Document
A2639B USB+PS/2 Optical Mouse Sensor SOC
CONTENTS
1. DESCRIPTION ........................................................................................................................................................ 2 1.1 2. 3. 4. 5. FEATURES ........................................................................................................................................................... 2
BLOCK DIAGRAM................................................................................................................................................. 3 PIN ASSIGNMENT ................................................................................................................................................. 3 PIN DESCRIPTION ................................................................................................................................................ 4 FUNCTION DEFINITION...................................................................................................................................... 4 5.1 USB & PS/2 PLUG AND PLAY FUNCTION ............................................................................................................ 4 5.1.1. Power-On-Reset function........................................................................................................................... 4 5.1.2. Power-down-set function ........................................................................................................................... 4 5.2 DE-BOUNCE CIRCUITS ......................................................................................................................................... 4 5.3 BUILT-IN REGULATORS ........................................................................................................................................ 5 5.4 NO CRYSTAL FUNCTION ...................................................................................................................................... 6 5.5 EXTERNAL OPTION FOR USB-ONLY OR USB/PS2 IN A2639B ............................................................................. 6 5.6 SUSPEND FUNCTION ............................................................................................................................................ 6 5.6.1. Suspend mode definition ............................................................................................................................ 6
6.
ELECTRICAL CHARACTERISTICS .................................................................................................................. 6 6.1 6.2 6.3 6.4 6.5 6.6 ABSOLUTE MAXIMUM RATINGS.......................................................................................................................... 6 RECOMMENDED OPERATING CONDITIONS .......................................................................................................... 7 AC ELECTRICAL SPECIFICATIONS .......................................................