PERICOM PT8A9701P

Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Features
General Description
• The PT8A9701P works as the encoder and the
The PT8A9701P and PT8A974P/974LP is a pair of
PT8A974P/974LP works as the decoder
CMOS LSIs designed for remote controlled toy car
• Nine output pins, 5 for forward, backward, left,
application. They have eight control keys for
right and turbo functions, and 3 functional keys
controlling the corresponding motion, i.e., forward,
• Operation power supply for PT8A9701: 3V to 12V
backward, left, right, turbo and 3 functional keys, of
(with series resistor)
the remote controlled car. They also have ‘Forward
• Auto power-off if no key pressed (PT8A9701P)
(Backward)’ and ‘Turbo’ combination application.
• Motor current limit to meet toy safety standard
Ordering Information
HD271 (PT8A974P/974LP)
• Low operating current
Device
Na m e
E n cod er
• On-chip reversing amplifiers
Part No.
PT8A9701P
• Built-in 3.7V Zener (Vz) (PT8A974P) and 3.1V
Package
16-pin PDIP
• On-chip oscillator with an external resistor
Decod er
PT8A974P
PT8A974LP
20-pin PDIP
Zener (Vz) (PT8A974LP)
• Few external components needed
Block Diagram
Figure 1. Block Diagram of PT8A9701P
f0/2
OSCI
OSCO
Forward
Backward
Left
Right
Turbo
F1
F2
F3/F4
Oscillator
Timing
Generator
Latch
Circuit
SC
SO
MUX
VCC
Logic
Control
PC
Counters
PT0090(09/02)
1
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Figure 2. Block Diagram of PT8A974P/974LP
OSCI
OSCO
Oscillator
SI
Amp
VI1
VO1
VI2
VO2
Timing
Generator
Counter
Decoding
Circuit
PLA
Latch
Circuit
VT1
VT
Detector
VT2
VCC
Right
Left
Backward
Forward
Turbo
F1
F2
F3
F4
Package and Pin Assignment
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
PT8A974P/974LP
20-Pin PDIP
VO2
GND
SI
OSCI
OSCO
F1
Right
F2
Left
VT1
Left
F1
OSCI
OSCO
PC
VCC
SO
F2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VI2
VO1
VI1
VCC
Turbo
F4
Forward
F3
Backward
VT2
Top View
PT0090(09/02)
2
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Pin Description
Table 1. Pin Description of PT8A9701P
P in No
P in Na me
Typ e
1
Right
I
Rightward function selected if this pin connected to GND
2
NC
-
No connection
3
GND
GND
4
Backward
I
Backward function selected if this pin connected to GND
5
Forward
I
Forward function selected if this pin connected to GND
6
Turbo
I
Turbo function selected if this pin connected to GND
7
SC
O
Output pin of the encoding signal with carrier freqency
8
F3/F4
I
Able to toggle between Function 3 and Function 4 if connected to GND
9
F2
I
Function 2 selected if connected to GND
10
SO
O
Output pin of the encoding signal without carrier freqency
11
VCC
P
Power supply
12
PC
O
Power control output pin
13
OSCO
O
Oscillator output pin
14
OSCI
I
Oscillator input pin
15
F1
I
Function 1 selected if connected to GND
16
Left
I
Leftward function selected if this pin connected to GND
PT0090(09/02)
Descr ip t ion
Ground
3
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Table 2. Pin Description of PT8A974P/974LP
P in No
P in Na me
Typ e
1, 19
VO2, VO1
O
2
GND
GND
3
SI
I
Input pin for encoded signal
4
OSCI
I
Oscillator input pin
5
OSCO
O
Oscillator output pin
6
F1
O
F1 function output pin
7
Right
O
Rightward output pin
8
F2
O
F2 function output pin
9
Left
O
Leftward output pin
10
VT1
I
Auto shut-off input pin: If voltage on VT1 pin is over 0.095VCC for 3 sec, all outputs
will be shut off automatically.
11
VT2
I
Auto shut-off input pin: If voltage on VT2 pin is over 0.095VCC for 3 sec, all outputs
will be shut off automatically.
12
Backward
O
Backward output pin
13
F3
O
F3 function output pin
14
Forward
O
Forward output pin
15
F4
O
F4 function output pin
16
Turbo
O
Turbo output pin
17
VCC
P
Power supply
18, 20
VI1,VI2
I
Input pins of amplifiers 1 and 2
PT0090(09/02)
Descr ip t ion
Output pins of amplifiers 1 and 2
Ground
4
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Functional Description
Coding Method
In normal operation without ‘Turbo’, forward (backward) output pin of the decoder PT8A974P/974LP sends out a 60Hz
signal. In operation with ‘Forward (Backward)’ and ‘Turbo’
combined, the output signal will be completely high. This function is depicted in Table 3.
Each trigger pin is triggered by corresponding bit of data in
format of “1”. The data string is 16-bit and divided to four
segments, i.e., Start Code, Data Code, Parity Code and End
code, where
Start Code = 11110.
