PT8A9781
Features
- PT8A977B works as encoder and PT8A9781 works as decoder
- Four control functions
- Operating power-supply voltage: 1.8V to 5.0V(977B) 1.0V to 1.5V (9781)
- Auto-power-off and oscillation-off if no press on any button (977B)
- Press on any button to wake up (977B)
- On-chip oscillator with an external resistor (977B)
- On-chip oscillator with an external resistor and capacitor (9781)
- On-chip amplifiers (9781)
- Low operating current
- Few external ponents needed
General Description
The PT8A977B and PT8A9781 provide a plete control functions to the remote-controlled toy. The PT8A9781 has four output pins corresponding with the four actions i.e, forward, backward, right, left. 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. There is an internal oscillator in the PT8A9781. By adding an external resistor and...
