PT8A970 [ETC]
7-Function Remote Controller? ; 7功能的遥控器？
| 型号： | PT8A970 |
| 厂家： | 
ETC |
| 描述： | 7-Function Remote Controller?
|
| 文件： | 总12页 (文件大小：72K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Features
General Description
• The PT8A9701P works as the encoder and the
PT8A974P/974LP works as the decoder
• Nine output pins, 5 for forward, backward, left,
right and turbo functions, and 3 functional keys
• Operation power supply for PT8A9701: 3V to 12V
• Auto power-off if no key pressed (PT8A9701P)
• Motor current limit to meet toy safety standard
HD271 (PT8A974P/974LP)
The PT8A9701P and PT8A974P/974LP is a pair of
CMOS LSIs designed for remote controlled toy car
application. They have eight control keys for
controlling the corresponding motion, i.e., forward,
backward, left, right, turbo and 3 functional keys, of
the remote controlled car. They also have ‘Forward
(Backward)’ and ‘Turbo’ combination application.
• Low operating current
Ordering Information
• On-chip oscillator with an external resistor
• On-chip reversing amplifiers
Device
Name
Encoder
Decoder
PT8A974P PT8A974LP
Part No. PT8A9701P
Package 16-pin PDIP
• Built-in 3.7V Zener (Vz) (PT8A974P) and 3.1V
Zener (Vz) (PT8A974LP)
20-pin PDIP
• Few external components needed
Block Diagram
Figure 1. Block Diagram of PT8A9701P
f0/2
SC
SO
Timing
Generator
OSCI
Oscillator
OSCO
MUX
Forward
Backward
Left
VCC
Latch
Circuit
Logic
Control
Right
Turbo
F1
PC
F2
F3/F4
Counters
PT0090(05/02)
Ver:1
1
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Figure 2. Block Diagram of PT8A974P/974LP
Timing
Generator
OSCI
OSCO
Oscillator
Counter
PLA
Decoding
Circuit
SI
Amp
VO1
VO2
Right
Left
Backward
Forward
Turbo
F1
VI1
VI2
Latch
Circuit
VT1
VT
Detector
VT2
VCC
F2
F3
F4
Package and Pin Assignment
PT8A9701P
PT8A974P/974LP
16-Pin PDIP
20-Pin PDIP
20
1
19
2
VI2
VO1
VI1
VCC
Turbo
F4
Forward
F3
Backward
VO2
GND
SI
OSCI
OSCO
F1
Right
F2
Left
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Left
F1
OSCI
OSCO
PC
VCC
SO
F2
Right
NC
GND
18
3
17
4
16
5
15
6
14
7
Backward
Forward
Turbo
SC
13
8
F3/F4
12
9
11
10
VT2
VT1
Top View
PT0090(05/02)
Ver:1
2
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Pin Description
Table 1. Pin Description of PT8A9701P
Pin No
Pin Name
Right
NC
Type
Description
Rightward function selected if this pin connected to GND
No connection
I
1
2
-
GND
Backward
Forward
Turbo
SC
GND
3
Ground
I
I
4
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
5
I
6
O
I
7
F3/F4
F2
8
I
9
SO
O
P
O
O
I
10
11
12
13
14
15
16
VCC
PC
Power control output pin
OSCO
OSCI
F1
Oscillator output pin
Oscillator input pin
I
Function 1 selected if connected to GND
Leftward function selected if this pin connected to GND
Left
I
PT0090(05/02)
Ver:1
3
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Table 2. Pin Description of PT8A974P/974LP
Pin No
Pin Name
VO2, VO1
GND
SI
Type
O
Description
1, 19
Output pins of amplifiers 1 and 2
2
3
4
5
6
7
8
9
GND Ground
I
Input pin for encoded signal
OSCI
OSCO
F1
I
Oscillator input pin
Oscillator output pin
F1 function output pin
Rightward output pin
F2 function output pin
Leftward output pin
O
O
O
O
O
Right
F2
Left
Auto shut-off input pin: If voltage on VT1 pin is over 0.095VCC for 3 sec, all outputs
will be shut off automatically.
10
11
VT1
VT2
I
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
13
Backward
F3
O
O
O
O
O
P
Backward output pin
F3 function output pin
Forward output pin
F4 function output pin
Turbo output pin
14
Forward
F4
15
16
Turbo
VCC
17
Power supply
18, 20
VI1,VI2
I
Input pins of amplifiers 1 and 2
PT0090(05/02)
Ver:1
4
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Coding Method
Functional Description
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
In normal operation without ‘Turbo’, forward (backward) out-
put 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 func-
tion is depicted in Table 3.
Start Code = 11110.
