MOTOROLA MC5474F521 8-bit identity comparator Datasheet

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 IA = B also serves as an active-LOW enable input.
8-BIT IDENTITY COMPARATOR
• Compares Two 8-Bit Words in 6.5 ns Typical
• Expandable to Any Word Length
• 20-Pin Package
FAST SCHOTTKY TTL
CONNECTION DIAGRAM (TOP VIEW)
VCC
20
OA = B
19
B7
18
A7
17
B6
16
A6
15
B5
14
A5
13
B4
12
A4
11
J SUFFIX
CERAMIC
CASE 732-03
20
1
1
2
3
4
5
6
7
8
9
10
IA = B
A0
B0
A1
B1
A2
B2
A3
B3
GND
N SUFFIX
PLASTIC
CASE 738-03
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
Max
Unit
54, 74
4.5
5.0
5.5
V
54
–55
25
125
°C
74
0
25
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
Output Current  High
54,74
–1.0
mA
IOL
Output Current  Low
54, 74
20
mA
FAST AND LS TTL DATA
4-195
70
MC54/74F521
LOGIC DIAGRAM
LOGIC SYMBOL
1
A0
B0
A1
B1
A2
B2
A3
B3
OA = B
A4
B4
19
A5
B5
A6
B6
A7
B7
IA = B B7
A7
B6
A6
B5
A5
B4
OA = B A4
B3
A3
B2
A2
B1
A1
B0
A0
18
17
16
15
14
13
12
11
9
8
7
6
5
4
3
2
VCC = PIN 20
GND = PIN 10
IA = 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
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VIK
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
Min
Typ
Max
2.0
54, 74
2.5
74
2.7
Test Conditions
V
Guaranteed Input HIGH Voltage
0.8
V
Guaranteed Input LOW Voltage
–1.2
V
IIN = – 18 mA
VCC = MIN
V
IOH = – 1.0 mA
VCC = 4.5 V
3.4
3.4
0.35
Unit
V
IOH = – 1.0 mA
VCC = 4.75 V
0.5
V
IOL = 20 mA
VCC = MIN
20
µA
VIN = 2.7 V
VCC = MAX
IIH
Input HIGH Current
100
µA
VIN = 7.0 V
IIL
Input LOW Current
–0.6
mA
VIN = 0.5 V
VCC = MAX
IOS
Output Short Circuit Current (Note 2)
–150
mA
VOUT = 0 V
VCC = MAX
ICC
Power Supply Current
32
mA
IA = B = GND
VCC = MAX
– 60
21
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
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.
AC CHARACTERISTICS
Symbol
Parameter
54/74F
54F
74F
TA = +25°C
TA = –55°C to +125°C
TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ± 10%
VCC = 5.0 V ± 10%
CL = 50 pF
CL= 50 pF
CL= 50 pF
Min
Typ
Max
Min
Max
Min
Max
Unit
ns
tPLH
Propagation Delay
2.5
6.5
10
2.5
15
2.5
11
tPHL
An or Bn to OA = B
3.0
6.5
10
3.0
12
3.0
11
tPLH
Propagation Delay
2.5
4.5
6.5
2.5
8.5
2.5
7.5
tPHL
IA = B to OA = B
3.5
5.0
9.0
3.5
10
3.5
10
Ripple Expansion
A0 B0
ENABLE
LOW
......
A7 B7
A8 B8
A15 B15
.......
IA = B
IA = B
IA = B
A16 B16 A23 B23
.......
OA = B
OA = B
OA = B
Parallel Expansion
A0 B0
A7 B7
......
IA = B
A8 B8
A15 B15
.......
IA = B
OA = B
OA = B
Figure 1. Applications
FAST AND LS TTL DATA
4-197
A16 B16 A23 B23
.......
IA = B
OA = B
ns
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