SN54HC540, SN74HC540
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS007B – MARCH 1984 – REVISED MAY 1997
SN54HC540 . . . J OR W PACKAGE
SN74HC540 . . . DW OR N PACKAGE
(TOP VIEW)
High-Current 3-State Outputs Drive Bus
Lines Directly or up to 15 LSTTL Loads
Data Flow-Through Pinout (All Inputs on
Opposite Side From Outputs)
OE1
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
OE2
Y1
1
2
3
4
5
6
7
8
9
20
19
18
Package Options Include Plastic (DW) and
Ceramic Flat (W) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
17 Y2
16 Y3
15 Y4
14 Y5
13 Y6
12 Y7
11 Y8
description
These octal buffers and line drivers feature the
performance of the popular ’HC240 series and
offer a pinout with inputs and outputs on opposite
sides of the package. This arrangement greatly
enhances printed circuit board layout.
GND 10
SN54HC540 . . . FK PACKAGE
(TOP VIEW)
The 3-state control gate is a 2-input NOR. If either
output-enable (OE1 or OE2) input is high, all eight
outputs are in the high-impedance state. The
’HC540 provide inverted data at the outputs.
3
2
1
20 19
18
Y1
Y2
Y3
Y4
Y5
A3
A4
A5
A6
A7
4
5
6
7
8
The SN54HC540 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74HC540 is characterized for
operation from –40°C to 85°C.
17
16
15
14
9 10 11 12 13
FUNCTION TABLE
(each buffer/driver)
INPUTS
OUTPUT
Y
OE1
L
OE2
L
A
L
H
L
L
L
H
X
X
H
X
Z
Z
X
H
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.
Copyright 1997, 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.
1
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