TY Semiconductor

HT8A977B works as encoder and HT8A978B works as decoder

Holtek Semiconductor

3/5-Key USB+PS/2 Optical Mouse Controller

Holtek Semiconductor

3/5-Key USB Vista Tilt Optical Mouse Controller

Holtek Semiconductor

3/5-Key 3D PS/2 Optical Mouse Controller

Holtek Semiconductor

USB Multimedia Keyboard Encoder 8-Bit MCU

Holtek Semiconductor

CCD 4 Channel Vertical Driver

Holtek Semiconductor

16-Bit CCD/CIS Analog Signal Processor

Holtek Semiconductor

60mA Audio Power Amp

Holtek Semiconductor

USB Multimedia Keyboard Encoder 8-Bit MCU

Holtek Semiconductor

24-Bit Stereo Audio D/A Converter

Holtek Semiconductor

USB Multimedia Keyboard Encoder 8-Bit OTP MCU

Holtek Semiconductor

3/5-Key USB+PS/2 Optical Mouse Controller

Holtek Semiconductor

Multimedia Keyboard Encoder 8-Bit Mask MCU

Holtek Semiconductor

3/5-Key USB+PS/2 Optical Mouse Controller