74AC257

更新时间： 2024-09-26 22:53:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		复用器
页数	文件大小	规格书
10页	91K
描述
QUAD 2 CHANNEL MULTIPLEXER 3-STATE

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中文翻译

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数据手册

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74AC257 数据手册

74AC257

QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

■

HIGH SPEED: t_PD=4.5 ns (TYP.) at V_CC= 5V

LOW POWER DISSIPATION:

I_CC=8 µA (MAX.) at T_A=25 ^oC

HIGH NOISE IMMUNITY:

■

V_NIH= V_NIL= 28% V_CC(MIN.)

50Ω TRANSMISSION LINE DRIVING

CAPABILITY

SYMMETRICAL OUTPUT IMPEDANCE:

|I_OH| = I_OL= 24 mA (MIN)

BALANCED PROPAGATION DELAYS:

t_PLHt_PHL

OPERATING VOLTAGE RANGE:

(Plastic Package)

(Micro Package)

ORDER CODES :

74AC257B

These IC’s are composed of an independent 2

channel multiplexer with common SELECT and

ENABLE INPUT.

V_CC(OPR) = 2V to 6V

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 257

IMPROVED LATCH-UP IMMUNITY

The AC257 is a non inverting multiplexer.

When the ENABLE INPUT is held ”High”, outputs

of both IC’s become high impedance state. If

SELECT INPUT is held ”Low”, ”A” data is

selected, when SELECT INPUT is ”High”, ”B”

data is chosen.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

DESCRIPTION

The AC257 is an advanced high-speed CMOS

QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

fabricated with sub-micron silicon gate and

double-layer metal wiring C²MOS technology.

It is ideal for low power applications mantaining

high speed operation similar to equivalent Bipolar

Schottky TTL.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/10

April 1997

12 3 4 5 6 7...10

中文翻译

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与74AC257相关器件

型号	品牌	获取价格	描述	数据表
74AC257B	STMICROELECTRONICS	获取价格	QUAD 2 CHANNEL MULTIPLEXER 3-STATE
74AC257DCQR	FAIRCHILD	获取价格	暂无描述
74AC257FC	NSC	获取价格	AC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CDFP16, CERAMIC, FP-16
74AC257FCX	FAIRCHILD	获取价格	Multiplexer, AC Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CDFP16, CE
74AC257LCQR	FAIRCHILD	获取价格	Multiplexer, AC Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CQCC20, CE
74AC257LCTR	FAIRCHILD	获取价格	Multiplexer, AC Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CQCC20, CE
74AC257LCX	NSC	获取价格	AC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20, CERAMIC, LCC-20
74AC257M	STMICROELECTRONICS	获取价格	QUAD 2 CHANNEL MULTIPLEXER 3-STATE
74AC257MTC	FAIRCHILD	获取价格	Quad 2-Input Multiplexer with 3-STATE Outputs
74AC257MTCX	FAIRCHILD	获取价格	2-Input Digital Multiplexer