CD54HC257 Overview
The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a mon Select Input (S). The Output Enable input (OE) is active LOW. When OE is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regardless of all other input conditions.
CD54HC257 Key Features
- Buffered Inputs
- Typical Propagation Delay ( In to Output ) = 12ns at VCC = 5V, CL = 15pF, TA = 25oC
- Fanout (Over Temperature Range)
- Standard Outputs
- 10 LSTTL Loads
- Bus Driver Outputs
- 15 LSTTL Loads
- Wide Operating Temperature Range . . . -55oC to 125oC
- Balanced Propagation Delay and Transition Times
- Significant Power Reduction pared to LSTTL Logic ICs