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74AC257

STMicroelectronics
Part Number 74AC257
Manufacturer STMicroelectronics
Description QUAD 2 CHANNEL MULTIPLEXER
Published Apr 3, 2005
Detailed Description 74AC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE) s s s s s s These IC’s are composed of an independent 2 channel multip...
Datasheet PDF File 74AC257 PDF File

74AC257
74AC257

Overview
74AC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE) s s s s s s These IC’s are composed of an independent 2 channel multiplexer with common SELECT and ENABLE INPUT.
s The AC257 is a non inverting multiplexer.
When the ENABLE INPUT is held ”High”, outputs s of both IC’s become high impedance state.
If SELECT INPUT is held ”Low”, ”A” data is DESCRIPTION selected, when SELECT INPUT is ”High”, ”B” The AC257 is an advanced high-speed CMOS www.
DataSheet4U.
com data is chosen.
QUAD 2 CHANNEL MULTIPLEXER (3-STATE) All inputs and outputs are equipped with fabricated with sub-micron silicon gate and 2 protection circuits against static discharge, giving double-layer metal wiring C MOS technology.
them 2KV ESD immunity and transient excess It is ideal for low power applications mantaining voltage.
high speed operation similar to equivalent Bipolar Schottky TTL.
s HIGH SPEED: tPD =4.
5 ns (TYP.
) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 µA (MAX.
) at TA = 25 oC HIGH NOISE IMMUNITY: VNIH = VNIL = 28% ...


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