Part Number : MC74HC157A
Function : Quad 2-Input Data Selectors / Multiplexers
Package : DIP, SOIP 16 Pin Type
Maker : ON Semiconductor
Pinouts : 
Description :
The MC74HC157A is identical in pinout to the LS157. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
This device routes 2 nibbles (A or B) to a single port (Y) as determined by the Select input. The data is presented at the outputs in noninverted form. A high level on the Output Enable input sets all four Y outputs to a low level.
Features
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 A
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard No. 7A
• Chip Complexity: 82 FETs or 20.5 Equivalent Gates
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
Datasheet PDF Download : 
Others datasheet of same file :
MC74HC157, MC74HC157ADG, MC74HC157ADR2G,
MC74HC157ADTR2G, MC74HC157ANG