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MC74ACT521DW データシート(PDF) 1 Page - Motorola, Inc

部品番号 MC74ACT521DW
部品情報  8-BIT IDENTITY COMPARATOR
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メーカー  MOTOROLA [Motorola, Inc]
ホームページ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC74ACT521DW データシート(HTML) 1 Page - Motorola, Inc

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5-1
FACT DATA
8Bit 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
19
20
18
17
16
15
14
2
1
3
4
5
6
7
VCC
13
8
12
9
11
10
OA=B
B7
A7
B6
A6
B5
A5
B4
A4
IA=B
A0
B0
A1
B1
A2
B2
A3
B3
GND
PIN NAMES
A0–A7
Word A Inputs
B0–B7
Word B Inputs
IA=B
Expansion or Enable Input
OA=B
Identity Output
TRUTH TABLE
Inputs
Outputs
IA=B
A, B
OA=B
L
A = B*
L
L
A
≠ B
H
H
A = B*
H
H
A
≠ B
H
H = HIGH Voltage Level
L = LOW Voltage Level
*A0=B0, A1=B1, A2=B2, etc.
8-BIT IDENTITY
COMPARATOR
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
MC74AC521
MC74ACT521
LOGIC SYMBOL
B7 A7 B6 A6 B5 A5 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0
IA=B
OA=B


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