Description
The HT8A977B and HT8A978B provide complete control functions to the remote-controlled toy. The HT8A977B has five input pins corresponding with the five function buttons i.e, forward, backward, rightward, leftward and turbo. The encoding circuit in the HT8A977B 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.

FEATURES
 HT8A977B works as encoder and HT8A978B works as decoder
 Five pins for five control functions
 Operating power-supply voltage: 2.5V to 5.0V (978B), 1.8V to 5.0V(977B)
 Auto-power-off and oscillation-off if no press on any button (977B)
 Press on any button to wake up (977B)
 One output pin used for external power control (977B)
 On-chip oscillator with an external resistor
 On-chip reversing amplifiers (978B)
 Low operating current
 Few external components needed
 Package: 14-pin DIP, 14-pin SOIC, 16-pin DIP, 16-pin SOIC, die form and wafer form