MC74HC251ADG

8-Input Data Selector/Multiplexer with 3-State OutputsHigh−Performance Silicon−Gate CMOS
The MC54/74HC251 is identical in pinout to the LS251.
The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.This device selects one of the eight binary Data Inputs, as determined by the Address Inputs.
The Output Enable pin must be a low level for the selected data to appear at the outputs. If Output Enable is high, both the Y and the Y outputs are in the high−impedance state. This 3−state feature allows the HC251 to be used in bus−oriented systems.
The HC251 is similar in function to the HC251 which does not have 3−state outputs.
Features
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2 to 6 V
• Low Input Current: 1 μA
• High Noise Immunity Characteristic of CMOS Devices
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These are Pb−Free Devices