SN54AHC540_08 Datasheet, PDF (1/21 Pages) Texas Instruments – OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

D Operating Range 2-V to 5.5-V V_CC
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
description/ordering information
The ’AHC540 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.
SN54AHC540, SN74AHC540
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS260J – DECEMBER 1995 – REVISED JULY 2003
SN54AHC540 . . . J OR W PACKAGE
SN74AHC540 . . . 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
SN54AHC540 . . . 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
SN74AHC540N
SN74AHC540N
SOIC – DW
Tube
Tape and reel
SN74AHC540DW
SN74AHC540DWR
AHC540
–40°C to 85°C
SOP – NS
SSOP – DB
Tape and reel
Tape and reel
SN74AHC540NSR
SN74AHC540DBR
AHC540
HA540
TSSOP – PW
Tube
Tape and reel
SN74AHC540PW
SN74AHC540PWR
HA540
TVSOP – DGV
Tape and reel SN74AHC540DGVR
HA540
CDIP – J
Tube
SNJ54AHC540J
SNJ54AHC540J
–55°C to 125°C CFP – W
Tube
SNJ54AHC540W
SNJ54AHC540W
LCCC – FK
Tube
SNJ54AHC540FK
SNJ54AHC540FK
† _{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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