MC74HCT244A 查看數據表（PDF） - Motorola => Freescale
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MC74HCT244A
Motorola => Freescale
MC74HCT244A Datasheet PDF : 7 Pages
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Octal 3-State Noninverting
Buffer/Line Driver/
Line Receiver with
LSTTL-Compatible Inputs
High–Performance Silicon–Gate CMOS
The MC54/74HCT244A is identical in pinout to the LS244. This device
may be used as a level converter for interfacing TTL or NMOS outputs to
High–Speed CMOS inputs. The HCT244A is an octal noninverting buffer
line driver line receiver designed to be used with 3–state memory address
drivers, clock drivers, and other bus–oriented systems. The device has
non–inverted outputs and two active–low output enables.
The HCT244A is the noninverting version of the HCT240. See also
HCT241.
• Output Drive Capability: 15 LSTTL Loads
• TTL NMOS–Compatible Input Levels
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 4.5 to 5.5 V
• Low Input Current: 1 µA
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 112 FETs or 28 Equivalent Gates
A1 2
A2 4
A3 6
A4 8
DATA INPUTS
B1 11
B2 13
B3 15
LOGIC DIAGRAM
18 YA1
16 YA2
14 YA3
12 YA4
9 YB1
NONINVERTING
OUTPUTS
7 YB2
5 YB3
MC54/74HCT244A
20
1
J SUFFIX
CERAMIC PACKAGE
CASE 732–03
20
1
20
1
N SUFFIX
PLASTIC PACKAGE
CASE 738–03
DW SUFFIX
SOIC PACKAGE
CASE 751D–04
20
1
SD SUFFIX
SSOP PACKAGE
CASE 940C–03
20
1
DT SUFFIX
TSSOP PACKAGE
CASE 948E–02
ORDERING INFORMATION
MC54HCTXXXAJ
Ceramic
MC74HCTXXXAN
Plastic
MC74HCTXXXADW SOIC
MC74HCTXXXASD SSOP
MC74HCTXXXADT TSSOP
PIN ASSIGNMENT
ENABLE A 1
A1 2
YB4 3
A2 4
YB3 5
A3 6
YB2 7
A4 8
YB1 9
GND 10
20 VCC
19 ENABLE B
18 YA1
17 B4
16 YA2
15 B3
14 YA3
13 B2
12 YA4
11 B1
B4 17
OUTPUT ENABLE A 1
ENABLES ENABLE B 19
3 YB4
PIN 20 = VCC
PIN 10 = GND
FUNCTION TABLE
Inputs
Enable A,
Enable B A, B
Outputs
YA, YB
L
L
L
L
H
H
H
X
Z
Z = high impedance
X = don’t care
2/97
© Motorola, Inc. 1997
1
REV 7
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