74HC/HCT257 Quad 2-input Multiplexer; 3-state

The 74HC257 74HCT257 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL).The 74HC257 74HCT257 has four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (S).The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and the data inputs from source 1 (1I1 to 4I1) are selected when S is HIGH. Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs.The 74HC257 74HCT257 is the Logic implementation of a 4-pole, 2-position Switch where the position of the Switch is determined by the Logic levels applied to S. The outputs are forced to a high-impedance OFF-state when OE is HIGH.The Logic equations for the outputs are:1Y = OE x (1I1 x S + 1I0 x S) 2Y = OE x (2I1 x S + 2I0 x S) 3Y = OE x (3I1 x S + 3I0 x S) 4Y = OE x (4I1 x S + 4I0 x S)The 74HC257 74HCT257 is identical to the 74HC258 but has non-inverting (true) outputs.
By NXP Semiconductors
Part Manufacturer Description Datasheet Samples
SN74HC257PWTG4 Rochester Electronics LLC Multiplexer, HC/UH Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, GREEN, PLASTIC, TSSOP-16
CD74HC257EE4 Rochester Electronics LLC Multiplexer, HC/UH Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDIP16, ROHS COMPLIANT, PLASTIC, DIP-16
SN74HC257J4 Rochester Electronics LLC Multiplexer
SN74HC257NP1 Rochester Electronics LLC Multiplexer
SN74HC257J Rochester Electronics LLC Multiplexer
SN74HC257DW3 Rochester Electronics LLC Multiplexer
SN74HC257PWRE4 Rochester Electronics LLC Multiplexer, HC/UH Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, GREEN, PLASTIC, TSSOP-16
SN74HC257DTE4 Rochester Electronics LLC Multiplexer, HC/UH Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, GREEN, PLASTIC, SOIC-16
SN74HC257PWG4 Rochester Electronics LLC Multiplexer, HC/UH Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, GREEN, PLASTIC, TSSOP-16
SN74HC257D3 Rochester Electronics LLC Multiplexer
74HC257 's Packages74HC257 's pdf datasheet
74HC257D SO
74HC257DB SSOP
74HC257N DIP
74HC257PW TSSOP
74HCT257D SO
74HCT257DB SSOP
74HCT257N DIP
74HCT257PW TSSOP




74HC257 Pinout, Pinouts
74HC257 pinout,Pin out
This is one package pinout of 74HC257,If you need more pinouts please download 74HC257's pdf datasheet.

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