Data Code = F
B T R L F1 F3 F4 F2
F = Forward
R = Right
B = Backward
L = Left
T = Turbo
F1= Function 1
F4 = Function4
Timing Diagram
F2 = Function 2
F3 = Function 3
Data Format
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
Output from PT8A974P/974LP
Input to PT8A970P
Forward
Backward
Low
Turbo
Low
Forward
Backward
60Hz
Low
High
Low
60Hz
Low
Low
Forward + Turbo
Backward + Turbo
High
High
High
Figure 4. Data Format
"1"
"0"
Frequency: 500Hz, Duty Cycle: 3/4
Frequency: 500Hz, Duty Cycle: 1/4
PT0090(05/02)
Ver:1
5
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 +13V
Supply Voltage to Ground Potential (Outputs & D/O Only) ................................................................................ -0.5 to +13V
DC Input Voltage ................................................................................................................................................ -0.5 to +13V
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(05/02)
Ver:1
6
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Recommended Operation Conditions
Table 4. Recommended Operation Conditions
Sym
ICC
Description
Supply Current for PT8A974P
Supply Current for PT8A974LP
Input HIGH Voltage
Min
Typ
Max
30
Units
mA
mA
V
30
VIH
VIL
FOSC
TA
0.7VCC
Input LOW Voltage
0
0.3VCC
146
V
Oscillator Frequency
109
0
128
kHz
OC
Operation Temperature
70
DC Electrical Characteristics
Table 5. DC Electrical Characteristics of PT8A9701P
Sym
VZ
Description
Voltage of Zenner
Test Conditions
Min
Typ
3.7
-5
Max
Units
IZ = 2~30mA
3.4
-3
4.0
V
Output HIGH Current - PC Pin
mA
Output HIGH Currentl -
SC and SO Pins
-3
-5
mA
IOH
VOH = VCC-0.5V
Output HIGH Current -
OSCO Pin
-200
-1000
uA
mA
mA
Output LOW Current - PC Pin
2
2
3
3
Output LOW Currentl -
SC and SO Pins
IOL
VOL = 0.5V
Output LOW Current -
OSCO Pin
200
1000
1
uA
uA
Input HIGH Current -
Forward, Backward, Left, Right,
Turbo, F1, F2, F3/F4 and OSCI
Pins
IIH
VIH = VCC
Input LOW Current -
Forward, Backward, Left, Right,
Turbo, F1, F2 and F3/F4 Pins
-20
-40
-100
-10
uA
uA
IIL
VIL = 0V
Input LOW Current - OSCI Pin
Note: These specifications apply for VCC = 3.5V and TA = 25OC, unless otherwise specified.
PT0090(05/02)
Ver:1
7
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Table 6. DC Electrical Characteristics of PT8A974P/974LP
Sym
Description
Test Conditions
Min
-300
Typ
Max
-800
Units
uA
Output HIGH Current -
VO1, VO2 and OSCO Pins
Output HIGH Current -
Forward, Backward, Left and
Right Pins
VOH = VCC-0.5V
IOH
-3
mA
uA
Output HIGH Current -
Turbo, F1, F2, F3 and F4 Pins
-3
Output LOW Current -
VO1, VO2 and OSCO Pins
200
1000
Output LOW Current -
Forward, Backward, Left, Right
and Turbo Pins
IOL
VOL = 0.5V
2
2
3
3
mA
Output LOW Current -
F1, F2, F3 and F4 Pins
Input HIGH Current - OSCI,
VI1, VI2 and SI Pins
10
50
uA
uA
uA
V
IIH
VIN = VCC
Input HIGH Current - VT1 and
VT2 Pins
Input LOW Current - OSCI,
VT1, VT2, VI1, VI2 and SI Pin
IIL
VIN = 0V
-10
0.40
0.35
4
Over-Current Limit -
VT1 and VT2 Pins for 974P
0.30
0.25
3.4
VT
Over-Current Limit -
VT1 and VT2 Pins for 974LP
V
Voltage of Zenner - VCC Pin of
PT8A974P
3.7
3.1
V
VZ
IZ = 2~30mA
Voltage of Zenner - VCC of
PT8A974LP
2.8
3.4
V
Note: These specifications apply for TA = 25°C, VCC = 3.5V (974P), VCC = 3.0V (974LP), unless otherwise specified.
PT0090(05/02)
Ver:1
8
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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AC Electrical Characteristics
Table 7. AC Electrical Characteristics of PT8A9701P
Sym
Description
Test Conditions
Min
109
Typ
128
Max
146
Units
kHz
fOSC
(Note2)
Oscillator Frequency
Rf = 200kΩ
tFUN
tSTA
fCSC
tOFF
VCC
ICC
Period of Function Code
Start-Code Period
Carrier Frequency
Auto-off Time
fOSC = 128kHz
fOSC = 128kHz
fOSC = 128kHz
fOSC = 128kHz
-
1.7
1.7
2
2
2.3
2.3
ms
ms
kHz
s
64
2
Power Supply Range
Supply Current
3
9
12
30
V
Output Unloaded
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
Description
Test Conditions
Min
Typ
Max
Units
fOSC
(Note2)
Oscillator Frequency
Rf = 200kΩ
109
128
146
kHz
tFUN
tSTA
ICC
Period of Function Code
Start-Code Period
Supply Current
fOSC = 128kHz
fOSC = 128kHz
1.7
1.7
2
2
2.3
2.3
30
ms
ms
Output Unloaded
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(05/02)
Ver:1
9
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Figure 5. Typical Application Circuit of PT8A9701P
PT8A9701P
9
8
7
6
5
4
3
2
1
F2
F3/F4
1 0
1 1
1 2
1 3
1 4
1 5
1 6
S O
S C
V c c
P C
Turbo
Forward
Backward
G N D
O S C O
O S C I
F1
Test
Left
Right
PT0090(05/02)
Ver:1
10
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Figure 6. Typical Application Circuit of PT8A974P
11
12
13
14
15
16
17
18
19
2 O
10
9
VTI
Left
LRTD/VT2
Backward
F3
8
F2
7
Right
F1
Forward
F4
6
5
Turbo
Vcc
O S C O
OSCI
SI
4
3
VI1
2
G N D
V O 2
V O 1
1
VI2
PT8A974P
PT0090(05/02)
Ver:1
11
Data Sheet
PT8A9701P/974P/974LP
8-Function Remote Controller
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Notes
Pericom Technology Inc.
Email: support@pti.com.cn
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(05/02)
Ver:1
12
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