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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
REMOTE CONTROLLER WITH FIVE FUNCTIONS
General Description
The TX2/RX2 are a pair of CMOS LSIs designed for remote controlled car applications. TX2
Is the transmitter and RX2 is the receiver. They provide five function key to control forward, Backward,
Rightward, Leftward and Turbo motions. Beside,a combination of these five motions can be played.
RX2 Provide two high effective amplifiers and Enhance Signal Input recognition capacity to enhance remote
control distance.
Major Core Features:
Wide and low operating voltage range: 2.2V to 5.0V
Typical oscillator frequency:
RF:128KHz.
IR :114KHz(Carrier Frequency:57KHz).
IR : 76KHz(Carrier Frequency:38KHz).
Provide two transmissive interface(RF and IR)for different application.
RX2 Provide two high effective amplifiers to enhance remote control distance.
Enhance Signal Input recognition capacity for very weak signal.
Auto Power-OFF function for TX2
Low Standby current (TX2) and low operating current.(RX2).
Oscillator with an external resistor.
Peripheral Features:
5-function remote controller controlling forward/ backward/ turbo/ right/ left.
Few external components needed.
Application Field:
remote controlled toy.
remote electric appliance controller.
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Special Features Description:
TX2 auto Power OFF function:
When input key is pulled low, TX2 will wake up, SC and SO will continuously send out code
in RF format (Non-Carrier) and IR format(Carrier). However when a complete code is sent out
and the key is released,TX2 will automatically into powered off mode.
TX2 IR transmission interface:
Built-in counter to generate 38KHz or 57KHz carrier frequency for Infrared applications.
Pin Assignment and Block Diagram:
Block Diagram
Transmitter
Pin Assignment
TESTB
TX2C
OSCI
Timing
RIGHTB 1 LEFTB Oscillator
14 Generator
OSCO
TESTB 2 FOSC
13
12
GND 3 OSCI
RIGHTB
BACKWARDB 4 11 OSCO
TX2C
LEFTB PC
Latch Encoding Logic
TURBOB SO
FORWARDB 5 10 PC
Circuit Circuit
FORWARDB SC
6 9 VDD
BACKWARDB
TURBOB
8
SC 7 SO
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Receiver
Block Diagram
Pin Assignment
OSCI
RX2C
Timing
Oscillator
OSCO Generator
VO2 1 VI2
16
Decoding
VO1
GND 2 15 SI AMP Counter
Circuit
SI 3 VI1
14
OSCI 4 13
VDD
RX2C12 TURBO VI1
VO1 PLA
RIGHT 5
OSCO
6 11 FORWARD
VI2 VO2 RIGHT
LEFT 7 10 BACKWARD
LEFT
LDB
RDB Latch TURBO
89
LDB
Control
BACKWARD
Logic
RDB
FORWARD
Absolute Maximum Ratings Comments*
Never allow a stress to exceed the values listed under
DC Supply Voltage.....................................0.3V to 5.0V
"Absolute Maximun Ratings", otherwise the device would
Input/Output Voltage...........GND -0.2V to VDD + 0.2V
suffer from a permanent damage. Nor is a stress at the listed
� �
Operating temperature..............................-10 C to 60 C
value be allowed to persist over a period, since an extended
� �
Storage Temperature..............................-25 C to 125 C
exposure to the absolute maximum rating condition may
also affect the reliability of the device, if not causing a
damage thereof.
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Electrical Characteristics
TX2
�
(VDD=4.5V, Fosc = 128KHz, TA=25 C, unless otherwise specified.)
Parameter Symbol Min. Typ. Max.
Operating Voltage VDD 2.2V 4.5V 5.0V
Idd
Operating Current - - 1mA
Istb
Stand-by Current - - 1�A
Idrive
DC O/P Driving Current 3mA - -
Idrive
AC O/P Driving Current 3mA - -
Faudio
AC O/P Frequency 500Hz - 1KHz
RX2
�
(VDD=4.5V, Fosc = 128KHz, TA=25 C, unless otherwise specified.)
Parameter Symbol Min. Typ. Max.
Operating Voltage VDD 2.2V 4.5V 5.0V
Idd
Operating Current - - 0.7mA
Idrive
O/P Driving Current 0.6mA - -
Isink
O/P Sinking Current 0.6mA - -
Effect Decoding
Ftolerance
-20% - 20%
Frequency Variation
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Pin Description
TX2
Pin No. Designation Description
1 RIGHTB The rightward function will be selected when this pin is connected to GND.
2 TESTB This pin is used for testing purpose only.
3 GND Negative power supply
4 BACKWARDB The backward function will be selected when this pin is connected to GND.
5 FORWARDB The forward function will be selected when this pin is connected to GND.
6 TURBOB The turbo function will be selected when 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 purpose.
14 LEFTB The leftward function will be selected when this pin is connected to GND.
RX2
Pin No. Designation 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 RDB Rightward function is disabled when this pin is connected to GND.
