74F521 Philips, 74F521 Datasheet - Page 2

• Manufacturer Part Number: 74F521
• Description: 8-bit identity comparator
• Manufacturer: Philips

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