Data Sheet
PT8A9701/9731
Duty Cycle Output Remote Controller
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Features
• The PT8A9701 works as the encoder and the
PT8A9731 works as the decoder
• Five output pins, 4 for forward, backward, left,
right functions, and 1 functional keys
• Operation power supply for PT8A9701: 3V to 12V
(with series resistor)
• Auto power-off if no key pressed (PT8A9701)
• Low operating current
• 3-speed forward and backward output
• On-chip oscillator with an external resistor
• On-chip reversing amplifiers
• Built-in 3.0V Zener (Vz) (PT8A9731)
• Few external components needed
General Description
The PT8A9701 and PT8A9731 is a pair of CMOS
LSIs designed for remote controlled toy car
application. They have five control keys for
controlling the corresponding motion (forward,
backward, left, right, and 1 functional keys) of the
remote controlled car.
Ordering Information
Part No.
PT8A9701P
PT8A9701DE
PT8A9731P
PT8A9731W
PT8A9731DE
Package
16-pin PDIP
Die Form
14-pin PDIP
14-pin SOIC
Die Form
Block Diagram
Figure 1. Block Diagram of PT8A9701
f
0
/2
OSCI
OSCO
f
0
Oscillator
Timing
Generator
SC
MUX
SO
Forward
Backward
Left
Right
Turbo
F1
F2
F3/F4
Latch
Circuit
Logic
Control
PC
V
CC
Counters
PT0094(09/03)
1
Ver:2
Data Sheet
PT8A9701/9731
Duty Cycle Output Remote Controller
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Figure 2. Block Diagram of PT8A9731
OSCI
OSCO
SI
Oscillator
Timing
Generator
Decoding
Circuit
Counter
V
CC
Amp
PLA
VI1
VO1
VI2
VO2
Control
Logic
Latch
Circuit
Right
Left
Backward
Forward
F1
Pin Configuration
PT8A9701P
16-Pin PDIP
Right
NC
GND
Backward
Forward
Turbo
SC
F3/F4
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Left
F1
OSCI
OSCO
PC
V
CC
SO
F2
PT8A9731P/W
14-Pin PDIP
14-Pin SOIC
VO2
GND
SI
OSCI
OSCO
Right
Left
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VI2
VO1
VI1
V
CC
F1
Forward
Backward
Top View
PT0094(09/03)
2
Ver:2
Data Sheet
PT8A9701/9731
Duty Cycle Output Remote Controller
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Pad Location
Pad Location of PT8A9701DE
GND
NC
RIGHT
LEFT
FI
OSCI
BACKWARD
FORWARD
OSCO
1515um
TURBO
PC
SC
Die No.
F3/F4
F2
SO
V
CC
1360um
Pad Name
X Coordinate
RIGHT
457.5
NC
317.5
GND
115.5
BACKWARD
98
FORWARD
98
TURBO
98
SC
108.5
F3/F4
171.5
Note: Substrate is connected to Vcc
Pad Coordinates
Y Coordinate
Pad Name
1300.5
F2
1300.5
SO
1202
Vcc
1053
PC
903
OSCO
763
OSCI
460
F1
145.5
LEFT
X Coordinate
363.5
627
972
1152
1146
961.5
812.5
658
Y Coordinate
97.5
108
98
339.5
728.5
1300.5
1300.5
1300.5
PT0094(09/03)
3
Ver:2
Data Sheet
PT8A9701/9731
Duty Cycle Output Remote Controller
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Pad Location of PT8A9731DE
SI
GND
VO2
VI2
VO1
Vcc
VI1
OSCI
F1
1770um
FORWARD
OSCO
RIGHT
LEFT
BACKWARD
1660um
Pad Name
X Coordinate
VO2
874.6
GND
706.6
SI
456.3
OSCI
122.5
OSCO
122.5
RIGHT
430
LEFT
866.5
Note: Substrate is connected to V
CC
Pad Coordinates
Y Coordinate
Pad Name
1592
BACKWARD
1592
FORWARD
1604.1
F1
958.5
Vcc
394.5
VI1
125
VO1
125
VI2
X Coordinate
1213.5
1535
1535
1535
1433.4
1289.2
1018.8
Y Coordinate
125
614
961
1337.7
1592
1592
1592
PT0094(09/03)
4
Ver:2
Data Sheet
PT8A9701/9731
Duty Cycle Output Remote Controller
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Pin Description
Table 1. Pin/Pad Description of PT8A9701
P in No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P in /Pa d Na me
Right
NC
GND
Backward
Forward
Turbo
SC
F3/F4
F2
SO
V
CC
PC
OSCO
OSCI
F1
Left
Typ e
I
-
GND
I
I
I
O
I
I
O
P
O
O
I
I
I
Descr ip t ion
Rightward function selected if this pin connected to GND
No connection
Ground
Backward function selected if this pin connected to GND
Forward function selected if this pin connected to GND
Turbo function selected if this pin connected to GND
Output pin of the encoding signal with carrier freqency
Able to toggle between Function 3 and Function 4 if connected to GND
Function 2 selected if connected to GND
Output pin of the encoding signal without carrier freqency
Power supply
Power control output pin
Oscillator output pin
Oscillator input pin
Function 1 selected if connected to GND
Leftward function selected if this pin connected to GND
Table 2. Pin/Pad Description of PT8A9731
P in No
1, 13
2
3
4
5
6
7
8
9
10
11
12, 14
P in /Pa d Na me
VO2, VO1
GND
SI
OSCI
OSCO
Right
Left
Backward
Forward
F1
V
CC
VI1,VI2
Typ e
O
GND
I
I
O
O
O
O
O
O
P
I
Output pins of amplifiers 1 and 2
Ground
Input pin for encoded signal
Oscillator input pin
Oscillator output pin
Rightward output pin
Leftward output pin
Backward output pin
Forward output pin
F1 function output pin
Power supply
Input pins of amplifiers 1 and 2
Descr ip t ion
PT0094(09/03)
5
Ver:2
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