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SN74LS280 데이터시트(PDF) 1 Page - ON Semiconductor

부품명 SN74LS280
상세설명  LOW POWER SCHOTTKY
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© Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Publication Order Number:
SN74LS280/D
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.
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
13
12
11
10
9
123
456
8
7
VCC
FE
D
C
B
A
G
H
NC
I
EVEN
GND
FE
D
C
B
A
G
HI
INPUTS
INPUT
OUTPUTS
ODD
EVEN
ODD
INPUTS
FUNCTION TABLE
NUMBER OF INPUTS A
OUTPUTS
THRU 1 THAT ARE HIGH
∑EVEN ∑ODD
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
H = HIGH Level, L = LOW Level
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
4.75
5.0
5.25
V
TA
Operating Ambient
Temperature Range
0
25
70
°C
IOH
Output Current – High
– 0.4
mA
IOL
Output Current – Low
8.0
mA
LOW
POWER
SCHOTTKY
Device
Package
Shipping
ORDERING INFORMATION
SN74LS280N
14 Pin DIP
2000 Units/Box
SN74LS280D
14 Pin
SOIC
D SUFFIX
CASE 751A
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 646
14
1
14
1


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