Buy MM74C923N FAIRCHILD/NS , Learn more about MM74C923N 20 KEY KEYBOARD ENCODER, Logic Type:Key Encoder, No. of Outputs:4, Supply Voltage Min:3V, Supply Voltage Max:15V, Operating Temperature Min:-40 C, Operating Temperature Max:85 C, View the manufacturer, and stock, and datasheet pdf for the MM74C923N at Jotrin Electronics.