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AS240A

更新时间： 2024-11-10 06:37:43
品牌 Logo 应用领域
德州仪器 - TI 驱动器输出元件
页数 文件大小 规格书
21页 592K
描述
OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

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AS240A 数据手册

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SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A  
OCTAL BUFFERS/DRIVERS  
WITH 3-STATE OUTPUTS  
SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002  
SN54ALS240A, SN54AS240A . . . J OR W PACKAGE  
3-State Outputs Drive Bus Lines or Buffer  
Memory Address Registers  
SN74ALS240A . . . DB, DW, N, OR NS PACKAGE  
SN74AS240A . . . DW OR N PACKAGE  
(TOP VIEW)  
pnp Inputs Reduce dc Loading  
description/ordering information  
1OE  
1A1  
2Y4  
1A2  
2Y3  
1A3  
2Y2  
1A4  
2Y1  
GND  
V
CC  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
2OE  
1Y1  
2A4  
1Y2  
2A3  
1Y3  
These octal buffers/drivers are designed  
specifically to improve both the performance and  
density of 3-state memory address drivers, clock  
drivers, and bus-oriented receivers and  
transmitters. When these devices are used with  
the ’ALS241, ’AS241A, ’ALS244, and ’AS244A  
devices, the circuit designer has a choice of  
selected combinations of inverting and  
noninverting outputs, symmetrical active-low  
output-enable (OE) inputs, and complementary  
OE and OE inputs. These devices feature high  
fan-out and improved fan-in.  
13 2A2  
12 1Y4  
11  
2A1  
SN54ALS240A, SN54AS240A . . . FK PACKAGE  
(TOP VIEW)  
The -1 version of SN74ALS240A is identical to the  
standard version, except that the recommended  
3
2
1
20 19  
18  
1Y1  
2A4  
1Y2  
2A3  
1Y3  
1A2  
2Y3  
1A3  
2Y2  
1A4  
maximum I for the -1 version is 48 mA. There is  
4
5
6
7
8
OL  
no -1 version of the SN54ALS240A.  
17  
16  
15  
14  
9 10 11 12 13  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
PACKAGE  
T
A
SN74ALS240AN  
SN74ALS240A-1N  
SN74AS240AN  
SN74ALS240AN  
SN74ALS240A-1N  
SN74AS240AN  
PDIP – N  
Tube  
Tube  
SN74ALS240ADW  
ALS240A  
ALS240A-1  
AS240A  
Tape and reel SN74ALS240ADWR  
Tube SN74ALS240A-1DW  
Tape and reel SN74ALS240A-1DWR  
Tube SN74AS240ADW  
SOIC – DW  
0°C to 70°C  
Tape and reel SN74AS240ADWR  
SN74ALS240ANSR  
Tape and reel  
ALS240A  
ALS240A-1  
G240A  
SOP – NS  
SN74ALS240A-1NSR  
SN74ALS240ADBR  
Tape and reel  
SSOP – DB  
SN74ALS240A-1DBR  
G240A-1  
†
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 2002, Texas Instruments Incorporated  
On products compliant to MIL-PRF-38535, all parameters are tested  
unless otherwise noted. On all other products, production  
processing does not necessarily include testing of all parameters.  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...21

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