Data Code = F B T R L F1 F3 F4 F2
Timing Diagram
F = Forward
R = Right
F2 = Function 2
Data Format
B = Backward
L = Left
F3 = Function 3
T = Turbo
F1= Function 1
F4 = Function4
Parity Code = Even parity check result
End Code is for data latch.
See Figure 4.
Data code can be any combination of F, B, T, R, L, F1, F2, F3
and F4 except F&B and R&L.
Table 3
O u t p u t fr om P T 8A974P /974L P
I n p u t t o P T 8A970P
Forward
Backward
Turbo
Forward
60Hz
Low
Low
Backward
Low
60Hz
Low
Forward + Turbo
High
Low
High
Backward + Turbo
Low
High
High
Figure 4. Data Format
PT0090(09/02)
"1"
Frequency: 500Hz, Duty Cycle: 3/4
"0"
Frequency: 500Hz, Duty Cycle: 1/4
5
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Maximum Ratings PT8A9701P
Storage Temperature ....................................................................................................................................... -25oC to +85oC
Ambient Temperature with Power Applied ........................................................................................................ 0oC to +70oC
Supply Voltage to Ground Potential (Inputs & VCC 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
Maximum Ratings PT8A974P
Storage Temperature ....................................................................................................................................... -25oC to +85oC
Ambient Temperature with Power Applied ........................................................................................................ 0oC to +70oC
Supply Voltage to Ground Potential (Inputs & VCC 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 ....................................................................................................................................................... 30mA
Power Dissipation ...................................................................................................................................................... 500mW
Maximum Ratings PT8A974LP
Storage Temperature ....................................................................................................................................... -25oC to +85oC
Ambient Temperature with Power Applied ........................................................................................................ 0oC to +70oC
Supply Voltage to Ground Potential (Inputs & VCC Only) ................................................................................... -0.5 to +5.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ............................................................................... -0.5 to +5.0V
DC Input Voltage ............................................................................................................................................... -0.5 to +5.0V
DC Output Current ....................................................................................................................................................... 30mA
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 conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
reliability.
PT0090(09/02)
6
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Recommended Operation Conditions
Table 4. Recommended Operation Conditions
Sym
ICC
Descr ip t ion
Min
Ma x
Un it s
Supply Current for PT8A974P
30
mA
Supply Current for PT8A974LP
30
mA
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
FOSC
Oscillator Frequency
109
TA
Operation Temperature
0
Typ
0.7VCC
V
0
0.3VCC
V
128
146
kHz
O
70
C
DC Electrical Characteristics
Table 5. DC Electrical Characteristics of PT8A9701P
Sym
Descr ip t ion
Test C on d it ion s
Min
Typ
Ma x
Un it s
VZ
Voltage of Zenner
IZ = 2~30mA
3.4
3.7
4.0
V
-3
-5
mA
-3
-5
mA
Output HIGH Current - PC Pin
IOH
IOL
Output HIGH Currentl SC and SO Pins
VOH = VCC-0.5V
Output HIGH Current OSCO Pin
-200
Output LOW Current - PC Pin
2
3
mA
2
3
mA
Output LOW Currentl SC and SO Pins
VOL = 0.5V
Output LOW Current OSCO Pin
IIH
IIL
Input HIGH Current Forward, Backward, Left, Right,
Turbo, F1, F2, F3/F4 and OSCI
Pins
Input LOW Current Forward, Backward, Left, Right,
Turbo, F1, F2 and F3/F4 Pins
-1000
200
VIH = VCC
-20
-40
uA
1000
uA
1
uA
-100
uA
-10
uA
VIL = 0V
Input LOW Current - OSCI Pin
Note: These specifications apply for VCC = 3.5V and TA = 25 C, unless otherwise specified.
O
PT0090(09/02)
7
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Table 6. DC Electrical Characteristics of PT8A974P/974LP
Sym
Descr ip t ion
Test C on d it ion s
Output HIGH Current VO1, VO2 and OSCO Pins
IOH
IOL
Output HIGH Current Forward, Backward, Left and
Right Pins
Min
-300
VOH = VCC-0.5V
-3
Output LOW Current VO1, VO2 and OSCO Pins
200
IIL
Input LOW Current - OSCI,
VT1, VT2, VI1, VI2 and SI Pin
-800
uA
VOL = 0.5V
2
1000
uA
3
mA
2
3
Input HIGH Current - OSCI,
VI1, VI2 and SI Pins
Input HIGH Current - VT1 and
VT2 Pins
Un it s
mA
Output LOW Current F1, F2, F3 and F4 Pins
IIH
Ma x
-3
Output HIGH Current Turbo, F1, F2, F3 and F4 Pins
Output LOW Current Forward, Backward, Left, Right
and Turbo Pins
Typ
10
uA
50
uA
-10
uA
VIN = VCC
VIN = 0V
Over-Current Limit VT1 and VT2 Pins for 974P
0.30
0.40
V
Over-Current Limit VT1 and VT2 Pins for 974LP
0.25
0.35
V
Voltage of Zenner - VCC Pin of
PT8A974P
3.4
3.7
4
V
2.8
3.1
3.4
V
VT
VZ
Voltage of Zenner - VCC of
PT8A974LP
IZ = 2~30mA
Note: These specifications apply for TA = 25°C, VCC = 3.5V (974P), VCC = 3.0V (974LP), unless otherwise specified.
