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SN54HCT257FK PDF预览

SN54HCT257FK

更新时间: 2024-11-26 23:03:03
品牌 Logo 应用领域
德州仪器 - TI 解复用器逻辑集成电路输出元件
页数 文件大小 规格书
6页 113K
描述
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS

SN54HCT257FK 技术参数

生命周期:Obsolete零件包装代码:QFN
包装说明:CERAMIC, CC-20针数:20
Reach Compliance Code:unknownHTS代码:8542.39.00.01
风险等级:5.84Is Samacsys:N
系列:HCTJESD-30 代码:S-CQCC-N20
长度:8.89 mm负载电容(CL):150 pF
逻辑集成电路类型:MULTIPLEXER功能数量:4
输入次数:2输出次数:1
端子数量:20最高工作温度:125 °C
最低工作温度:-55 °C输出特性:3-STATE
输出极性:TRUE封装主体材料:CERAMIC, METAL-SEALED COFIRED
封装代码:QCCN封装形状:SQUARE
封装形式:CHIP CARRIER传播延迟(tpd):57 ns
认证状态:Not Qualified座面最大高度:2.03 mm
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:CMOS温度等级:MILITARY
端子形式:NO LEAD端子节距:1.27 mm
端子位置:QUAD宽度:8.89 mm
Base Number Matches:1

SN54HCT257FK 数据手册

 浏览型号SN54HCT257FK的Datasheet PDF文件第2页浏览型号SN54HCT257FK的Datasheet PDF文件第3页浏览型号SN54HCT257FK的Datasheet PDF文件第4页浏览型号SN54HCT257FK的Datasheet PDF文件第5页浏览型号SN54HCT257FK的Datasheet PDF文件第6页 
SN54HCT257, SN74HCT257  
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS  
WITH 3-STATE OUTPUTS  
SCLS072B – NOVEMBER 1988 – REVISED MAY 1997  
SN54HCT257 . . . J PACKAGE  
SN74HCT257 . . . N PACKAGE  
(TOP VIEW)  
Inputs Are TTL-Voltage Compatible  
Provide Bus Interface From Multiple  
Sources in High-Performance Systems  
High-Current 3-State Outputs Interface  
Directly With System Bus  
A/B  
1A  
V
CC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
OE  
4A  
4B  
1B  
Buffered Inputs and Outputs  
1Y  
Package Options Include Ceramic Chip  
Carriers (FK) and Standard Plastic (N) and  
Ceramic (J) 300-mil DIPs  
2A  
12 4Y  
11  
10  
9
2B  
3A  
3B  
3Y  
2Y  
GND  
description  
The ’HCT257 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.  
SN54HCT257 . . . FK PACKAGE  
(TOP VIEW)  
3
2
1
20 19  
18  
The SN54HCT257 is characterized for operation  
over the full military temperature range of –55°C  
to 125°C. The SN74HCT257 is characterized for  
operation from –40°C to 85°C.  
4A  
4B  
NC  
1B  
1Y  
NC  
2A  
2B  
4
5
6
7
8
17  
16  
15 4Y  
14  
9 10 11 12 13  
3A  
FUNCTION TABLE  
INPUTS  
OUTPUT  
DATA  
SELECT  
A/B  
Y
OE  
A
X
L
B
X
X
X
L
NC – No internal connection  
H
L
L
L
L
X
L
Z
L
L
H
X
X
H
L
H
H
H
H
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 1997, Texas Instruments Incorporated  
UNLESS OTHERWISE NOTED this document contains PRODUCTION  
DATA information 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.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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