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SN74F240 PDF预览

SN74F240

更新时间: 2024-10-30 22:31:23
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德州仪器 - TI 驱动器输出元件
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5页 75K
描述
OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

SN74F240 数据手册

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SN54F240, SN74F240  
OCTAL BUFFERS/DRIVERS  
WITH 3-STATE OUTPUTS  
SDFS061A – D2932, MARCH 1987 – REVISED OCTOBER 1993  
SN54F240 . . . J PACKAGE  
SN74F240 . . . DB, DW, OR N PACKAGE  
(TOP VIEW)  
3-State Outputs Drive Bus Lines or Buffer  
Memory Address Registers  
Package Options Include Plastic  
Small-Outline (SOIC) and Shrink  
Small-Outline (SSOP) Packages, Ceramic  
Chip Carriers, and Plastic and Ceramic  
DIPs  
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  
description  
These octal buffers and line 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. Taken together with the F241 and  
F244, these devices provide the choice of  
selected combinations of inverting and  
noninverting outputs, symmetrical OE (active-low  
output-enable) inputs, and complementary OE  
and OE inputs.  
13 2A2  
12 1Y4  
11  
2A1  
SN54F240 . . . FK PACKAGE  
(TOP VIEW)  
3
2
1
20 19  
18  
1Y1  
2A4  
1Y2  
2A3  
1Y3  
1A2  
2Y3  
1A3  
2Y2  
1A4  
4
5
6
7
8
The F240 is organized as two 4-bit buffers/line  
drivers with separate output enable (OE) inputs.  
When OE is low, the device passes data from the  
A inputs to the Y outputs. When OE is high, the  
outputs are in the high-impedance state.  
17  
16  
15  
14  
9 10 11 12 13  
The SN74F240 is available in TI’s shrink  
small-outline package (DB), which provides the  
same I/O pin count and functionality of standard  
small-outline packages in less than half the  
printed-circuit-board area.  
The SN54F240 is characterized for operation over  
the full military temperature range of 55°C to  
125°C. The SN74F240 is characterized for  
operation from 0°C to 70°C.  
FUNCTION TABLE  
(each buffer)  
INPUTS  
OUTPUT  
Y
OE  
A
H
L
L
L
L
H
Z
H
X
Copyright 1993, Texas Instruments Incorporated  
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.  
2–1  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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