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Similar Part No. - 74ALS257DB

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	74ALS251	103Kb / 8P	8-input multiplexer 3-State 1991 Feb 08
	74ALS251D	103Kb / 8P	8-input multiplexer 3-State 1991 Feb 08
	74ALS251N	103Kb / 8P	8-input multiplexer 3-State 1991 Feb 08
	74ALS253	115Kb / 9P	Dual 4-input multiplexer 3-State 1991 Feb 08
	74ALS253D	115Kb / 9P	Dual 4-input multiplexer 3-State 1991 Feb 08

Manufacturer	Part #	Datasheet	Description
National Semiconductor ...	54LS151	140Kb / 6P	Data Selector/Multiplexer
NXP Semiconductors	74ALS157	109Kb / 9P	Data selector/multiplexer 1991 Feb 08
System Logic Semiconduc...	SL74HC151	57Kb / 5P	8-Input Data Selector/Multiplexer
Fairchild Semiconductor	DM74LS253	56Kb / 6P	3-STATE Data Selector/Multiplexer
Integral Corp.	IN74ACT151	194Kb / 5P	8-INPUT DATA SELECTOR/MULTIPLEXER
Integral Corp.	IN74HC151	160Kb / 5P	8-INPUT DATA SELECTOR/MULTIPLEXER
Motorola, Inc	MC74HC151	91Kb / 6P	8-INPUT DATA SELECTOR / MULTIPLEXER
Motorola, Inc	MC74HC153	180Kb / 5P	Dual 4-Input Data Selector/Multiplexer
ON Semiconductor	MC74HC251ADG	146Kb / 9P	8-Input Data Selector Multiplexer with January, 2010 ??Rev. 0
ON Semiconductor	MC74HC151A	97Kb / 7P	8-Input Data Selector/Multiplexer June, 2015 ??Rev. 3