CY74FCT257T

更新时间： 2024-11-21 05:28:31

品牌	Logo	应用领域
德州仪器 - TI		复用器输出元件输入元件
页数	文件大小	规格书
12页	330K
描述
QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS

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CY74FCT257T 数据手册

CY74FCT257T

QUAD 2-INPUT MULTIPLEXER

WITH 3-STATE OUTPUTS

SCCS019D – MAY 1994 – REVISED NOVEMBER 2001

Q OR SO PACKAGE

(TOP VIEW)

Function, Pinout, and Drive Compatible

With FCT and F Logic

Reduced V

Equivalent FCT Functions

(Typically = 3.3 V) Version of

Edge-Rate Control Circuitry for

Significantly Improved Noise

Characteristics

Supports Partial-Power-Down Mode

off

Operation

GND

Matched Rise and Fall Times

Fully Compatible With TTL Input and

Output Logic Levels

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

64-mA Output Sink Current

32-mA Output Source Current

3-State Outputs

description

The CY74FCT257T has four identical two-input multiplexers that select four bits of data from two sources under

the control of a common data-select (S) input. The I inputs are selected when S is low, and the I inputs are

selected when S is high. Data at the output is noninverted.

TheCY74FCT257Tisalogicimplementationofafour-pole, two-positionswitch, wherethepositionoftheswitch

is determined by the logic levels at S. Outputs are in the high-impedance state when the output-enable (OE)

input is high.

All but one device must be in the high-impedance state to avoid currents exceeding the maximum ratings if

outputs are tied together. OE inputs must ensure that there is no overlap when outputs of 3-state devices are

tied together.

This device is fully specified for partial-power-down applications using I . The I circuitry disables the outputs,

off

preventing damaging current backflow through the device when it is powered down.

PIN DESCRIPTION

NAME

DESCRIPTION

Data inputs

Common data-select input

Output-enable input (active low)

Data outputs

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...12

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与CY74FCT257T相关器件

型号	品牌	获取价格	描述	数据表
CY74FCT257TPC	CYPRESS	获取价格	Multiplexer, FCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDIP16, 0
CY74FCT257TQC	TI	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
CY74FCT257TQCT	TI	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
CY74FCT257TQCTE4	TI	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
CY74FCT257TQSOP	TI	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
CY74FCT257TSOC	CYPRESS	获取价格	Multiplexer, FCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, 0
CY74FCT257TSOIC	TI	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
CY74FCT2646ATQCT	TI	获取价格	8-Bit Registered Transceiver
CY74FCT2646ATSOCR	CYPRESS	获取价格	Registered Bus Transceiver, FCT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.300 IN
CY74FCT2646CTQCT	TI	获取价格	8-Bit Registered Transceiver

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