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MC74AC521 반도체 회로 부품 판매점

8-BIT IDENTITY COMPARATOR



Motorola Semiconductors 로고
Motorola Semiconductors
MC74AC521 데이터시트, 핀배열, 회로
www.DataSheet4U.com
8ĆBit Identity Comparator
The MC74AC521/74ACT521 is an expandable 8-bit comparator. It
compares two words of up to eight bits each and provides a LOW output when
the two words match bit for bit. The expansion input IA=B also serves as an
active LOW enable input.
Compares Two 8-Bit Words in 6.5 ns Typ
Expandable to Any Word Length
20-Pin Package
Outputs Source/Sink 24 mA
• ′ACT521 has TTL-Compatible Inputs
VCC OA=B B7 A7 B6 A6 B5 A5 B4 A4
20 19 18 17 16 15 14 13 12 11
MC74AC521
MC74ACT521
8-BIT IDENTITY
COMPARATOR
N SUFFIX
CASE 738-03
PLASTIC
1 2 3 4 5 6 7 8 9 10
IA=B A0 B0 A1 B1 A2 B2 A3 B3 GND
DW SUFFIX
CASE 751D-04
PLASTIC
PIN NAMES
A0–A7
B0–B7
IA=B
OA=B
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
TRUTH TABLE
Inputs
Outputs
IA=B
L
L
H
H
A, B
A = B*
AB
A = B*
AB
OA=B
L
H
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
*A0=B0, A1=B1, A2=B2, etc.
LOGIC SYMBOL
B7 A7 B6 A6 B5 A5 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0
IA=B
OA=B
DataSheet4 U .com
FACT DATA
5-1


MC74AC521 데이터시트, 핀배열, 회로
www.DataSheet4U.com
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
IA=B
MC74AC521 MC74ACT521
LOGIC DIAGRAM
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
OA=B
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
±20
±50
±50
–65 to +150
V
V
V
mA
mA
mA
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
DataSheet4 U .com
FACT DATA
5-2




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MC74AC521

8-BIT IDENTITY COMPARATOR - Motorola Semiconductors