SN54HC540 Datasheet, PDF (1/6 Pages) Texas Instruments – OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

D High-Current 3-State Outputs Drive Bus
Lines Directly or up to 15 LSTTL Loads
D Data Flow-Through Pinout (All Inputs on
Opposite Side From Outputs)
D Package Options Include Plastic (DW) and
Ceramic Flat (W) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
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.
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.
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.
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)
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
SN54HC540 . . . 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
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
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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.
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Copyright © 1997, Texas Instruments Incorporated
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