Data Sheet
PT8A976/976A/976B
3/2-Function Decoder for Remote Controller
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Features
Common features
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Operating power-supply voltage range: 2.0 to 5.5V
Manual-powe-on/off with ON/OFF button
One output pin used for external power control
On-chip oscillator with an external resistor
On-chip reversing amplifiers
Low operating current
Few external components needed
Package: 16-pin DIP and 16-pin SOIC
Introduction
The PT8A976, PT8A976A and PT8A976B are CMOS LST
designed for the remote controlled toy. The received signal is
amplified by the three-stage amplifier, and then the appropri-
ate amplified signal is sampled, fault-tolerantly checked and
decoded to control the actions of the remote-controlled
toy.There is an oscillator in all of the PT8A976 , PT8A976A
and PT8A976B. By adding an external resistor conveniently,
the oscillator will be constructed. The oscillator frequency
can be adjusted by the external resistor. Pressing the ON/OFF
button can control the output level of the PC pin.
PT8A976, the auto-power-off function is achieved by an in-
ternal counter. When the PT8A976 is powered on the counter
is reset and begin to count. Any received encoding signal also
reset the counter. The PC output pin will keep on a high level
until the counter counts up to about 6 minutes. The PC output
is used to control on/off state of the external power supply.
PT8A976A/976B not provide auto-power-off function.
PT8A976/976A have four output pins corresponding with the
three actions: Forward (Forward), Backward and Left.
PT8A976B has only two output pins corresponding with the
two actions: Forward and Backward.
PT8A976
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Four output pins for three functions
Auto-power-off if no signals received in 6 minutes
PT8A976A
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Four output pins for three functions
Manual Power on/off function
PT8A976B
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Two output pins for three functions
Compatible with RX3 and MR3
Ordering Information
Pa r t No.
PT8A976P/976AP/976BP
PT8A976BW
PT8A976BDE
Pa ck a ge
16-pin DIP
16-pin SOIC
Die Form
Logic Block Diagram
PT8A976’s Logic Block Diagram
ON/OFF
OSCI
Oscillator
OSCO
Timing
Generator
6 Minutes
Counter
Power
Control
PC
SI
Amp.
Signal Sample
and
Fault-Tolerant
Check
VO1
FORWARD
Decoding
Circuit
Output
Circuit
FORWARD
BACKWARD
LEFT
VI1
Amp.
VI2
Amp.
VO2
PT0081(08/02)
1
Ver:5
Data Sheet
PT8A976/976A/976B
3/2-Function Decoder for Remote Controller
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PT8A976A’s Logic Block Diagram
ON/OFF
OSCI
Oscillator
OSCO
Timing
Generator
Power
Control
PC
SI
Amp.
Signal Sample
and
Fault-Tolerant
Check
VO1
FORWARD
Decoding
Circuit
Output
Circuit
FORWARD
BACKWARD
LEFT
VI1
Amp.
VI2
Amp.
VO2
PT8A976B’s Logic Block Diagram
OSCI
Oscillator
OSCO
Timing
Generator
SI
Amp.
Signal Sample
and
Fault-Tolerant
Check
VO1
Decoding
Circuit
Output
Circuit
FORWARD
BACKWARD
VI1
Amp.
VI2
Amp.
VO2
PT0081(08/02)
2
Ver:5
Data Sheet
PT8A976/976A/976B
3/2-Function Decoder for Remote Controller
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Product Pin Configuration and Description
PT8A976P/976AP Pin Configuration
VO2
PC
GND
SI
OSCI
NC
OSCO
BACKWARD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VI2
VO1
VI1
ON/OFF
V
CC
FORWARD
FORWARD
LEFT
PT8A976BP/976BW Pin Configuration
VO2
NC
GND
SI
OSCI
NC
OSCO
BACKWARD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VI2
VO1
VI1
NC
V
CC
FORWARD
NC
NC
Pad Loocation
PT8A976BDE Pad Location 1
(Die Number: CT002210)
GND
IS
NC
VO2
VI2
VO1
VI1
Die No.
