2 47P
Q1: C9018,C1815,C380,C382
4P
Q2,Q3,Q4: 5610,C8550,B772
Q5,Q6: C8050,5609,D882
1.1 F
7T 0.3mm ( ) ¶
C3 18P
­ VDD1=12V,R=330 ¡ Q7,Q8: B564,C8550,B772
L1
Q1 x 5mm(Core)
L2
VDD1=9V,R=220 ¡ Q9,Q10: D471,C8050,D882 VDD1
180k ¡ 3.3k ¡ 3.0V 1N4148
C1 102P
C4 203P
F
104P
¡ ¡
R2
­ 100 F­
820
220 F ­ 470 F
­
104P 3.3k
4.7
Q3 /16V
/16V /16V
VDD2
3.9MO
103P 1k
¡ R1
203P 330 ¡ C945 Q2 Q4 R2
1 16
¡ 1k ¡
M
3.3k
390 ¡ C945 C945
2 15
¡ Q5 Q6
501P
473P
3.9M
222P
3 14
1kO
4 13
Rosc=250K
R1,R2,R3,R4=80~150 ,are ¡
RX-2B changeable with the VDD1 and
VDD2.
turbo
5 12
right forward
6 11
left backward
7 10
R3
8 9
Q7 Q8 R4
1k ¡ 1k¡
C945 M C945
Q9 Q10
473P
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
9

10. Silan
Semiconductors TX-2B/RX-2B
PACKAGE OUTLINE
DIP-14-300-2.54 UNIT: mm
2.54
0.05
B
0.25
0.25
7.62
B
6.35
1.52
19.55 B0.3 15 degree
4.36MAX
0.5MIN
3.00MIN
0.46B 0.08 2.40MAX
DIP-16-300-2.54 UNIT: mm
2.54
0.05
0.25
B
0.25
7.62
B
6.35
19.55 0.3B 1.52 15 degree
4.36MAX
0.5MIN
3.00MIN
1.27MAX
0.99
B 0.3 0.46 B 0.08
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2002.03.29
10