SN74AHCT240PWE4 Datasheet, PDF (1/21 Pages) Texas Instruments – OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

D Inputs Are TTL-Voltage Compatible
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
description/ordering information
These octal buffers/drivers are designed
specifically to improve the performance and
density of 3-state memory-address drivers, clock
drivers, and bus-oriented receivers and
transmitters.
The ’AHCT240 devices are 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.
To ensure the high-impedance state during power
up or power down, OE should be tied to V_CC
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
SN54AHCT240, SN74AHCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS252K – OCTOBER 1995 – REVISED JULY 2003
SN54AHCT240 . . . J OR W PACKAGE
SN74AHCT240 . . . DB, DGV, DW, N, NS, 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 V_CC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 _2A1
SN54AHCT240 . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
1A2 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
PDIP – N
Tube
SN74AHCT240N
SN74AHCT240N
SOIC – DW
Tube
Tape and reel
SN74AHCT240DW
SN74AHCT240DWR
AHCT240
–40°C to 85°C
SOP – NS
SSOP – DB
Tape and reel
Tape and reel
SN74AHCT240NSR
SN74AHCT240DBR
AHCT240
HB240
TSSOP – PW
Tube
Tape and reel
SN74AHCT240PW
SN74AHCT240PWR
HB240
TVSOP – DGV
Tape and reel SN74AHCT240DGVR HB240
CDIP – J
Tube
SNJ54AHCT240J
SNJ54AHCT240J
–55°C to 125°C CFP – W
Tube
SNJ54AHCT240W
SNJ54AHCT240W
LCCC – FK
Tube
SNJ54AHCT240FK
SNJ54AHCT240FK
† _{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  2003, 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