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74F521 반도체 회로 부품 판매점

8-bit identity comparator



Philips 로고
Philips
74F521 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
74F521
8-bit identity comparator
Product specification
IC15 Data Handbook
Philips
Semiconductors
1990 May 15


74F521 데이터시트, 핀배열, 회로
Philips Semiconductors
8-bit identity comparator
Product specification
74F521
FEATURES
Compares two 8-bit words in 6.5ns typical
Expandable to any word length
DESCRIPTION
The 74F521 is an expandable 8-bit comparator. It compares two
words of up to 8 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.
TYPE
74F521
TYPICAL
PROPAGATION
DELAY
7.0ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
24mA
PIN CONFIGURATION
IA=B 1
A0 2
B0 3
A1 4
B1 5
A2 6
B2 7
A3 8
B3 9
GND 10
20 VCC
19 QA=B
18 B7
17 A7
16 B6
15 A6
14 B5
13 A5
12 B4
11 A4
SF00273
ORDERING INFORMATION
DESCRIPTION
20-pin plastic DIP
20-pin plastic SOL
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
N74F521N
N74F521D
PKG DWG #
SOT146-1
SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F (U.L.) HIGH/LOW
A0 – A7
Word A inputs
1.0/1.0
B0 – B7
Word B inputs
1.0/1.0
IA=B Expansion or Enable input (active Low)
1.0/1.0
QA=B
Identity output (active Low)
50/33
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOAD VALUE HIGH/LOW
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
1.0mA/20mA
LOGIC SYMBOL
VCC = Pin 20
GND = Pin 10
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
1
IA=B
A0
B0
A1
B1
A2
B2
A3
B3 QA=B
A4
B4
A5
B5
A6
B6
A7
B7
19
SF00274
IEC/IEEE SYMBOL
2
COMP
0
4
6
8
11 A
13
15
17 3
30
5
19
A=B
7
9
12 B
14
15
18 7
1 EN
SF00275
May 15, 1990
2 853–0372 99601




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