(CT002210)
NC
V
CC
OSCI
FORWARD
NC
NC
OSCO
BACKWARD
NC
1415um
1515um
Pad Name
X Coordinate
VO2
589
NC
-
GND
122
SI
158
OSCI
101
NC
-
OSCO
426
BACKWARD
798
Note: Substrate is connected to Vcc.
PT0081(08/02)
Pad Coordinates
Y Coordinate
Pad Name
1195.5
NC
-
NC
1090.5
FORWARD
946.5
V
CC
578.5
NC
-
VI1
120.5
VO1
101.5
X Coordinate
-
-
1315
1315
-
1259
1019
829
Y Coordinate
-
-
528
749.5
-
1150
1195.5
1150
3
Ver:5
Data Sheet
PT8A976/976A/976B
3/2-Function Decoder for Remote Controller
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PT8A976/976A/976B Pin/Pad Description
Pin No.
1
2*
3
4
5
6
7
8
9*
10*
11
12
13*
14
15
16
Pin/Pad Name
VO2
PC
GND
SI
OSCI
NC
OSCO
BACKWARD
LEFT
FORWARD
FORWARD
V
CC
ON/OFF
VI1
VO1
VI2
Description
Output pin for the amplifier 2
Power control output pin
Negative power supply
Input pin of the encoding signal
Oscillator input pin
No connection
Oscillator output pin
Backward output pin
Left output pin
Reversing output of the forward pin
Forward output pin
Positive power supply
Input pin used to control the output level of the PC, with pull-up resistor.
Input pin for the amplifier 1
Output pin for the amplifier 1
Input pin for the amplifier 2
Note:
*These pins of PT8A976B are NC (no connection)
PT0081(08/02)
4
Ver:5
Data Sheet
PT8A976/976A/976B
3/2-Function Decoder for Remote Controller
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Absolutely Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
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Storage Temperature
Ambient Temperature with Power Applied
Supply Voltage to Ground Potential (Inputs & V
CC
Only)
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-25°C to +85°C
-10°C to +40°C
Electrical Charateristics of PT8A976/976A/976B
DC Electrical Charateristics
(Over the Operating Rating, T
A
= -10°C to +40°C, V = 4.0V± 10%)
CC
Parameter
V
CC
Description
Supply voltage
Supply current with the feedback
resister of the amplifier
Supply current without the feedback
resister of the amplifier
Test Condition
I
CC
V
CC
=4.0V, T=25
O
C*
V
CC
=4.0V, T=25
O
C**
V
CC
=4.0V, T=25
O
C, O FF
STATE
I
STB
Standby current with the feedback
resister of the amplifier
Standby current without the feedback
V
CC
=4.0V, T=25
O
C, O FF
resister of the amplifier
STATE
I
IL
I
IH
V
IL
V
IH
V
OH
V
OL
I
OH
I
OL
Input LO W current
Input HIGH current
Input low voltage
Input high voltage
O utput high voltage
O utput low voltage
O utput high current
O utput low current
For O N /O FF pin, V
IN
=0V
For O N /O FF pin, V
IN
=V
CC
Guaranteed Logic LO W
level on O N /O FF pin
Guaranteed Logic HIGH
level on O N /O FF pin
V
CC
- 0.5
V
CC
- 0.5
I
OUT
= 1.5mA
I
OUT
= 200uA
V
OUT
=
V
CC
- 0.5V
V
OUT
= 0.5V
Note:
* Output unload; 2.2MΩ feedback resistors for the two reversing amplifiers; 300KΩ external resistor for the on-chip oscillator.
** Output unload; VI1 pin, VI2 pin and SI pin connect to GND; 300KΩ external resister for the on-chip oscillator.
PT0081(08/02)
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Supply Voltage to Ground Potential (Outputs & D/O Only)
DC Input Voltage
DC Output Current
Power Dissipation
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-0.5V to +6.5V
-0.5V to +6.5V
-0.5V to +6.5V
20 mA
500mW
Note:
Stresses greater than those listed under MAXIMUM
RATING 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 indi-
cated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect reliability.
Min
2.0
Type
4.0
Max
5.5
3.0
3.0
Unit
V
mA
mA
20
uA
10
- 60
+1
0.5
uA
uA
uA
V
V
V
0.5
- 1. 5
100
V
mA
uA
5
Ver:5
PCB设计
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