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PT8A978P 参数 Datasheet PDF下载

PT8A978P图片预览
型号: PT8A978P
PDF下载: 下载PDF文件 查看货源
内容描述: 5功能遥控器 [5-Function Remote Controller]
分类和应用: 消费电路商用集成电路遥控光电二极管遥控器
文件页数/大小: 12 页 / 88 K
品牌: PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
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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  
PT8A978P/978LW works as decoder  
• Five pins for five control functions  
• Operating power-supply voltage: 2.5V to 5.0V  
(977P, 977W, 978P), 2.0V to 5.0V (978LW)  
• Auto-power-off if no press on any button in 8s or  
continuously press on any button over 4 minues  
• Press on any button as wake up (977P, 977W)  
• Manual-power-off with OFF button  
• One output pin used for external power control (977P,  
977W)  
The PTA977P (or 977W) and PT8A978P (or 978LW)  
provide a complete control functions to the remote-  
controlled toy. The PT8A977P/977W has five input  
pins corresponding with the five function buttons i.e,  
forward, backward, rightward, leftward and turbo. The  
encoding circuit in the PT8A977P/977W sends digital  
codes to the two output pins SO and SC. The digital  
codes correspond to the definite function buttons or  
their combinations. The SO and SC outputs are used  
in wireless and infra-red applications respectively.  
The PT8A978P (or 978LW) has five output pins  
corresponding with the five actions. The received  
signals are amplified by the three-stage amplifier, and  
then the appropriate amplified signals are sampled,  
fault-tolerantly checked and decoded to control the  
actions of the remote-controlled toy.  
• On-chip oscillator with an external resistor  
• On-chip reversing amplifiers (978P, 978LW)  
• Low operating current  
• Few external components needed  
• Package: 14-pin DIP, 14-pin SOIC, 16-pin DIP  
and 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%.  
Ordering Information  
Part No.  
PT8A977P  
PT8A977W  
PT8A978P  
PT8A978LW  
Package  
14-pin DIP  
14-pin SOIC  
16-pin DIP  
16-pin SOIC  
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.  
PT0074(10/01)  
Ver:1  
1