Product Overview MC74HC251A: 8-Input Multiplexer (3-state) For complete documentation, see the data sheet Product Description The MC54/74HC251 is identical in pinout to the LS251. The deviceinputs 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 A High Noise Immunity Characteristic of CMOS Devices These are PbFree Devices Applications • Desktop Part Electrical Specifications Product Compliance Status Channels VCC Min (V) VCC Max (V) tpd Max (ns) IO Max (mA) Package Type MC74HC251ADG Pb-free Active 1 2 6 48 5.2 SOIC-16 Active 1 2 6 48 5.2 SOIC-16 Active 1 2 6 48 5.2 TSSOP-16 Active 1 2 6 48 5.2 TSSOP-16 Active 1 2 6 48 5.2 SOIC-16 Halide free MC74HC251ADR2G Pb-free Halide free MC74HC251ADTG Pb-free Halide free MC74HC251ADTR2G Pb-free Halide free NLV74HC251ADR2G AEC Qualified PPAP Capable Pb-free Halide free For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016