The DG509AAK/883B from Analog Devices Inc./Maxim Integrated is a monolithic CMOS analog multiplexer ..
Buck Switching Regulator IC Positive Fixed 5V 1 Output 300mA 8-CDIP (0.300", 7.62mm)..
Buck Switching Regulator IC Positive Adjustable (Fixed) 1.31V (5V) 1 Output 8-CDIP (0.300", 7.62mm)..