TX-5B/RX-5B
RX-5B
Pin No.
1
2
3
4
5
6,8,17,15
7
9
10
11
12
13
14
16
18
19
20
21
22
Symbol
VO2
GND
SI
OSCI
OSCO
F1, F2,F3,F4
RIGHT
LEFT
VT
RDB
LDB
LRTD
BACKWARD
FORWARD
TURBO
V
DD
VI1
VO1
VI2
Negative power supply
Input pin of the encoding signal
Oscillator input pin
Oscillator output pin
F1,F2,F3,F4 function output pin
Rightward output pin
Leftward output pin
Auto Shut-OFF input pin.
If VT voltage exceeds 1.4V, all outputs shut off automatically.
Right disable pin.
Left disable pin.
Left/right turbo disable pin
Backward output pin
Forward output pin
TURBO output pin
Positive power supply
Inverter 1 input pin for signal amplify
Inverter 1 output pin for signal amplify
Inverter 2 input pin for signal amplify
Description
Inverter 2 output pin for signal amplify
FUNCTION DESCRIPTION
The TX-5B/RX-5B are a pair of CMOS LSIs designed for remote controlled car applications. The TX-5B/RX-5B
have nine control keys controlling the motions (i.e. forward, backward, rightward, leftward, and trigger1--trigger4
functions and the turbo function) of the remote controlled car.
1. OVER-CURRENT PROTECTION
An Auto Shut-Off mechanism is built-in according to Toy Safety Requirement and effective during over-current
situation in motor driver. The active high input applying to this Auto Shut-Off pin will turn off the motor. (VT pin,
when unused, has to be connected to ground. The transfer point=1.4V)
2. DATA FORMAT
F1="1"
500Hz, 3/4 duty
F0="0"
500Hz, 1/4 duty
3. CODING METHOD
3.1 When a trigger pin is triggered, its data code will correspond to the data format of "F1", while the remaining
pins will have the data format of "F0".
3.2. Data string: start code + data code +parity code + end code
Start code = F1 F1 F1 F1 F0
Data code =
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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www.silan.com.cn
REV:2.1
2004.08.03
Page 4 of 10
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