The CD74HC157 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select input (S). The Enable input (E\) is active Low. When (E\) is High, all of the outputs (1Y\-4Y\) are forced Low, regardless of all other input conditions. Moving data from two groups of registers to four common output busses is a common use of these devices. The state of the Select input determines the particular register from which the data comes. They can also be used as function generators.

Features:
Common Select Inputs
Separate Enable Inputs
Buffered inputs and Outputs
Wide Operating Temperature Range . . . -55?C to 125?C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
2V to 6V Operation
High Noise Immunity: NIL = 30%, NIH = 30%of VCC at VCC = 5V

Datasheet Available: Texas Instruments CD74HC157

SOIC 16 package. Manufactured by Texas Instruments.
A20279S