... board: Key button<15, touch key<15Main IC model: HT-HW09A-16PINTouch IC model: HW-CM1-DIP20<8 key button, can't ... , 4108-8P-40S, 4108-8P-80SLCD IC Model: 1621-SOP48, 1621-SOP28 The digital driver IC Model: 1628, 1629, 1638, 1668, 1637 Power ...