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Электронный компонент: 54AC280

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54AC280
9-Bit Parity Generator/Checker
General Description
The 'AC280 is a high-speed parity generator/checker that
accepts nine bits of input data and detects whether an even
or an odd number of these inputs is HIGH. If an even number
of inputs is HIGH, the Sum Even output is HIGH. If an odd
number is HIGH, the Sum Even output is LOW. The Sum
Odd output is the complement of the Sum Even output.
Features
n
I
CC
reduced by 50%
n
9-bit width for memory applications
n
Standard Microcircuit Drawing (SMD) 5962-92201
Logic Symbols
Pin
Names
Description
I
0
I
8
Data Inputs
O
Odd Parity Output
E
Even Parity Output
Connection Diagrams
Truth Table
Number of
Outputs
HIGH Inputs
Even
Odd
I
0
I
8
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
FACT
TM
is a trademark of Fairchild Semiconductor Corporation.
DS100359-1
IEEE/IEC
DS100359-4
Pin Assignment for
DIP and Flatpak
DS100359-2
Pin Assignment for LCC
DS100359-3
September 1998
54AC280
9-Bit
Parity
Generator/Checker
1998 National Semiconductor Corporation
DS100359
www.national.com
Logic Diagram
DS100359-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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2
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
-0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= -0.5V
-20 mA
V
I
= V
CC
+ 0.5V
+20 mA
DC Input Voltage (V
I
)
-0.5V to V
CC
+ 0.5V
DC Output Diode Current (I
OK
)
V
O
= -0.5V
-20 mA
V
O
= V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
-0.5V to V
CC
+ 0.5V
DC Output Source
or Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
50 mA
Storage Temperature (T
STG
)
-65C to +150C
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
'AC
2.0V to 6.0V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
)
54AC
-55C to +125C
Minimum Input Edge Rate (
V/
t)
'AC Devices
V
IN
from 30% to 70% of V
CC
V
CC
@
3.3V, 4.5V, 5.5V
125 mV/ns
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, output/input loading variables. National does not recommend
operation of FACT circuits outside databook specifications.
DC Characteristics for 'AC Family Devices
54AC
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to
+125C
Guaranteed Limits
V
IH
Minimum High Level
3.0
2.1
V
OUT
= 0.1V
Input Voltage
4.5
3.15
V
or V
CC
- 0.1V
5.5
3.85
V
IL
Maximum Low Level
3.0
0.9
V
OUT
= 0.1V
Input Voltage
4.5
1.35
V
or V
CC
- 0.1V
5.5
1.65
V
OH
Minimum High Level
3.0
2.9
I
OUT
= -50 A
Output Voltage
4.5
4.4
V
5.5
5.4
(Note 2)
V
IN
= V
IL
or V
IH
3.0
2.4
I
OH
= -12 mA
4.5
3.7
V
I
OH
= -24 mA
5.5
4.7
I
OH
= -24 mA
V
OL
Maximum Low Level
3.0
0.1
I
OUT
= 50 A
Output Voltage
4.5
0.1
V
5.5
0.1
(Note 2)
V
IN
= V
IL
or V
IH
3.0
0.50
I
OL
= 12 mA
4.5
0.50
V
I
OL
= 24 mA
5.5
0.50
I
OL
= 24 mA
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
I
OLD
Minimum Dynamic
Output Current
(Note 3)
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
5.5
-50
mA
V
OHD
= 3.85V Min
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3
DC Characteristics for 'AC Family Devices
(Continued)
54AC
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to
+125C
Guaranteed Limits
I
CC
Maximum Quiescent
5.5
80.0
A
V
IN
= V
CC
Supply Current
or GND
Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
Note 4: I
IN
and I
CC
@
3.0V are guaranteed to be less than or equal to the respective limit
@
5.5V V
CC
.
AC Electrical Characteristics
54AC
V
CC
T
A
= -55C
Symbol
Parameter
(V)
(Note 5)
to +125C
Units
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
3.3
1.0
20.0
ns
t
PHL
I
n
to
E
5.0
1.0
14.5
t
PLH
Propagation Delay
3.3
1.0
20.0
ns
t
PHL
I
n
to
O
5.0
1.0
14.5
Note 5: Voltage range 3.3 is 3.3V
0.3V.
Voltage range 5.0 is 5.0V
0.5V.
Capacitance
Symbol
Parameter
Typ
Units
Conditions
C
IN
Input Capacitance
4.5
pF
V
CC
= OPEN
C
PD
Power Dissipation Capacitance
75.0
pF
V
CC
= 5.0V
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4
Physical Dimensions
inches (millimeters) unless otherwise noted
20 Terminal Ceramic Leadless Chip Carrier
NS Package Number E20A
14 Lead Ceramic Dual-In-Line Package
NS Package Number J14A
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