MC74HC540A Просмотр технического описания (PDF) - Motorola => Freescale
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MC74HC540A Datasheet PDF : 5 Pages
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Octal 3-State Inverting Buffer/
Line Driver/Line Receiver
High–Performance Silicon–Gate CMOS
The MC74HC540A is identical in pinout to the LS540. The device inputs
are compatible with Standard CMOS outputs. External pullup resistors make
them compatible with LSTTL outputs.
The HC540A is an octal inverting buffer/line driver/line receiver designed
to be used with 3–state memory address drivers, clock drivers, and other
bus–oriented systems. This device features inputs and outputs on opposite
sides of the package and two ANDed active–low output enables.
The HC540A is similar in function to the HC541A, which has non–inverting
outputs.
• Output Drive Capability: 15 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS and TTL
• Operating Voltage Range: 2 to 6V
• Low Input Current: 1µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance With the JEDEC Standard No. 7A Requirements
• Chip Complexity: 124 FETs or 31 Equivalent Gates
LOGIC DIAGRAM
2
A1
3
A2
4
A3
Data
Inputs
5
A4
6
A5
7
A6
8
A7
9
A8
Output
Enables
OE1 1
OE2
19
18
Y1
17
Y2
16
Y3
15
Y4
14
Y5
Inverting
Outputs
13
Y6
12
Y7
11
Y8
PIN 20 = VCC
PIN 10 = GND
Pinout: 20–Lead Packages (Top View)
VCC OE2 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
20 19 18 17 16 15 14 13 12 11
MC74HC540A
20
1
20
1
N SUFFIX
PLASTIC PACKAGE
CASE 738–03
DW SUFFIX
SOIC PACKAGE
CASE 751D–04
ORDERING INFORMATION
MC74HCXXXAN
MC74HCXXXADW
Plastic
SOIC
FUNCTION TABLE
Inputs
OE1 OE2 A
Output Y
L
L
L
H
L
L
H
L
HXX
Z
XHX
Z
Z = High Impedance
X = Don’t Care
1 2 3 4 5 6 7 8 9 10
OE1 A1 A2 A3 A4 A5 A6 A7 A8 GND
10/95
© Motorola, Inc. 1995
3–1
REV 6
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