8A978P Overview
The PTA977P (or 977W) and PT8A978P (or 978LW) provide a plete control functions to the remotecontrolled 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.
8A978P Key Features
- PT8A977P/977W works as encoder and PT8A978P/978LW works as decoder
- Five pins for five control functions
- 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)
- On-chip oscillator with an external resistor
- On-chip reversing amplifiers (978P, 978LW)
- Low operating current
- Few external ponents needed