Texas Instruments SN74ALS2240DW, SN74ALS2240N Datasheet
SN74ALS2240
OCTAL BUFFER AND LINE DRIVER/MOS DRIVER
WITH 3-STATE OUTPUTS
SDAS268A – DECEMBER 1994 – REVISED NOVEMBER 1997
D
Bidirectional Quadruple-Bus Transceivers
for Driving MOS Devices
D
I/O Ports Have 25-Ω Series Resistors, So
No External Resistors Are Required
D
Package Options Include Plastic
Small-Outline (DW) Package and Standard
Plastic (N) 300-mil DIPs
description
This octal buffer and line driver/MOS driver is
designed to drive the capacitive inputs of MOS
devices and to improve the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. This device features high fan-out
and improved fan-in.
The SN74ALS2240 is characterized for operation
from 0°C to 70°C.
FUNCTION TABLE
(each buffer)
INPUTS
OE A
L H L
L LH
HXZ
OUTPUT
Y
DW OR N PACKAGE
(TOP VIEW)
1
1OE
2
1A1
3
2Y4
4
1A2
5
2Y3
6
1A3
7
2Y2
8
1A4
9
2Y1
GND
10
20
19
18
17
16
15
14
13
12
11
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
logic symbol
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
†
1
1OE
2
1A1
4
1A2
6
1A3
8
1A4
19
2OE
11
2A1
13
2A2
15
2A3
17
2A4
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.
EN
EN
18
16
14
12
1Y1
1Y2
1Y3
1Y4
9
2Y1
7
2Y2
5
2Y3
3
2Y4
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 1997, Texas Instruments Incorporated
1
SN74ALS2240
OCTAL BUFFER AND LINE DRIVER/MOS DRIVER
WITH 3-STATE OUTPUTS
SDAS268A – DECEMBER 1994 – REVISED NOVEMBER 1997
logic diagram (positive logic)
†
1
1OE
1A1
1A2
1A3
1A4
2OE
2A1
2A2
2
4
6
8
19
11
13
18
16
14
12
1Y1
1Y2
1Y3
1Y4
9
2Y1
7
2Y2
15
2A3
17 3
2A4
†
All output resistors are 25 Ω.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Input voltage, V
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
: All inputs 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
5
2Y3
2Y4
‡
I/O ports 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
Storage temperature range, T
Package thermal impedance, θ
–65°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
JA
0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
(see Note 1): DW package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
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.
NOTE 1: The package thermal impedance is calculated in accordance with JESD 51, except for through hole packages, which use a trace length
of zero.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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