The CD74HCT253E is a dual 4-to-1 line selector/multiplexer having three-state outputs. One of four sources for each section is selected by the common select inputs, S0 and S1. When the output enable (1OE, 2OE) is HIGH, the output is in the high-impedance state.
Common Select Inputs
Separate Output-Enable Inputs
Wide Operating Temperature Range . . . -55°C to 125°C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
16 pin DIP. Manufactured by Harris. Actual brand may vary from picture.