MC74HC540A
http://onsemi.com
2
Figure 1. Pinout: 20Lead Packages (Top View)
19
20
18
17
16
15
14
2
1
3
45
67
VCC
13
8
12
9
11
10
OE2 Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
OE1 A1
A2
A3
A4
A5
A6
A7
A8 GND
L
H
X
L
X
H
L
H
X
FUNCTION TABLE
Inputs
Output Y
OE1 OE2
A
H
L
Z
Z = High Impedance
X = Don’t Care
Figure 2. Logic Diagram
18 Y1
2
A1
17
Y2
3
A2
16
Y3
4
A3
15
Y4
5
A4
14
Y5
6
A5
13
Y6
7
A6
12
Y7
8
A7
11
Y8
9
A8
OE1
OE2
1
19
Output
Enables
Data
Inputs
Inverting
Outputs
PIN 20 = VCC
PIN 10 = GND
ORDERING INFORMATION
Device
Package
Shipping
MC74HC540ANG
PDIP20
(PbFree)
18 Units / Rail
MC74HC540ADWG
SOIC20 WIDE
(PbFree)
38 Units / Rail
MC74HC540ADWR2G
SOIC20 WIDE
(PbFree)
1000 Tape & Reel
MC74HC540ADTR2G
TSSOP20*
2500 Tape & Reel
MC74HC540AFG
SOEIAJ20
(PbFree)
40 Units / Rail
MC74HC540AFELG
SOEIAJ20
(PbFree)
2000 Tape & Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently PbFree.