SN54HC540, SN74HC540
OCTAL BUFFERS AND LINE DRIVERS
WITH 3ĆSTATE OUTPUTS
SCLS007D − MARCH 1984 − REVISED AUGUST 2003
D
D
D
D
D
Lines Directly or Up To 15 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 8 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Data Flow-Through Pinout (All Inputs on
Opposite Side From Outputs)
SN54HC540 . . . J OR W PACKAGE
SN74HC540 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
OE1
A1
A2
A3
A4
A5
A6
A7
A8
GND
description/ordering information
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
facilitates printed circuit board layout.
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
OE2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
A2
A1
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 devices provide inverted data at the
outputs.
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
Y1
Y2
Y3
Y4
Y5
A8
GND
Y8
Y7
Y6
A3
A4
A5
A6
A7
OE1
VCC
OE2
D Wide Operating Voltage Range of 2 V to 6 V
D High-Current 3-State Outputs Drive Bus
ORDERING INFORMATION
PACKAGE†
TA
PDIP − N
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
Tube of 20
SN74HC540N
Tube of 25
SN74HC540DW
Reel of 2000
SN74HC540DWR
SOP − NS
Reel of 2000
SN74HC540NSR
HC540
SSOP − DB
Reel of 2000
SN74HC540DBR
HC540
Tube of 70
SN74HC540PW
Reel of 2000
SN74HC540PWR
Reel of 250
SN74HC540PWT
CDIP − J
Tube of 20
SNJ54HC540J
SNJ54HC540J
CFP − W
Tube of 85
SNJ54HC540W
SNJ54HC540W
LCCC − FK
Tube of 55
SNJ54HC540FK
SOIC − DW
−40°C to 85°C
TSSOP − PW
−55 C 125°C
−55°C to 125 C
SN74HC540N
HC540
HC540
SNJ54HC540FK
† 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.
Copyright 2003, 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.
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1