Manufacturer	Part Number	Description
Chengdu Sino Microelectronics System	HWD803	3-Pin Microprocessor Reset Circuits
Chengdu Sino Microelectronics System	HWD4863	Dual Audio Amplifier
Chengdu Sino Microelectronics System	HWD809	3-pin microprocessor power monitoring
Chengdu Sino Microelectronics System	HWD810	3-Pin Microprocessor Reset Circuits
Chengdu Sino Microelectronics System	HWD4558	Dual Operational Amplifiers
Chengdu Sino Microelectronics System	HWD809	3-Pin Microprocessor Reset Circuits