Product Summary

The VT82C42N is a compatible direct replacement for the Intel 80C42 BIOS version of the Keyboard Controller. The VT82C42N is fully implemented by hardware logic so that it has a very fast response capability for any command issued by the host. In addition to keyboard support, the VT82C42N also offers PS/2 mouse support. The VT82C42N also offers the Mouse Lock function (patent pending), a feature exclusively designed by VIA technologies, which locks the mouse when the keylock function is initiated.

Features

VT82C42N features: (1)Fully hardware implemented, 0.8μm CMOS Technology.; (2)Very high speed response of A20 GATE & reset.; (3) Support PS2 style mouse.; (4)Compatible with all major BIOS, including AWARD, PHOENIX and AMI; (5)40 pin PDIP and 44 pin PLCC packages.

Diagrams

VT82C42N Block Diagram

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VT8225

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Data Sheet

Negotiable 
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VT8231

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Data Sheet

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VT82885

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Data Sheet

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Data Sheet

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Data Sheet

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Data Sheet

Negotiable