74F280_54F280.pdf
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54F280 9-Bit Parity Generator/Checker
August 1995
54F/74F280
9-Bit Parity Generator/Checker
General Description
The 'F280 is a high-speed parity generator/checker that ac-
cepts 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
Y
Guaranteed 4000V minimum ESD protection
Commercial
Military
Package
Package Description
Number
74F280PC
N14A
14-Lead (0.300
×
Wide) Molded Dual-In-Line
54F280DM (Note 2) J14A
14-Lead Ceramic Dual-In-Line
74F280SC (Note 1)
M14A
14-Lead (0.150
×
Wide) Molded Small Outline, JEDEC
74F280SJ (Note 1)
M14D 14-Lead (0.300
×
Wide) Molded Small Outline, EIAJ
54F280FM (Note 2) W14B 14-Lead Cerpack
54F280LM (Note 2) E20A
20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13
×
reel. Use suffix
e
SCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix
e
DMQB, FMQB and LMQB.
Logic Symbols
Connection Diagrams
Pin Assignment for
DIP, SOIC and Flatpak
Pin Assignment
for LCC
TL/F/9512±3
IEEE/IEC
TL/F/9512±1
TL/F/9512±2
TL/F/9512±5
TRI-STATE
É
is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/F/9512
RRD-B30M115/Printed in U. S. A.
Unit Loading/Fan Out
54F/74F
Pin Names
Description
U.L. Input I
IH
/I
IL
HIGH/LOW Output I
OH
/I
OL
I
0
±I
8
Data Inputs
1.0/1.0
20
m
A/
b
0.6 mA
R
O
Odd Parity Output
50/33.3
b
1 mA/20 mA
R
E
Even Parity Output
50/33.3
b
1 mA/20 mA
Truth Table
Number of
Outputs
HIGH Inputs
I
0
±I
8
R
Even
R
Odd
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
Logic Diagram
TL/F/9512±4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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.
Storage Temperature
b
65
§
Cto
a
150
§
C
Ambient Temperature under Bias
b
55
§
Cto
a
125
§
C
Junction Temperature under Bias
b
55
§
Cto
a
175
§
C
Plastic
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
b
55
§
Cto
a
125
§
C
Commercial
0
§
Cto
a
70
§
C
Supply Voltage
Military
a
4.5V to
a
5.5V
b
55
§
Cto
a
150
§
C
Commercial
a
4.5V to
a
5.5V
V
CC
Pin Potential to
Ground Pin
b
0.5V to
a
7.0V
Input Voltage (Note 2)
b
0.5V to
a
7.0V
Input Current (Note 2)
b
30 mA to
a
5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
Standard Output
b
0.5V to V
CC
TRI-STATE
É
Output
b
0.5V to
a
5.5V
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
ESD Last Passing Voltage (Min) 4000V
Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
Parameter
54F/74F
Units V
CC
Conditions
Min Typ Max
V
IH
Input HIGH Voltage
2.0
V
Recognized as a HIGH Signal
V
IL
Input LOW Voltage
0.8
V
Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage
b
1.2 V Min I
IN
eb
18 mA
V
OH
Output HIGH
54F 10% V
CC
2.5
I
OH
eb
1mA
Voltage
74F 10% V
CC
2.5
V Min I
OH
eb
1mA
74F 5% V
CC
2.7
I
OH
eb
1mA
V
OL
Output LOW
54F 10% V
CC
0.5
V Min
I
OL
e
20 mA
Voltage
74F 10% V
CC
0.5
I
OL
e
20 mA
I
IH
Input HIGH Current 54F
20.0
m
A Max
V
IN
e
2.7V
74F
5.0
I
BVI
Input HIGH Current 54F
100
m
A Max
V
IN
e
7.0V
Breakdown Test
74F
7.0
I
CEX
Output HIGH
54F
250
m
A Max
V
OUT
e
V
CC
Leakage Current
74F
50
V
ID
Input Leakage Test
74F
4.75
V 0.0
I
ID
e
1.9
m
A
All Other Pins Grounded
I
OD
Output Leakage
74F
3.75
m
A 0.0
V
IOD
e
150 mV
Circuit Current
All Other Pins Grounded
I
IL
Input LOW Current
b
0.6 mA Max V
IN
e
0.5V
I
OS
Output Short-Circuit Current
b
60
b
150 mA Max V
OUT
e
0V
I
CCH
Power Supply Current
25
38 mA Max V
O
e
HIGH
3
AC Electrical Characteristics
74F
54F
74F
T
A
ea
25
§
C
T
A
,V
CC
e
Mil
T
A
,V
CC
e
Com
Symbol
Parameter
V
CC
ea
5.0V
C
L
e
50 pF
C
L
e
50 pF
Units
C
L
e
50 pF
Min
Typ Max Min Max Min Max
t
PLH
Propagation Delay
6.5
10.0
15.0
6.5
20.0
6.5
16.0
ns
t
PHL
I
n
to
R
E
6.5
11.0
16.0
6.5
21.0
6.5
17.0
t
PLH
Propagation Delay
6.0
10.0
15.0
5.0
20.0
6.0
16.0
ns
t
PHL
I
n
to
R
O
6.5
11.0
16.0
6.5
21.0
6.5
17.0
Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are
defined as follows:
74F 280 S C X
Temperature Range Family
Special Variations
74F
e
Commercial
QB
e
Military grade device with
54F
e
Military
environmental and burn-in
processing
Device Type
X
e
Devices shipped in 13
×
reel
Package Code
Temperature Range
P
e
Plastic DIP
C
e
Commercial (0
§
Cto
a
70
§
C)
D
e
Ceramic DIP
M
e
Military (
b
55
§
Cto
a
125
§
C)
F
e
Flatpak
L
e
Leadless Chip Carrier (LCC)
S
e
Small Outline SOIC JEDEC
SJ
e
Small Outline SOIC EIAJ
4
Physical Dimensions
inches (millimeters)
20-Lead Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
5
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