(PT8A972 - PT8A974) 8-Direction Remote Controller - Pericom Technology
Description
Data Sheet PT8A9702/973/973L/974/974L 8-Direction Remote Controller
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Features
• The PT8A9702 works as the encoder and the PT8A973/974/973L/974L works as the decoder • 8-direction control • Operation power supply for PT8A9702: 3V to 12V (with series resistor) • Auto power-off if no key pressed (PT8A9702) • Motor current limit to meet toy safety standard HD271 (PT8A973/974/973L/974L) • Low operating current • On-chip oscillator with an external resistor • On-chip reversing amplifiers • Built-in 3.
8V Zener (9702), 3.
7V Zener (Vz) (973/974) and 3.
1V Zener (Vz) (973L/974L)
• Few external components needed • Pin to pin compatible with TX6/RX6
General Description
The PT8A9702P works as encoder, it can provide 8direction remote control for toy car application with PT8A973/973L/PT8A974/974L together.
Input 8direction named F, FL, L, BL, BR, R, FR, and B they are combined with F, L, B, and R four signals.
In decoder side, use output signal Left & Right to drive Right Motor, and use For & Back to drive Left Motor.
Their detail relations please see truth table.
Ordering Information
Device Na me Part No.
Package E n cod er PT8A9702P 16-pin PDIP PT8A973P PT8A973LP Decod er PT8A974P PT8A974LP 20-pin PDIP
18-pin PDIP
Block Diagram
Block Diagram of PT8A9702
f0/2 OSCI OSCO f0
Oscillator
Timing Generator
SC
MUX
SO
m o c .
u 4 t e e h s a t a .
d w w w
Forward Backward Left Right F1 F2 F3/F4
PT0097(11/02)
Latch Circuit
Logic Control
PC
VCC
Counters
1
Ver:2
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Data Sheet PT8A9702/973/973L/974/974L 8-Direction Remote Controller
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