SN54AHCT540 Datasheet, PDF (1/17 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
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
description/ordering information
The ’AHCT540 octal buffers/drivers are ideal for
driving bus lines or buffer memory address
registers. These devices feature inputs and
outputs on opposite sides of the package to
facilitate printed circuit board layout.
The 3-state control gate is a two-input AND gate
with active-low inputs so that if either
output-enable (OE1 or OE2) input is high, all
corresponding outputs are in the high-impedance
state. The outputs provide inverted data when
they are not 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.
SN54AHCT540, SN74AHCT540
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS268L – DECEMBER 1995 – REVISED JULY 2003
SN54AHCT540 . . . J OR W PACKAGE
SN74AHCT540 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
OE1 ₁
A1 ₂
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 ^V_CC
19 ^OE2
18 Y1
17 Y2
16 Y3
15 Y4
14 Y5
13 Y6
12 Y7
11 Y8
SN54AHCT540 . . . FK PACKAGE
(TOP VIEW)
A3
3 2 1 20 19
4
18
Y1
A4 ₅
17 ^Y2
A5 6
16 Y3
A6 7
15 Y4
A7 8
14 Y5
9 10 11 12 13
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N
Tube
SN74AHCT540N
SN74AHCT540N
SOIC – DW
Tube
Tape and reel
SN74AHCT540DW
SN74AHCT540DWR
AHCT540
–40°C to 85°C
SOP – NS
SSOP – DB
Tape and reel
Tape and reel
SN74AHCT540NSR
SN74AHCT540DBR
AHCT540
HB540
TSSOP – PW
Tube
Tape and reel
SN74AHCT540PW
SN74AHCT540PWR
HB540
TVSOP – DGV Tape and reel SN74AHCT540DGVR HB540
CDIP – J
Tube
SNJ54AHCT540J
SNJ54AHCT540J
–55°C to 125°C CFP – W
Tube
SNJ54AHCT540W
SNJ54AHCT540W
LCCC – FK
Tube
SNJ54AHCT540FK SNJ54AHCT540FK
† _{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.
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