ONSEMI SN74LS280N

SN74LS280
9-Bit Odd/Even Parity
Generators/Checkers
The SN74LS280 is a Universal 9-Bit Parity Generator / Checker. It
features odd / even outputs to facilitate either odd or even parity. By
cascading, the word length is easily expanded.
The LS280 is designed without the expander input implementation,
but the corresponding function is provided by an input at Pin 4 and the
absence of any connection at Pin 3. This design permits the LS280 to
be substituted for the LS180 which results in improved performance.
The LS280 has buffered inputs to lower the drive requirements to one
LS unit load.
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LOW
POWER
SCHOTTKY
Generates Either Odd or Even Parity for Nine Data Lines
Typical Data-to-Output Delay of only 33 ns
Cascadable for n-Bits
Can Be Used To Upgrade Systems Using MSI Parity Circuits
Typical Power Dissipation = 80 mW
14
1
INPUTS
VCC
F
E
D
C
B
A
14
13
12
11
10
9
8
F
E
D
C
B
G
H
I
PLASTIC
N SUFFIX
CASE 646
A
∑
∑
EVEN ODD
14
1
1
G
2
H
3
NC
4
5
6
7
I
∑
∑ GND
INPUT EVEN ODD
SOIC
D SUFFIX
CASE 751A
INPUTS
OUTPUTS
FUNCTION TABLE
OUTPUTS
NUMBER OF INPUTS A
THRU 1 THAT ARE HIGH
0, 2, 4, 6, 8
1, 3, 5, 7, 9
∑EVEN
∑ODD
H
L
L
H
ORDERING INFORMATION
H = HIGH Level, L = LOW Level
GUARANTEED OPERATING RANGES
Symbol
VCC
Parameter
Supply Voltage
Min
Typ
Max
Unit
4.75
5.0
5.25
V
0
25
70
°C
TA
Operating Ambient
Temperature Range
IOH
Output Current – High
– 0.4
mA
IOL
Output Current – Low
8.0
mA
 Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Device
Package
Shipping
SN74LS280N
14 Pin DIP
2000 Units/Box
SN74LS280D
14 Pin
2500/Tape & Reel
Publication Order Number:
SN74LS280/D
SN74LS280
FUNCTIONAL BLOCK DIAGRAM
A (8)
B
(9)
C (10)
D
E
F
(5)
∑
EVEN
(11)
(12)
(13)
(6) ∑
ODD
G
H
(1)
(2)
I (4)
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VIK
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
VOL
O
Output LOW Voltage
IIH
Input HIGH Current
IIL
Input LOW Current
IOS
Short Circuit Current (Note 1)
ICC
Power Supply Current
Min
Typ
Max
2.0
0.8
– 0.65
2.7
– 1.5
3.5
Unit
Test Conditions
V
Guaranteed Input HIGH Voltage for
All Inputs
V
Guaranteed Input LOW Voltage for
All Inputs
V
VCC = MIN, IIN = – 18 mA
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
0.25
0.4
V
IOL = 4.0 mA
0.35
0.5
V
IOL = 8.0 mA
20
µA
VCC = MAX, VIN = 2.7 V
0.1
mA
VCC = MAX, VIN = 7.0 V
– 0.4
mA
VCC = MAX, VIN = 0.4 V
– 100
mA
VCC = MAX
27
mA
VCC = MAX
– 20
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
tPLH
tPHL
Propagation Delay, Data to Output
ΣEVEN
33
29
50
45
ns
tPLH
tPHL
Propagation Delay, Data to Output
ΣODD
23
31
35
50
ns
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2
Test Conditions
CL = 15 pF
SN74LS280
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 646–06
ISSUE M
14
8
1
7
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
B
A
F
DIM
A
B
C
D
F
G
H
J
K
L
M
N
L
N
C
–T–
SEATING
PLANE
J
K
H
D 14 PL
G
M
0.13 (0.005)
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
–A–
8
–B–
1
P 7 PL
0.25 (0.010)
7
G
M
B
M
R X 45 _
C
F
–T–
SEATING
PLANE
D 14 PL
0.25 (0.010)
T B
J
M
K
M
S
A
MILLIMETERS
MIN
MAX
18.16
18.80
6.10
6.60
3.69
4.69
0.38
0.53
1.02
1.78
2.54 BSC
1.32
2.41
0.20
0.38
2.92
3.43
7.37
7.87
–––
10_
0.38
1.01
M
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751A–03
ISSUE F
14
INCHES
MIN
MAX
0.715
0.770
0.240
0.260
0.145
0.185
0.015
0.021
0.040
0.070
0.100 BSC
0.052
0.095
0.008
0.015
0.115
0.135
0.290
0.310
–––
10_
0.015
0.039
S
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3
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
8.55
8.75
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.337
0.344
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.228
0.244
0.010
0.019
SN74LS280
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
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alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
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4
SN74LS280/D