Holtek Semiconductor HT82M23B
HT82M23A is pin compatible with HT82M22A · HT82M23B/HT82M23C is pin compatible with (optomechanical and mechanical) · 3 key or 5 key mode can be selected by package · Complete Universal Serial Bus specs V2.0 compatibility · Serial Bus Interface Engine (SIE) HT82M21A · HT82M23A: 20-pin DIP/SOP package · USB transceiver · Single chip solution especially for USB mouse HT82M23B/HT82M23C: 18-pin DIP/SOP package function General Description HT82M23A/HT82M23B/HT82M23C is a Plug and Play Windows 2000 and 5-button 3D USB+PS/2 Mouse controller. The HT82M23A/HT82M23B/HT82M23C can support the USB Standard Request as well as HID Class Request version 1.1. It is compatible with Microsoft Intelli 3D or Windows 2000 5 key PS/2 mouse.