PT8A978BL Datasheet | Pericom Semiconductor

Features Description - PT8A977B works as encoder and PT8A978B/ 978BL works as decoder - Five pins for five control functions - Operating power-supply voltage: 2.5V to 5.0V (978B), 2.0V to 5.0V (978BL), 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, 978BL) - Low operating current - Few external ponents needed - Package: 14-pin DIP, 14-pin SOIC, 16-pin DIP , 16-pin SOIC, die form and wafer form The PT8A977B and PT8A978B (or 978BL) provide plete control functions to the remote-controlled toy. The PT8A977B has five input pins corresponding with the five function buttons i.e, forward, backward, rightward, leftward and turbo. The encoding circuit in the PT8A977B sends digital codes to the two output pins SO and SC. The digital codes correspond to the definite function buttons or their binations. The SO and SC outputs are used in wireless and infra-red applications respectively. The PT8A978B (or 978BL) 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 remotecontrolled toy. Ordering Information Part No. Pa ck a ge PT8A977BPE Lead free 14-pin DIP PT8A977BWE PT8A977BDE Lead free and Green 14-pin SOIC Die Form PT8A977BUWF Wafer Form PT8A978BPE Lead free 16-pin DIP PT8A978BLWE Lead free and Green 16-pin SOIC PT8A978BDE Die Form PT8A978BUWF Wafer Form Note: Adding E= Pb-free or Pb-free and Green Adding X suffix=Tape/Reel There is an internal oscillator in the PT8A977B and 978B/ 978BL respectively. By adding an external resistor conveniently, the oscillator will be constructed. The oscillator frequency can be adjusted by the external resistor....