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SN74AC240QDWRQ1 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte SN74AC240QDWRQ1
Spiegazioni elettronici  OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SN74AC240Q1
OCTAL BUFFER/DRIVER
WITH 3STATE OUTPUTS
SCAS785A − OCTOBER 2004 − REVISED JANUARY 2008
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Qualified for Automotive Applications
D 2-V to 6-V VCC Operation
D Inputs Accept Voltages to 6 V
D Max tpd of 6.5 ns at 5 V
description/ordering information
This octal buffer and line driver is designed
specifically to improve the performance and density
of 3-state memory address drivers, clock drivers, and
bus-oriented receivers and transmitters.
The SN74AC240 device is organized as two 4-bit
buffers/drivers with separate output-enable (OE)
inputs. When OE is low, the device passes inverted
data from the A inputs to the Y outputs. When OE is
high, the outputs are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40
°C to 125°C
SOIC − DW
Tape and reel
SN74AC240QDWRQ1
AC240Q
−40
°C to 125°C
TSSOP − PW
Tape and reel
SN74AC240QPWRQ1
AC240Q
† For the most current package and ordering information, see the Package Option Addendum at the end of this
document, or see the TI web site at www.ti.com.
‡ Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE
A
OUTPUT
Y
L
H
L
L
LH
H
X
Z
Copyright
 2008, 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.
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.
DW OR PW PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1


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