General Description

The PT8A9701 and PT8A973/973L is a pair of CMOS LSIs designed for remote controlled toy car application. They have seven control keys for controlling the corresponding motion (forward, backward, left, right, turbo and 2 functional keys) of the remote controlled car. They also have ‘Forward (Backward)’ and ‘Turbo’ combination application.

Features

• The PT8A9701 works as the encoder and the PT8A973/973L works as the decoder

• Seven output pins, 5 for forward, backward, left, right and turbo functions, and 2 functional keys

• Operation power supply for PT8A9701: 3V to 12V (with series resistor)

• Auto power-off if no key pressed (PT8A9701)

• Motor current limit to meet toy safety standard HD271 (PT8A973/973L)

• Low operating current

• On-chip oscillator with an external resistor

• On-chip reversing amplifiers

• Built-in 3.7V Zener (Vz) (PT8A973) and 3.1V Zener (Vz) (PT8A973L)

• Few external components needed

• Pin to pin compatible with TX6/RX6