UTC UT84520

CMOS IC

QW-R502-004,A

PS/2 SCROLLING MOUSE CONTROLLER

DESCRIPTION

The UT84520 Scrolling Mouse Controller is specially

designed to control PS/2 mouse device．This single chip can

interface with three key-switches and 4X-Y photo-couples plus

Z-axis directly to 8042 controller．

There are four types of Z-axis inputs used to implement

scrolling mouse functionality．

FEATURES

*Using 50KΩ+5% resistor for RC oscillation．

*Compatible with legacy PS/2 mouse．

*Compatible with Microsoft PS/2 scrolling mouse．

*Built-in noise immunity circuit．

*The sampling rate of motion detector is up to 65KHz．

*Built-in three step dynamic input impedance．

*Three key-switches and four photo-couples inputs．

*Photo couple test mode included﹒

*Low power dissipation．

*Two types Z direction input:

1.Photo couples input

2.Mechanical input

DIP-16