Datasheet > M74HCT257

M74HCT257

更新时间： 2024-11-18 23:01:27

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
12页	258K
描述
HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVERTING

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中文翻译

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M74HCT257 数据手册

M54/M74HCT257

M54/M74HCT258

HCT257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

HCT258 QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING)

HIGH SPEED

t_PD= 16 ns (TYP.) at V_CC= 5 V

LOW POWER DISSIPATION

I_CC= 4 µA (MAX.) at T_A= 25 °C

COMPATIBLE WITH TTL OUTPUTS

V_IH= 2V (MIN.) V_IL= 0.8V (MAX)

OUTPUT DRIVE CAPABILITY

15 LSTTL LOADS

SYMMETRICAL OUTPUT IMPEDANCE

IOH = I_OL= 6 mA (MIN.)

BALANCED PROPAGATION DELAYS

t_PLH= t_PHL

PIN AND FUNCTION COMPATIBLE

B1R

F1R

(Plastic Package)

(Ceramic Package)

M1R

C1R

(Micro Package)

(Chip Carrier)

WITH 54/74LS257/258

ORDER CODES :

M54HCTXXXF1R

M74HCTXXXM1R

M74HCTXXXB1R

M74HCTXXXC1R

PIN CONNECTIONS (top view)

HCT257

DESCRIPTION

The M54/74HCT257 and the M54/74HCT258 are

high speed CMOS MULTIPLEXERs fabricated with

silicon gate C²MOS technology.

They have the same high speed performance of

LSTTL combined with true CMOS low power con-

sumption.

These IC’s are composed of an independent 2-

channelmultiplexer with commonSELECT and EN-

ABLE INPUT.

The M54/74HCT258 is an inverting multiplexer

while the M54/74HCT257 is a non-inverting multi-

plexer. When the ENABLE INPUT is held ”High”,

outputs of both IC’s become high-impedance state.

If SELECTINPUTis held”Low”, ”A” datais selected,

when SELECT INPUT is high ”H”, ”B” data is

chosen.

HCT258

All inputs are equipped with protection circuits

against static discharge and transient excess volt-

age.

This integrated circuit has input and output charac-

teristics that are fully compatible with 54/74 LSTTL

logic families. M54/74HCT devices are designed to

directly interface HSC²MOS systems with TTL and

NMOS components. They are also plug in replace-

February 1993

1/12

12 3 4 5 6 7...12

中文翻译

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与M74HCT257相关器件

型号	品牌	获取价格	描述	数据表
M74HCT257B1R	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT257C1R	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT257M1R	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT257TTR	STMICROELECTRONICS	获取价格	HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, TSSOP-16
M74HCT258	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT258B1R	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT258C1R	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT258M1R	STMICROELECTRONICS	获取价格	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVER
M74HCT258RM13TR	STMICROELECTRONICS	获取价格	HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDSO16, SOP-16
M74HCT258TTR	STMICROELECTRONICS	获取价格	HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDSO16, TSSOP-16

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