IDENTITY COMPARATOR. MC54F521 Datasheet

MC54F521 COMPARATOR. Datasheet pdf. Equivalent

Part MC54F521
Description 8-BIT IDENTITY COMPARATOR
Feature MC54/74F521 8-BIT IDENTITY COMPARATOR The MC54/74F521 is an expandable 8-bit comparator. It compares.
Manufacture Motorola
Datasheet
Download MC54F521 Datasheet



MC54F521
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 en-
able input.
Compares Two 8-Bit Words in 6.5 ns Typical
Expandable to Any Word Length
20-Pin Package
CONNECTION DIAGRAM (TOP VIEW)
VCC OA = B B7 A7 B6 A6 B5 A5 B4
20 19 18 17 16 15 14 13 12
A4
11
MC54/74F521
8-BIT IDENTITY COMPARATOR
FASTSCHOTTKY TTL
20
1
J SUFFIX
CERAMIC
CASE 732-03
1 2 3 4 5 6 7 8 9 10
IA = B A0 B0 A1 B1 A2 B2 A3 B3 GND
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
TA
Supply Voltage
Operating Ambient Temperature Range
IOH Output Current High
IOL Output Current Low
54, 74
54
74
54,74
54, 74
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
MC54FXXXJ Ceramic
MC74FXXXN Plastic
MC74FXXXDW SOIC
Min Typ Max Unit
4.5 5.0 5.5
V
–55 25 125 °C
0 25 70
–1.0 mA
20 mA
FAST AND LS TTL DATA
4-195



MC54F521
MC54/74F521
LOGIC DIAGRAM
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
IA = B
OA = B
NOTE:
This diagram is provided only for the understanding
of logic operations and should not be used to estimate propagation delays.
LOGIC SYMBOL
1
IA = B B7
A7
B6
A6
B5
A5
B4
19 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
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
PARAMETER
Min Typ Max Unit
Test Conditions
VIH Input HIGH Voltage
2.0 V Guaranteed Input HIGH Voltage
VIL Input LOW Voltage
0.8 V Guaranteed Input LOW Voltage
VIK Input Clamp Diode Voltage
–1.2 V IIN = – 18 mA
VCC = MIN
VOH
Output HIGH Voltage
54, 74 2.5
3.4
V IOH = – 1.0 mA
VCC = 4.5 V
74 2.7 3.4
V IOH = – 1.0 mA
VCC = 4.75 V
VOL
Output LOW Voltage
0.35 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) – 60
–150 mA VOUT = 0 V
VCC = MAX
ICC Power Supply Current
21 32 mA IA = B = GND
VCC = MAX
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





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