SN54ALS240A_07 Datasheet, PDF (1/21 Pages) Texas Instruments – OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002
D 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
D pnp Inputs Reduce dc Loading
SN54ALS240A, SN54AS240A . . . J OR W PACKAGE
SN74ALS240A . . . DB, DW, N, OR NS PACKAGE
SN74AS240A . . . DW OR N PACKAGE
(TOP VIEW)
description/ordering information
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.
The -1 version of SN74ALS240A is identical to the
standard version, except that the recommended
maximum I_OL for the -1 version is 48 mA. There is
no -1 version of the SN54ALS240A.
1OE ₁
1A1 ₂
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 ^V_CC
19 ^2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
SN54ALS240A, SN54AS240A . . . FK PACKAGE
(TOP VIEW)
1A2
3 2 1 20 19
4
18
1Y1
2Y3 ₅
17 ^2A4
1A3 6
16 1Y2
2Y2 7
15 2A3
1A4 8
14 1Y3
9 10 11 12 13
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SN74ALS240AN
SN74ALS240AN
PDIP – N
Tube
SN74ALS240A-1N
SN74ALS240A-1N
SN74AS240AN
SN74AS240AN
Tube
SN74ALS240ADW
Tape and reel SN74ALS240ADWR
ALS240A
0°C to 70°C
SOIC – DW
Tube
SN74ALS240A-1DW
Tape and reel SN74ALS240A-1DWR
ALS240A-1
Tube
SN74AS240ADW
Tape and reel SN74AS240ADWR
AS240A
SOP – NS
SN74ALS240ANSR
Tape and reel
SN74ALS240A-1NSR
ALS240A
ALS240A-1
SSOP – DB
SN74ALS240ADBR
Tape and reel
SN74ALS240A-1DBR
G240A
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.
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  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.
1