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PDF PT-8A978P Data sheet ( Hoja de datos )
| Número de pieza | PT-8A978P | |
| Descripción | 5-Function Remote Controller | |
| Fabricantes | Pericom Semiconductor Corporation | |
| Logotipo |  |
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Data Sheet
PT8A977P/977W/978P/978LW
5-Function Remote Controller
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Features
General Description
• PT8A977P/977W works as encoder and
The PTA977P (or 977W) and PT8A978P (or 978LW)
PT8A978P/978LW works as decoder
provide a complete control functions to the remote-
• Five pins for five control functions
controlled toy. The PT8A977P/977W has five input
• Operating power-supply voltage: 2.5V to 5.0V pins corresponding with the five function buttons i.e,
(977P, 977W, 978P), 2.0V to 5.0V (978LW)
forward, backward, rightward, leftward and turbo. The
• Auto-power-off if no press on any button in 8s or encoding circuit in the PT8A977P/977W sends digital
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continuously press on any button over 4 minues codes to the two output pins SO and SC. The digital
• Press on any button as wake up (977P, 977W)
codes correspond to the definite function buttons or
• Manual-power-off with OFF button
their combinations. The SO and SC outputs are used
• One output pin used for external power control (977P, in wireless and infra-red applications respectively.
977W)
• On-chip oscillator with an external resistor
The PT8A978P (or 978LW) has five output pins
• On-chip reversing amplifiers (978P, 978LW)
corresponding with the five actions. The received
• Low operating current
signals are amplified by the three-stage amplifier, and
• Few external components needed
then the appropriate amplified signals are sampled,
• Package: 14-pin DIP, 14-pin SOIC, 16-pin DDaItPaSheet4faUu.clto-mtolerantly checked and decoded to control the
and 16-pin SOIC
actions of the remote-controlled toy.
DataShee
Ordering Information
Par t No.
Package
PT8A977P
14-pin DIP
PT8A977W
14-pin SOIC
PT8A978P
16-pin DIP
PT8A978LW
16-pin SOIC
There is an internal oscillator in the PT8A977P/977W
and 978P/978LW respectively. By adding an external
resistor conveniently, the oscillator will be
constructed. The oscillator frequency can be adjusted
by the external resistor. The relative error between
the frequencies of the two on-chip oscillators in the
PT8A977P/977W and PT8A978P/978LW must be
less than ±25%.
The auto-power-off function is achieved by an internal
counter. The PC output is used to control on/off state
of the external power supply. Pressing OFF button
can also shut down the power supply. Press on any
function button will wake up the chip promptly.
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Data Sheet
PT8A977P/977W/978P/978LW
5-Function Remote Controller
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Encoding Input and Decoding Result
Number of Function Codes (n) W1
4
10
16
22
28
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34
40
46
52
58
64
Decoding Results
End Code
Forward (Pulse)
Forward (High level)
Turbo
Forward (High level) & Left
Forward (High level) & Right
Backward
Backward & Right
Backward & Left
Left
Right
PC Output Timing of 977P/977W
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VCC
OFF
PC
8s
Note: Pins 1, 4, 5, 6 and 14 are High.
VCC
OFF
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£ 8s
VCC
Press Function buttons
PC
8s
8s 4 Minutes
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Data Sheet
PT8A977P/977W/978P/978LW
5-Function Remote Controller
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Mechanical Diagram of 16-pin SOIC
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet PT-8A978P.PDF ] | |
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