SN54AHC540 Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

D EPIC™ (Enhanced-Performance Implanted
CMOS) Process
D Operating Range 2-V to 5.5-V V_CC
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
D Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), Thin Very Small-Outline (DGV), Thin
Shrink Small-Outline (PW), and Ceramic
Flat (W) Packages, Ceramic Chip Carriers
(FK), and Standard Plastic (N) and Ceramic
(J) DIPs
description
SN54AHC540, SN74AHC540
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS260H – DECEMBER 1995 – REVISED JANUARY 2000
SN54AHC540 . . . J OR W PACKAGE
SN74AHC540 . . . DB, DGV, DW, N, 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
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.
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
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.
The SN54AHC540 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74AHC540 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each buffer/driver)
INPUTS
OE1 OE2 A
OUTPUT
Y
L
L
L
H
L
L
H
L
H
X
X
Z
X
H
X
Z
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.
EPIC is a trademark of Texas Instruments Incorporated.
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.
Copyright © 2000, 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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