Data Sheet
PT8A992P/993P
10-Function Remote Controller
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Features
• The PT8A992P works as the encoder and the
PT8A993P works as the decoder
• 11 output pins, 4 for forward, backward, left and
right functions, and 7 functional keys
• Operation power supply: 3.0V to 5.5V
• Auto power-off if no key pressed within 2s
(PT8A992P)
• Auto shut-down if keep pressing a key for more
than 4 minutes (PT8A992P)
• Auto shut down if no signal input for more than 5
minute (PT8A993P)
• Low operating current
• On-chip oscillator with an external resistor
• On-chip receiving amplifiers
• Few external components needed
General Description
The PT8A992P/993P is a pair of CMOS LSIs designed
for remote controlled toy car application. They have 11
control keys for controlling the corresponding motion (i.e.
forward, backward, left, right and 7 other functions) of
the remote controlled car.
Block Diagram
Figure 1. Block Diagram of PT8A992P
TDIS
OSCI
OSCO
Forward
Backward
Left
Right
F1
F2
F3
F4
F6/F7
F5
f
0
f
0
/2
SC
Oscillator
Timing
Generator
MUX
SO
Latch
Circuit
Logic
Control
PC
Counters
PT0054(16/03/01)
1
Ver:2
Data Sheet
PT8A992P/993P
10-Function Remote Controller
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Figure 2. Block Diagram of PT8A993P
ON/OFF
OSCI
OSCO
SI
VI1
VI2
VT1
VT2
Oscillator
Timing
Generator
Decoding
Circuit
PC
Counter
Amp
PLA
Right
Left
Backward
Forward
F1
F2
F3
F4
F5
F6
F7
VO1
VO2
VT
Detector
Latch
Circuit
Package and Pin Assignment
Figure 3. Package and Pin Assignment
PT8A992P
PT8A993P
18-Pin PDIP
VO2
GND
SI
OSCI
OSCO
F1
Right
F2
Left
PC
ON/OFF
F3
24-Pin PDIP
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VI2
VO1
VI1
V
CC
F5
Forward
Backward
VT2
VT1
F7
F6
F4
Right
TDIS
GND
Backward
Forward
F5
SC
F6/F7
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
Top View
PT0054(16/03/01)
2
Ver:2
Data Sheet
PT8A992P/993P
10-Function Remote Controller
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Pin Description
Table 1. Pin Description of PT8A992P
P in No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
P in Na me
Right
Typ e
I
Descr ip t ion
The rightward function selected if this pin connected to GND
For timer enable: opened or connected to V
CC
,
For timer disenable: connected to GND,
For test mode: connected to 1/2 V
CC
Ground
Backward function selected if this pin connected to GND
Forward function selected if this pin connected to GND
Function 5 select if this pin connected to GND
Output pin of the encoding signal with carrier freqency
Connect to GND to toggle between F6 and F7 of PT8A993 when working with
PT8A993
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 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
TDIS
I
GND
Backward
Forward
F5
SC
F6/F7
F4
F3
F2
SO
V
CC
PC
OSCO
OSCI
F1
Left
GND
I
I
I
O
I
I
I
I
O
P
O
O
I
I
I
PT0054(16/03/01)
3
Ver:2
Data Sheet
PT8A992P/993P
10-Function Remote Controller
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Table 2. Pin Description of PT8A993P
P in No
1, 23
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22, 24
P in Na m e
VO1, VO2
GND
SI
OSCI
OSCO
F1
Right
F2
Left
PC
ON/OFF
F3
F4
F6
F7
VT1
VT2
Backward
Forward
F5
V
CC
VI1,VI2
Typ e
O
GND
I
I
O
O
O
O
O
O
I
O
O
O
O
I
I
O
O
O
P
I
Descr ip t ion
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
F6 function output pin
F7 function output pin
Auto shut off input pin: if the voltage on this pin keeps higher than 0.095V
CC
for 3
seconds, all outputs will be shut off automatically.
Auto shut off input pin: if the voltage on this pin keeps higher than 0.095V
CC
for 3
seconds, all outputs will be shut off automatically.
Backward output pin
Forward output pin
F5 function output pin
Power supply
Input pins of invertor 1 and 2 for signal amplifier
PT0054(16/03/01)
4
Ver:2
Data Sheet
PT8A992P/993P
10-Function Remote Controller
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Functional Description
For PT8A992P, a PC pin is used to control on or off of external
power supply. When pressing any key, the PC output pin will
keeps on a high level. If none of keys is pressed within 2 sec-
onds, the PT8A992 will shut down automatically and no level
output on the PC pin. On the other hand, if any of keys is kept
pressed for 4 minutes, the PT8A992P will also shut down to
save battery power.
The PT8A993P also features Auto Power Off function when
no any signal received within 5 minutes. Two over-current pro-
tection pins VT1 and VT2 are used for current limit in accor-
dance with the toy safety standard HD271. They act to shut
down the output level if the input voltage keeps more than
0.095V
CC
for 3 seconds.
Coding Method
Each trigger pin is triggered by corresponding bit of data in
format of “1”. The data string is 18-bit and divided to four
segments, i.e., Start Code, Data Code, Parity Code and End
code, where
Start Code = 11110.
Data Code = F3 F4 F B F5 R L F1 F6 F7 F2
F = Forward
R = Right
F2 = Function 2
F6 = Function 6
B = Backward
L = Left
F3 = Function 3
F7 = Function 7
F5 = Function 5
F1= Function 1
F4 = Function 4
Parity Code = Even parity check result
End Code is for data latch.
Data code can be any combination of F, B, F5, R, L, F1, F2,
F3, F4, F6 and F7 except F&B and R&L.
Data Format
See Figure 4.
Figure 4. Data Format
"1"
Frequency: 500Hz, Duty Cycle: 3/4
"0"
Frequency: 500Hz, Duty Cycle: 1/4
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Note:
Storage Temperature ........................................................ -25
o
C to +85
o
C Stresses greater than those listed under MAXIMUM
Ambient Temperature with Power Applied ......................... 0
o
C to +70
o
C RATINGS may cause permanent damage to the
Supply Voltage to Ground Potential (Inputs & V
cc
Only) ..... -0.5 to +5.5V device. This is a stress rating only and functional
Supply Voltage to Ground Potential (Outputs & D/O Only) -0.5 to +5.5V operation of the device at these or any other condi-
DC Input Voltage ................................................................ -0.5 to +5.5V tions above those indicated in the operational sec-
DC Output Current ........................................................................ 20mA tions of this specification is not implied. Exposure
Power Dissipation ....................................................................... 500mW to absolute maximum rating conditions for extended
periods may affect reliability.
PT0054(16/03/01)
5
Ver:2
Microchip MCU
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