PT8A990A/991A
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9-Function Remote Controller
Features
The PT8A990A works as the encoder and the
PT8A991AP works as the decoder
9 output pins, 5 for forward, backward, left, right and
turbo functions, and 4 functional keys
Operation power supply: 3.0V to 5.5V
Auto power-off if no key pressed (PT8A990A)
Low operating current
On-chip oscillator with an external resistor
On-chip receiving amplifiers
Few external components needed
PT8A990AP
Configuration
PDIP
18-Pin
Description
The PT8A992A/993A is a pair of CMOS LSIs
designed for remote controlled toy car application. They
have 9 control keys for controlling the corresponding
motion (i.e. forward, backward, left, right turbo and 4
other functional keys) of the remote controlled car.
They
also
have
Forward(Backward)
and
turbo
combination application
PT8A991AP
22-Pin PDIP
Pin
Right
NC
GND
Backward
Forward
Turbo
SC
NC
F4
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
Left
F1
OSCI
OSCO
PC
V
CC
SO
F2
F3
VO2
GND
SI
OSCI
OSCO
F1
Right
F2
Left
PC
ON/OFF
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
VI2
VO1
VI1
V
CC
Turbo
Forward
Backward
LRTD
VT
F4
F3
PT8A990A 18-Pin DIP (Top View)
PT8A991A 22-Pin DIP(Top View)
Pin Description
Pin description for PT8A990A
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
12-07-0006
Pin Name
Right
NC
GND
Backward
Forward
Turbo
SC
NC
F4
F3
F2
SO
Vcc
PC
OSCO
OSCI
F1
Left
Type
I
-
GND
I
I
I
O
I
I
I
I
O
P
O
O
I
I
I
Top View
Description
The 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 frequency
No connection
Function 4 selected if connected to GND
Function 3 selected if connected to GND
Function 2 selected if connected to GND
Output pin of the encoding signal without carrier frequency
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
PT0095-1
1
07/06/2012
PT8A990A/991A
9-Function Remote Controller
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Pin description for PT8A993A
Pin No
1, 21
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20, 22
Pin Name
VO1, VO2
GND
SI
OSCI
OSCO
F1
Right
F2
Left
PC
ON/OFF
F3
F4
VT
LRTD
Backward
Forward
Turbo
Vcc
VI1, VI2
Type
O
GND
I
I
O
O
O
O
O
O
I
O
O
I
I
O
O
O
P
I
Description
Output pins of inverter 1 and 2 for Signal amplifier
Ground
Input pin for encoded signal
Oscillator input pin
Oscillator output pin
F1 function output pin
Rightward output pin
F2 function output pin
Leftward output pin
Power control pin
ON/OFF pin
F3 function output pin
F4 function output pin
Auto shut off input pin: if the voltage on this pin keeps higher than 0.095Vccfor 3 seconds, all
outputs will be shut off automatically.
Left/Right turbo disable pin
Backward output pin
Forward output pin
Turbo output pin
Power supply
Input pins of invertors 1 and 2 for signal amplifier
Block Diagram
Block diagram for PT8A990A
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
Counters
12-07-0006
2
PT0095-1
07/06/2012
PT8A992A/993A
10-Function Remote Controller
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Maximum Ratings
Storage Temperature..........................................................................................-25
o
C to +85
o
C
Ambient Temperature with Power Applied .....................................................0
o
C to +70
o
C
Supply Voltage to Ground Potential (Inputs & V
cc
Only) .............................-0.5 to +5.5V
Supply Voltage to Ground Potential (Outputs & D/O Only).......................-0.5 to +5.5V
DC Input Voltage...................................................................................................-0.5 to +5.5V