PT0090(09/02)
8
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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AC Electrical Characteristics
Table 7. AC Electrical Characteristics of PT8A9701P
Sym
Descr ip t ion
Test C on d it ion s
Min
Typ
Ma x
Un it s
fOSC
(Note2)
Oscillator Frequency
Rf = 200kΩ
109
128
146
kHz
tFUN
Period of Function Code
fOSC = 128kHz
1.7
2
2.3
ms
tSTA
Start-Code Period
fOSC = 128kHz
1.7
2
2.3
ms
fCSC
Carrier Frequency
fOSC = 128kHz
64
kHz
tOFF
Auto-off Time
fOSC = 128kHz
2
s
VCC
Power Supply Range
-
ICC
Supply Current
Output Unloaded
3
9
12
V
30
mA
Notes:
1. These specifications apply for VCC = 3.5V and TA = 25OC, unless otherwise specified.
2.The frequency of standard samples is tested on standard testing-board.
Table 8. AC Electrical Characteristics of PT8A974P/974LP
Sym
Descr ip t ion
Test C on d it ion s
Min
Typ
Ma x
Un it s
fOSC
(Note2)
Oscillator Frequency
Rf = 200kΩ
109
128
146
kHz
tFUN
Period of Function Code
fOSC = 128kHz
1.7
2
2.3
ms
tSTA
Start-Code Period
fOSC = 128kHz
1.7
2
2.3
ms
ICC
Supply Current
Output Unloaded
30
mA
Notes:
1. These specifications apply for TA = 25°C, VCC = 3.5V (974P), VCC = 3.0V (974LP), unless otherwise specified.
2. The frequency of standard samples is tested on standard testing-board.
PT0090(09/02)
9
Ver:2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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C4
0.02u
C8
150P
R6
6.8K
R5
100
Q1
C945P
CR1
27.145MHz
PT8A9701P
9
F2
F3/F4
10
SO
SC
11
Vcc
12
PC
13
OSCO
14
OSCI
15
F1
16
Left
7
6
PT0090(09/02)
5
F
Forward
GND
Test
3
2
1
R
Right
4
B
Backward
L
F1
R2
200K
T
Turbo
8
F3/F4 F2
C2
203
R1
470
R4
120K
C7
47P
L4
2.2uH
D1
LED
C6
47P
R3
3.3K
R7
33K
C5
47
R8
100
Q2
C945
C3
47P
L3
2.2uH
C1
100uF
L2
7 1/4T
C9
100P
L1
6.8uH
9V
SW
A1
ANTENNA
B1
Figure 5. Typical Application Circuit of PT8A9701P
10
Ver:2
R1
11
12
13
14
15
16
17
18
19
20
VT2
Left
VT1
Right
F2
Backward
F3
Forward
Vcc
Turbo
SI
OSCI
OSCO
F1
VI1
F4
VO1
VO2
GND
PT8A974
VI2
11
10
9
8
7
6
5
4
3
2
1
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
R5
R20
1K
104
R13
10K
Q6
8050
R14
10K
Q4
8050
R19
1K
H1815
Q8
Q7
H1815
R8
C11 200K
222
2.2K
R2
330
Q5
M3 8550
R15
10K
Q3
8550
R3
330
Q16
D882
R18
10K
Q20
D882
2.2K
Q10
D882
R16
10K
R24
1K
R23
1K
Q14
D882
R11
2.2M
R21
104
104
R6
Q17
H1815
Q18
H1815
Q11
H1815
Q12
H1815
1K
C9
R10
470P 2.2M
R27
220
Q15
B772
Q19
B772 M2
R26
220
R28
220
Q9
B772
C7
104
SW
Figure 6. Typical Application Circuit of PT8A974P
R12
R17
10K
Ver:2
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PT0090(09/02)
Q1
C380
R22
1K
C8
104
R7
3.3k
Q13
B772 M1
R25
220
R9
2.2k
R4
820
180K
C6
4.7uF
C2
103
B1
6V
L2
L1
C3
47P
4.7uH
330
C12
220uF
C10
104
C1
5P
C5
47P
7T
C4
472
ANTENNA
27MHz
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Notes
Pericom Technology Inc.
Email: [email protected]
Web Site: www.pti.com.cn, www.pti-ic.com
China:
No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, China
Tel: (86)-21-6485 0576
Fax: (86)-21-6485 2181
Asia Pacific:
Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, Hongkong
Tel: (852)-2243 3660
Fax: (852)- 2243 3667
U.S.A.:
2380 Bering Drive, San Jose, California 95131, USA
Tel: (1)-408-435 0800
Fax: (1)-408-435 1100
Pericom Technology Incorporation reserves the right to make changes to its products or specifications at any time, without notice, in order to improve
design or performance and to supply the best possible product. Pericom Technology does not assume any responsibility for use of any circuitry described
other than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free from
patent infringement or other rights, of Pericom Technology Incorporation.
PT0090(09/02)
12
Ver:2