74ACT257

更新时间： 2024-11-10 22:56:15

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	90K
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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74ACT257 数据手册

74ACT257

QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

■

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

LOW POWER DISSIPATION:

I_CC=8 µA (MAX.) at T_A=25 ^oC

COMPATIBLE WITH TTL OUTPUTS

■

_IH= 2V (MIN), V = 0.8V (MAX)

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 :

74ACT257B

74ACT257M

ENABLE INPUT.

The AC257 is a non inverting multiplexer.

V_CC(OPR) = 4.5V to 5.5V

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 closen.

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 257

IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The device is designed to interface directly High

Speed CMOS systems with TTL, NMOS and

CMOS output voltage levels.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

The ACT257 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.

These IC’s are composed of an independent 2

channel multiplexer with common SELECT and

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74ACT257相关器件

型号	品牌	获取价格	描述	数据表
74ACT257_01	STMICROELECTRONICS	获取价格	QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
74ACT257B	STMICROELECTRONICS	获取价格	QUAD 2 CHANNEL MULTIPLEXER 3-STATE
74ACT257FC	FAIRCHILD	获取价格	Multiplexer, ACT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CDFP16, C
74ACT257FCTR	FAIRCHILD	获取价格	Multiplexer, ACT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CDFP16, C
74ACT257FCX	FAIRCHILD	获取价格	Multiplexer, ACT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CDFP16, C
74ACT257FCXR	FAIRCHILD	获取价格	Multiplexer, ACT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CDFP16, C
74ACT257LC	NSC	获取价格	IC ACT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20, CERAMIC, LCC-20, Mu
74ACT257LCX	NSC	获取价格	IC ACT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20, CERAMIC, LCC-20, Mu
74ACT257M	STMICROELECTRONICS	获取价格	QUAD 2 CHANNEL MULTIPLEXER 3-STATE
74ACT257MTC	FAIRCHILD	获取价格	Quad 2-Input Multiplexer with 3-STATE Outputs