Document
TX-2B/RX-2C
TOY CAR REMOTE CONTROLLER WITH FIVE FUNCTIONS
DESCRIPTION
The TX-2B/RX-2C is a pair of CMOS LSIs designed for remote controlled car applications. The TX-2B/RX-2C has five control keys for controlling the motions (i.e. forward, backward, rightward, leftward and the turbo function) of the remote controlled car.
FEATURES
TX-2B
DIP-14
RX-2C
TX-2BS RX-2CS
* Wide operating voltage range (VCC=1.8V~5.0V when DC-DC is not used and VCC=1.0V~5.0V when DC-DC is used)
* Low stand-by current * In order to be used in the low voltage condition, the DC-DC is
added in RX-2C; you can decide whether to use DC-DC; the voltage to turn on is 1.0V ; and the voltage to work is 0.8V ; and the output voltage is 3.0V ; * Auto-power-off function for TX-2B * Few external components are needed
DIP-16
SOP-16
ORDERING INFORMATION
Device TX-2B TX-2BS RX-2C RX-2CS
Package DIP-14-300-2.54 SOP-16-225-1.27 DIP-16-300-2.54 SOP-16-225-1.27
BLOCK DIAGRAM
OSCI 12 OSCO 11 RIGHT 1 LEFT 14 TURBO 6 FORWARD 5 BACKWARD 4
FOSC
13 Oscillator
Latch Circuit
TEST B
2
Timing Generator
9 VDD
Encoding Circuit
Logic
10 PC 8 SO 7 SC
3
GND
TRANSMITTER TX-2B Block Diagram
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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REV:1.1 2008.06.12 Page 1 of 13
TX-2B/RX-2C
BLOCK DIAGRAM (continued)
OSCI 4 OSCO 5
SI 3
VO1 15 VI1 14
LX 8
VO2 1 VI2 16
Oscillator AMP
Timing generator
Decoding circuit
DC-DC
Counter PLA
latch
2
GND
RECEIVER RX-2C Block Diagram
13 VDD
9 MOD
6 RIGHT 7 LEFT 12 TURBO 10 BACKWARD 11 FORWARD
ABSOLUTE MAXIMUM RATINGS
Characteristics Supply Voltage Input / Output Voltage Storage Temperature Operating Temperature
Symbol VDC VI/O Tstg TOPR
Value 0.3~6.0 GND-0.2~VDD+0.2 -10~60 -25~125
Unit V V °C °C
ELECTRICAL CHARACTERISTICS
1. TX-2B(VDD=4.5V, Fosc=128 KHz, Tamb=25°C, unless otherwise specified.)
Characteristics
Symbol
Test conditions
Min.
Operating Voltage
VDD
1.8
Low Voltage input
VIL
Function input pin
--
Stand-By Current
ISTB No input
--
Operating Current
IDD
Output without load
--
SO Driving Current
IDRSO Load=0.7V
20
SC Driving Current
IDRSC Load=0.7V
20
PC Driving Current
IDRPC Load=0.7V
15
Tolerance of frequency
Ftolerance RX-2C oscillator 128KHz
-20
Typ. 4.5 ----
Max. 5.0 2.3 3.0 0.4
+20
Unit V V μA mA mA mA mA %
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.1 2008.06.12 Page 2 of 13
TX-2B/RX-2C
2. RX-2C (VDD=4.0V, Fosc=128KHz, Tamb=25°C, DC-DC is not used, unless otherwise specified.)
Characteristics
Symbol
Test conditions
Min. Typ. Max. Unit
Operating Voltage
VDD
1.8
4.5
5.0
V
Operating Current
IDD
Output without load
--
--
1.0
mA
Driving Current
Idrive Load=0.7V
4.5
--
--
mA
Tolerance of frequency
Ftolerance TX-2B 128KHz
-20
+20
%
PIN CONFIGURATION
PIN DESCRIPTION
1. TX-2B/TX-2BS
Pin No.
TX-2B TX-2BS
1
1
2
2
3
3
4
4
5
5
6
6
7
7
--
8, 9
8
10
9
11
10
12
11
13
12
14
13
15
14
16
Symbol
Description
RIGHT TEST GND BACKWARD FORWARD TURBO
SC NC SO VDD PC OSCO OSCI FOSC LEFT
The rightward function will be selected, if this pin is connected to GND test pin 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 Not connect Output pin of the encoding signal without carrier frequency Positive power supply Power control output pin Oscillator output pin Oscillator input pin Oscillate frequency output The leftward function will be selected, if this pin is connected to GND
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.1 2008.06.12 Page 3 of 13
TX-2B/RX-2C
2. RX-2C Pin No. 1 2 3 4 5 6 7 8
9
10 11 12 13 14 15 16
Symbol VO2 GND SI OSCI OSCO
RIGHT LEFT
LX
MOD
BACKWARD FORWARD
TURBO VDD VI1 VO1 VI2
Description Inverter 2 output pin for power amplify Negative power supply Input pin of the encoding signal Oscillator input pin Oscillator output pin Rightward output pin Leftward output pin DC-DC output pin Output pin (pull up) to decide the format of output sign, RX-2C is same with RX2 if the pin is high, and if the pin is low, RX-2C output another sign format. Backward output pin Forward output pin TURBO output pin Positive power supply Inverter 1 input pin for power amplify Inverter 1 output pin for power amplify Inverter 2 input pin for power amplify
FUNCTION DESCRIPTION
CODE FORMAT
1. ENCODE RULE (A).Bit Forma (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
234
12
3 4 W1 W1 W1 W1
start code
1 word
n x W1 function code
W2 W2 W2 W2
W1
W1
n-th
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.1 2008.06.12 Page 4 of 13
TX-2B/RX-2C
Number Of Functio.