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Part Number: SC84520

 

 

 

 

Description: The SC84520 Scrolling Mouse Controller id specially designed to control serial mouse or PS/2 mouse dev...


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SC84520 General Description


The SC84520 Scrolling Mouse Controller id specially designed to control serial mouse or PS/2 mouse device. This single chip can interface three key-switched and 4 X-Y photo-couples plus Z-axis directly plus Z-axis directly to RS-232C or 8042 controller.

There are four types Z-axis inputs used to implement scrolling mouse functionality.

SC84520 Maximum Ratings

         Characteristic

Symbol

Value

Unit

Supply Voltage

VSS

-0.3 ~ +7.5

V

Temperature Under Bias

 

0~70

Storage Temperature range

TOPR

-65 ~ +150

 

Operating Dissipation

PD

500

mW

SC84520 Features

*Using 50k ± 1% resistor for RC oscillation
*Compatible with legacy PS/2 mouse
*Compatible with Microsoft serial scrolling mouse
*Compatible with Microsoft PS/2 scrolling mouse
*Serial or PS/2 port auto-detect
*100 bytes PnP ID code could be filled by code layer
*Built-in noise immunity circuit
*The sampling rate of motion detector is up to 65 kHz
*Built-in three zener diodes : one in VDD to VSS, two in RTS to VDD
*CMOS push-pull RXD output
*Built-in current comparator for photo-couples input
*Built-in three step dynamic input impedance
*Three key-switches and four photo-coupled inputs
*RTS debouncing circuit include
*Photo couple test mode include
*Low power dissipation
*Six types Z direction input:
1. Photo couples input (Z/1)
2. Key-switches input
3. Voltage-sensing input
4. Mechanical input(Z/1)
5. Photo couples input (Z/4)
6. Mechanical input (Z/2)
*Package type: SC84510AP: 16DIP, Photo coupled input(Z/1) SC84510BP: 16DIP, Key-switches input SC84510CP: 16DIP, Voltage-sensing Input
  SC84510DP: 16DIP, Mechanical input (Z/1) SC84510EP: 16DIP, Photo couples input (Z/4) SC84510FP: 16DIP, Mechanical input (Z/2)

SC84520 Typical Application

*Serial PnP scrolling mouse
*PS/2 scrolling mouse
*Combo PnP scrolling mouse

SC84520 Connection Diagram

SC84520  Connection Diagram

SC84520 datasheet

SC84520
PDF/DataSheet Download

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