MC74F521NS [MOTOROLA]
Identity Comparator, TTL, PDIP20,;
| 型号： | MC74F521NS |
| 厂家： | 
MOTOROLA |
| 描述： | Identity Comparator, TTL, PDIP20, 比较器 |
| 文件： | 总3页 (文件大小：84K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC54/74F521
8-BIT IDENTITY COMPARATOR
The MC54/74F521 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 I = also serves as an active-LOW en-
A
B
able input.
8-BIT IDENTITY COMPARATOR
FAST SCHOTTKY TTL
•
•
•
Compares Two 8-Bit Words in 6.5 ns Typical
Expandable to Any Word Length
20-Pin Package
CONNECTION DIAGRAM (TOP VIEW)
V
O
B
A
B
A
B
A
B
A
4
CC
A = B
19
7
7
6
6
5
5
4
20
18
17
16
15
14
13
12
11
J SUFFIX
CERAMIC
CASE 732-03
20
1
N SUFFIX
PLASTIC
1
2
3
4
5
6
7
8
9
10
CASE 738-03
I
A
B
A
B
A
B
A
B
3
GND
A = B
0
0
1
1
2
2
3
20
1
DW SUFFIX
SOIC
CASE 751D-03
20
1
ORDERING INFORMATION
MC54FXXXJ
Ceramic
MC74FXXXN Plastic
MC74FXXXDW SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
5.0
25
Max
5.5
125
70
Unit
V
V
CC
Supply Voltage
Operating Ambient Temperature Range
54, 74
54
4.5
–55
0
T
A
°C
74
25
I
I
Output Current
Output Current
High
Low
54,74
54, 74
–1.0
20
mA
mA
OH
OL
FAST AND LS TTL DATA
4-195
MC54/74F521
LOGIC DIAGRAM
LOGIC SYMBOL
1
A
B
0
0
I
A = B
B
A
B
A
18
7
7
6
6
A
B
1
1
17
16
15
A
B
2
2
14
B
A
B
A
5
5
4
4
13
12
11
9
A
B
3
3
O
A = B
O
19
A = B
A
B
4
4
B
A
3
3
8
7
6
5
4
B
A
B
A
2
2
1
1
A
B
5
5
A
B
6
6
B
A
3
2
0
0
A
B
7
7
V
= PIN 20
CC
GND = PIN 10
I
A = B
NOTE:
This diagram is provided only for the understanding
of logic operations and should not be used to estimate propagation delays.
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
PARAMETER
Input HIGH Voltage
Min
Typ
Max
Unit
V
Test Conditions
Guaranteed Input HIGH Voltage
Guaranteed Input LOW Voltage
V
IH
2.0
V
V
V
Input LOW Voltage
0.8
V
IL
Input Clamp Diode Voltage
Output HIGH Voltage
–1.2
V
I
I
I
I
= – 18 mA
V
V
V
V
V
= MIN
IK
IN
CC
CC
CC
CC
CC
54, 74
74
2.5
2.7
3.4
3.4
V
= – 1.0 mA
= – 1.0 mA
= 20 mA
= 2.7 V
= 4.5 V
= 4.75 V
= MIN
OH
OH
OH
OL
V
V
OL
Output LOW Voltage
0.35
0.5
20
V
µA
µA
mA
mA
mA
V
V
V
V
= MAX
IN
I
I
I
I
Input HIGH Current
Input LOW Current
100
–0.6
–150
32
= 7.0 V
IH
IN
= 0.5 V
V
CC
V
CC
V
CC
= MAX
= MAX
= MAX
IL
IN
Output Short Circuit Current (Note 2)
Power Supply Current
– 60
= 0 V
OUT
OS
CC
21
I = B = GND
A
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
4-196
MC54/74F521
FUNCTION TABLE
Inputs
Output
I
A
=
L
A, B
A = B*
A ≠ B
A = B*
A ≠ B
O
=
A B
B
L
L
H
H
H
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
*A = B , A = B , A = B , etc.
0
0
1
1
2
2
AC CHARACTERISTICS
54/74F
= +25°C
54F
74F
T
A
T
A
= –55°C to +125°C
T = 0°C to +70°C
A
V
= +5.0 V
= 50 pF
Typ
V
= 5.0 V ± 10%
V
= 5.0 V ± 10%
CC
CC
CC
C
C = 50 pF
L
C = 50 pF
L
L
Symbol
Parameter
Min
2.5
3.0
2.5
3.5
Max
10
Min
2.5
3.0
2.5
3.5
Max
15
Min
Max
11
Unit
t
Propagation Delay
6.5
2.5
3.0
2.5
3.5
ns
PLH
PHL
PLH
PHL
t
t
t
A
or B to O
=
B
6.5
10
12
11
n
n
A
Propagation Delay
to O
4.5
6.5
9.0
8.5
10
7.5
10
ns
I
A
=
=
B
5.0
B
A
Ripple Expansion
A
B
A
B
A
B
A
B
A
B
A B
23 23
0
0
7
7
8
8
15 15
16 16
.......
.......
......
ENABLE
LOW
I
=
I
=
I =
A B
A
B
A
B
O
=
O
=
O =
A B
A
B
A
B
Parallel Expansion
A
B
A
B
A
B
A
B
A
A
B
A B
23 23
0
0
7
7
8
8
.......
15 15
16 16
.......
......
I
=
B
I
=
B
A
A
I
=
B
O
=
O
=
O =
A B
A
B
A
B
Figure 1. Applications
FAST AND LS TTL DATA
4-197
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