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SN74HCT257DG4

更新时间： 2024-11-06 02:58:43
品牌 Logo 应用领域
德州仪器 - TI 输出元件
页数 文件大小 规格书
9页 272K
描述
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS

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SN74HCT257DG4 数据手册

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ꢙ ꢓꢆ ꢄ ꢚ ꢒꢀꢆꢌꢆ ꢑ ꢔ ꢋꢆ ꢏ ꢋꢆ  
SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003  
D
D
D
D
D
Operating Voltage Range of 4.5 V to 5.5 V  
D
D
D
D
Low Input Current of 1 µA Max  
Inputs Are TTL-Voltage Compatible  
High-Current 3-State Outputs Interface  
Directly With System Bus  
Provide Bus Interface From Multiple  
Sources in High-Performance Systems  
Typical t = 17 ns  
pd  
Low Power Consumption, 80-µA Max I  
Buffered Inputs and Outputs  
CC  
6-mA Output Drive at 5 V  
SN54HCT257 . . . FK PACKAGE  
(TOP VIEW)  
SN54HCT257 . . . J PACKAGE  
SN74HCT257 . . . D OR N PACKAGE  
(TOP VIEW)  
A/B  
1A  
V
CC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
3
2
1
20 19  
18  
OE  
4A  
4B  
4A  
4B  
NC  
1B  
1Y  
NC  
2A  
2B  
4
5
6
7
8
1B  
17  
16  
1Y  
2A  
12 4Y  
15 4Y  
14  
9 10 11 12 13  
11  
10  
9
2B  
3A  
3B  
3Y  
3A  
2Y  
GND  
NC − No internal connection  
description/ordering information  
The ’HCT257 devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in  
bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at  
the high logic level.  
To ensure the high-impedance state during power up or power down, OE should be tied to V  
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.  
through a pullup  
CC  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
PACKAGE  
T
A
PDIP − N  
SOIC − D  
Tube of 25  
Tube of 40  
Reel of 2500  
Reel of 250  
Tube of 25  
Tube of 55  
SN74HCT257N  
SN74HCT257D  
SN74HCT257DR  
SN74HCT257DT  
SNJ54HCT257J  
SNJ54HCT257FK  
SN74HCT257N  
−40°C to 85°C  
HCT257  
CDIP − J  
SNJ54HCT257J  
−55°C to 125°C  
LCCC − FK  
SNJ54HCT257FK  
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are  
available at www.ti.com/sc/package.  
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.  
Copyright 2003, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...9

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SN74HCT257DG4 替代型号

型号 品牌 替代类型 描述 数据表
SN74HCT257DR TI

完全替代

 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/ MULTIPLEXERS WITH 3 STATE OUTPUTS
SN74HCT257D TI

完全替代

 QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/ MULTIPLEXERS WITH 3 STATE OUTPUTS

与SN74HCT257DG4相关器件

型号 品牌 获取价格 描述 数据表
SN74HCT257DR TI

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 		QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/ MULTIPLEXERS WITH 3 STATE OUTPUTS
SN74HCT257DRE4 TI

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 		QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS
SN74HCT257DRG4 ROCHESTER

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 		Multiplexer, HCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, G
SN74HCT257DT TI

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 		QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/ MULTIPLEXERS WITH 3 STATE OUTPUTS
SN74HCT257DTE4 TI

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 		QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS
SN74HCT257DTE4 ROCHESTER

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 		Multiplexer, HCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, G
SN74HCT257DTG4 TI

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 		HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, GREEN, PLASTIC, SOIC-1
SN74HCT257DTG4 ROCHESTER

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 		Multiplexer, HCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, G
SN74HCT257N TI

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 		QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS
SN74HCT257NE4 TI

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 		QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS

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