This part is a kind of semiconductor called MX8732.

Function of this product has USB/PS2 Single Chip Optical Mouse Sensor.

Manufacturers : LIZE Electronic

Image and pinout :

Some of the text within the PDF file :

Shenzhen LIZE Electronic Technology Co., Ltd SPECIFICATION 732 MX8 MX8732 USB/PS2 Single Chip Optical Mouse Sensor VERSION 1.0 Tel:86-755-8835 3502/03/04 Website:http://www.lizhiic.com Fax:86-755-8835 3509 732 MX8 MX8732 U+P Single Chip Optical Mouse Sensor TABLE OF CONTENTS 1. General Description. 3 2. Features.. 3 3. Pin Assignment.4 4. Absolute Maximum Rating.. [ ... ]

MX8732 PDF Datasheet Download