9 LDB Leftward function is disabled when this pin is connected to GND.
10 BACKWARD Backward output pin
11 FORWARD Forward output pin
12 TURBO Turbo output pin
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
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
Bit Format
1KHz
W1
1KHz 50% Duty cycle
W2
500Hz 75% Duty cycle
Data Format
W2 W2 W2 W2 (n) x W1 W2 W2 W2 W2 (n) x W1 W2 W2 W2 W2
Number of Function Codes (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
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
52 Backward & Left Backward & Left
58 Left Left
64 Right Right
W2
W2 W2 W2 W2 W2 W2 W2
W1
W1 W1 W1 W1
W1
1 2 3 4
1 2 3 4 n-th
start code
function code
1 word
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Encode/Decode Timing
(A)
Any function key
1st word 2nd word 3rd word 1 2 3 4 5 6 7 8
Encode output
end code
Decode output
9ms
9ms
(B)
SI
8 msec (n) W1 8 msec 1 ms
Decode output
T
T= 17 ms + (nW1) x 1 ms
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Typical Application Circuit
Transmitter (TX2 Fosc H"128 KHz)
B500K &!
VCC
SI R.F.
13 11 10 9
14 12 8
Circuit
LEFTB FOSC OSCI OSCO SO
PC VDD
GND
TX2C
RIGHTB TESTB BACKWARDB FORWARDB TURBOB
GND SC
1
2 3 4 5 6
7
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Receiver (RX2 Fosc H"128 KHz)
power switch
13 10
16 15 14 12 11 9
+
VDD BACKWARD LDB
VI2 VO1 VI1 TURBO FORWARD
100 �F -
4.3V
RX2C
VO2 GND OSCI OSCO RIGHT LEFT RDB
SI
VCC
1
2 3 4 5 6
7 8
R.F.
Circuit
GND
B500K&!
Infrared Application Circuit
Transmitter(TX2 Fosc H" 114 KHz)
+
100
�
DC:3V 1-4.7 &!
-
f=114KHz
Photo Diode
13 11 10 9
14 12 8
LEFTB FOSC OSCI OSCO SO
PC VDD
TX2C
RIGHTB TESTB BACKWARDB FORWARDB TURBOB
GND SC
1
2 3 4 5 6
7
8050
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Recevier(RX2 Fosc H"114KHz)
100K
VDD
13 10
16 15 14 12 11 9
+
OUT 57KHz
100 F
� VI2 VO1 VI1 VDD BACKWARD LDB
TURBO FORWARD
-
DC: 5V IR Receiver
1815
GND
RX2C
VO2 GND OSCI OSCO RIGHT
SI LEFT RDB
1 2 3 4 5 6
7 8
f=114KHz
Testing Circuit
Fosc for TX2 E" Fosc, RX2 E" 128 �z
FORWARD
TURBO BACKWARD
14 13 12 11 10 16 15 14 13 12 11 10
9 8 9
+
100 -
�
TX2C
RX2C
2 3 4 5 6 2 3 4 5 6
1 7 1 7 8
LEFTB RIGHTB BACKWARDB TURBOB
RIGHT LEFT
FORWARDB
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TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
Bonding Diagram
TX2
Designation X Y
SC
SO TURBOB 672.0 95.67
RIGHTB
815.63 95.60
TESTB
1002.25 95.63
GND
1019.00 232.76
BACKWARDB
1020.66 434.44
FORWARDB
1018.56 1016.77
TURBOB
693.17 1018.87
SC
255.33 1019.75
SO
95.80 783.16
VDD
95.72 650.66
PC
VDD
95.56 518.42
OSCO
93.75 287.04
OSCI
TX2C
about 96.10 146.74
FOSC
1.24 mm 534.99 93.39
LEFTB
PC
FORWARDB
OSCO
Unit:in um
X: 1240 Y: 1240
BACKWARDB
Note: Substrate is connected to VDD
OSCI
RIGHTB
LEFTB TESTB GND
FOSC
about 1.24 mm
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EC HIGHLAND (SHENZHEN) ELECTRONICS CO., LTD
TX2/RX2
TX2/RX2
TX2/RX2
TX2/RX2
RX2
Designation X Y
VO1 VI1 NC VDD TURBO
VO2
91.82 677.22
FORWARD
GND
94.41 537.61
NC
91.93 405.44
SI
VI2 92.57 98.97
OSCI
269.48 101.80
OSCO
BACKWARD 635.35 99.04
NC
RIGHT
1029.73 99.12
LEFT
1397.16 139.50
RDB
1396.68 289.45
LDB
1397.10 539.08
RX2C
BACKWARD
about
1396.72 801.79
VO2 LDB
FORWARD
1.38 mm
1396.73 1035.18
TURBO
1135.79 1165.97
NC
GND
VDD
627.98 1165.40
VI1
235.61 1166.05
VO1
92.23 1166.02
NC RDB
VI2
92.02 933.79
OSCI OSCO NC RIGHT
SI Unit: in um
LEFT
X: 1620 Y: 1380
Note: Substrate is connected to VDD
about 1.62 mm
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