Octal Buffer/Driver. SN74AC240-Q1 Datasheet

SN74AC240-Q1 Buffer/Driver. Datasheet pdf. Equivalent

SN74AC240-Q1 Datasheet
Recommendation SN74AC240-Q1 Datasheet
Part SN74AC240-Q1
Description Octal Buffer/Driver
Feature SN74AC240-Q1; SN74AC240ĆQ1 OCTAL BUFFER/DRIVER WITH 3ĆSTATE OUTPUTS SCAS785A − OCTOBER 2004 − REVISED JANUARY 2008.
Manufacture etcTI
Datasheet
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Texas Instruments SN74AC240-Q1
SN74AC240ĆQ1
OCTAL BUFFER/DRIVER
WITH 3ĆSTATE OUTPUTS
SCAS785A − OCTOBER 2004 − REVISED JANUARY 2008
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.
DW OR PW PACKAGE
(TOP VIEW)
1OE 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 VCC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
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
TSSOP − PW
Tape and reel SN74AC240QDWRQ1
Tape and reel SN74AC240QPWRQ1
AC240Q
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
OE
A
OUTPUT
Y
L
H
L
L
L
H
H
X
Z
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.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2008, Texas Instruments Incorporated
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Texas Instruments SN74AC240-Q1
SN74AC240ĆQ1
OCTAL BUFFER/DRIVER
WITH 3ĆSTATE OUTPUTS
SCAS785A − OCTOBER 2004 − REVISED JANUARY 2008
logic diagram (positive logic)
1
1OE
1A1 2
4
1A2
6
1A3
8
1A4
18 1Y1
16 1Y2
14 1Y3
12 1Y4
19
2OE
11
2A1
13
2A2
9
2Y1
7
2Y2
15
2A3
17
2A4
5
2Y3
3
2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
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POST OFFICE BOX 655303 DALLAS, TEXAS 75265



Texas Instruments SN74AC240-Q1
SN74AC240ĆQ1
OCTAL BUFFER/DRIVER
WITH 3ĆSTATE OUTPUTS
SCAS785A − OCTOBER 2004 − REVISED JANUARY 2008
recommended operating conditions (see Note 3)
MIN MAX UNIT
VCC Supply voltage
VIH
High-level input voltage
VIL
Low-level input voltage
VI
Input voltage
VO
Output voltage
IOH
High-level output current
IOL
Low-level output current
t/v Input transition rise or fall rate
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
2
6V
2.1
3.15
V
3.85
0.9
1.35 V
1.65
0 VCC V
0 VCC V
−12
−24 mA
−24
12
24 mA
24
8 ns/V
TA
Operating free-air temperature
−40 125 °C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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