DC Output Current ............................................................................................................20mA
Power Dissipation ..........................................................................................................500mW
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended Operation Conditions
Sym
Vcc
V
IH
V
IL
F
OSC
T
A
Description
Supply Voltage
Input HIGH Voltage
Input LOW Voltage
Oscillator frequency
Operation temperature
Min
3
0.7Vcc
-
109
0
Typ
4
4
0
128
-
Max
5
-
0.3Vcc
146
70
Unit
V
V
V
kHz
C
DC Electrical Characteristics
PT8A990A (Unless otherwise noted, V
CC
= 4.0V, T
A
= 0 ~ 70º
C)
Sym
I
STB
I
CC
I
OH
Stand by current
Supply Current
Output HIGH Current
- PC and SO Pins
V
OH
=3.5V, T
A
= 25º
C
Output HIGH Current - SC Pin
Output HIGH Current - OSCO Pin
Output LOW Current - PC and SO Pins
I
OL
Output LOW Current - SC Pins
Output LOW Current - OSCO Pin
Input HIGH Current - Forward, Backward, Left, Right, F1, F2,
F3, F4, Turbo, NC, OSCI Pins
Input HIGH Current - Forward, Backward, Left, Right, F1, F2,
F3, F4, Turbo, NC Pins
Input LOW Current - OSCI Pin
V
OL
=0.5V, T
A
= 25º
C
V
CC
=5.5V, V
IH
=V
CC
,
T
A
= 25º
C
V
CC
=5.5V, V
IL
=0V,
T
A
= 25º
C
Description
Test conditions
T
A
= 70º Off state
C,
Output Unload
Min
-
-
-1
-3
-400
1
1.5
400
-
-10
-
Typ
-
-
-2
-4
-
4
5
-
-
-25
-1
Max
2
300
-
-
-
-
-
-
10
-100
-10
Unit
A
A
mA
mA
A
mA
mA
A
A
A
A
I
IH
I
IL
12-07-0006
3
PT0095-1
07/06/2012
PT8A992A/993A
10-Function Remote Controller
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PT8A991A (Unless otherwise noted, V
CC
= 4.0V, T
A
= 0 ~ 70º
C)
Sym
I
STB
I
CC
Stand by current
Supply Current
Output HIGH Current - VO1, VO2 and OSCO Pins
I
OH
Output HIGH Current - Forward, Backward, Left and Right Pins
Output HIGH Current – Turbo, F1, F2, F3, F4 Pins
Output HIGH Current - PC Pin
Output LOW Current - VO1, VO2 and OSCO Pins
I
OL
Output LOW Current - Forward, Backward, Left and Right Pins
Output LOW Current – Turbo, F1, F2, F3, F4 Pins
Output LOW Current - PC Pin
I
IH
I
IL
VT
Input HIGH Current - VT Pins
Input HIGH Current - SI, VI1, VI2, LRTD, ON/OFF and OSCI Pins
Input LOW Current - SI, VI1, VI2, VT and OSCI Pins
Input LOW Current - ON/OFF and LRTD Pin
Over Current Limit VT Pins
V
I
=V
CC
, T
A
= 25º
C
V
I
=0V, T
A
= 25º
C
Forward is high
V
OL
=0.5V, T
A
= 25º
C
V
OH
=3.5V, T
A
= 25º
C
Description
Test conditions
T
A
= 70º Off state
C,
Output Unload
Min
-
-
-300
-2
-2
-2
150
1
1
2
20
-
-
-20
0.35
Typ
-
-
-
-5
-5
-3
-
3
3
-
30
-
-
-30
-
Max
20
700
-
-
-
-
-
-
-
-
100
10
-10
-100
0.45
Unit
A
A
A
mA
mA
mA
A
mA
mA
mA
A
A
A
A
V
AC Electrical Characteristics
PT8A992A (Unless otherwise noted, V
CC
= 4.0, T
A
= 0 ~ 70º
C)
Sym
Description
Test conditions
f
OSC(Note)
t
FUN
f
OSC
Oscillator Frequency
Period Function Code
Carrier Frequency
R
f
=180kΩ, T
A
= 25º
C
f
OSC
=128kHz, T
A
= 25º
C
f
OSC
=128kHz, T
A
= 25º
C
Min
109
1.7
-
Typ
128
2
64
Max
146
2.3
-
Unit
kHz
ms
kHz
PT8A993A (Unless otherwise noted, V
CC
= 4.0, T
A
= 0 ~ 70º
C)
Sym
Description
Test conditions
f
OSC(Note)
t
FUN
Oscillator Frequency
Period Function Code
R
f
=180kΩ, T
A
= 25º
C
f
OSC
=128kHz, T
A
= 25º
C
Min
109
1.7
Typ
128
2
Max
146
2.3
Unit
kHz
ms
Note: The frequency of standard samples is tested on standard testing-board.
12-07-0006
4
PT0095-1
07/06/2012
PT8A992A/993A
10-Function Remote Controller
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Block diagram for PT8A991A
ON/OFF
OSCI
OSCO
SI
VI1
VI2
VT
Oscillator
Amp
Timing
Generator
Decoding
Circuit
PC
Counter
PLA
Right
Left
Backward
Forward
Turbo
F1
F2
F3
F4
VO1
VO2
VT
Detector
Latch
Circuit
LRTD
12-07-0006
5
PT0095-1
07/06/2012
嵌入式系统
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