FAIRCHILD DM74AS27MX

Revised March 2000
DM74AS27
Triple 3-Input NOR Gate
General Description
Features
This device contains three independent 3-input gates, each
of which performs the logic NOR function.
■ Switching specifications at 50 pF
■ Switching specifications guaranteed over full
temperature and VCC range
■ Advanced oxide-isolated, ion-implanted Schottky TTL
process
■ Functionally and pin for pin compatible with Schottky,
low power Schottky, and advanced low power Schottky
TTL counterpart
■ Improved AC performance over Schottky, low power
Schottky, and advanced low power Schottky counterparts
Ordering Code:
Order Number
Package Number
Package Description
DM74AS27M
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74AS27N
N14A
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Y= A+B+C
Inputs
Output
A
B
C
Y
L
L
L
H
H
X
X
L
X
H
X
L
X
X
H
L
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
© 2000 Fairchild Semiconductor Corporation
DS006278
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DM74AS27 Triple 3-Input NOR Gate
April 1984
DM74AS27
Absolute Maximum Ratings(Note 1)
Supply Voltage
7V
Input Voltage
7V
0°C to +70°C
Operating Free Air Temperature Range
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
−65°C to +150°C
Storage Temperature Range
Typical θJA
N Package
84.0°C/W
M Package
114.0°C/W
Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
Units
4.5
5
5.5
V
VCC
Supply Voltage
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
−2
mA
IOL
LOW Level Output Current
20
mA
TA
Free Air Operating Temperature
70
°C
2
V
0
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Symbol
Parameter
Conditions
VIK
Input Clamp Voltage
VCC = 4.5V, II = −18 mA
VOH
HIGH Level
IOH = −2 mA
Output Voltage
VCC = 4.5V to 5.5V
VOL
LOW Level
VCC = 4.5V
Output Voltage
IOL = 20 mA
Min
Typ
Max
Units
−1.2
V
0.5
V
0.1
mA
VCC − 2
V
0.35
II
Input Current at Max Input Voltage VCC = 5.5V, VIH = 7V
IIH
HIGH Level Input Current
VCC = 5.5V, VIH = 2.7V
20
µA
IIL
LOW Level Input Current
VCC = 5.5V, VIL = 0.4V
−0.5
mA
IO
Output Drive Current
VCC = 5.5V, VO = 2.25V
−112
mA
ICC
Supply Current
VCC = 5.5V
−30
Outputs HIGH
4
6.4
mA
Outputs LOW
10.6
17.1
mA
Switching Characteristics
over recommended operating free air temperature range
Symbol
tPLH
tPHL
Parameter
Conditions
Propagation Delay Time
VCC = 4.5V to 5.5V
LOW-to-HIGH Level Output
RL = 500Ω
Propagation Delay Time
CL = 50 pF
HIGH-to-LOW Level Output
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Min
Max
Units
1
5.5
ns
1
4.5
ns
DM74AS27
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M14A
3
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DM74AS27 Triple 3-Input NOR Gate
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N14A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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