MC54/74F521 8-BIT IDENTITY COMPARATOR
The MC54/74F521 is an expandable 8-bit comparator. It compares two words of up to ...
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.
Compares Two 8-Bit Words in 6.5 ns Typical Expandable to Any Word Length 20-Pin Package
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
8-BIT IDENTITY COMPARATOR
FAST™
SCHOTTKY TTL
20 1
J SUFFIX CERAMIC CASE 732-03
1 IA = B
2 A0
3 B0
4 A1
5 B1
6 A2
7 B2
8 A3
9 B3
10 GND
20 1
N SUFFIX PLASTIC CASE 738-03
20 1
DW SUFFIX SOIC CASE 751D-03
ORDERING INFORMATION
MC54FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC
GUARANTEED OPERATING RANGES
Symbol VCC TA Supply Voltage Operating Ambient Temperature Range Parameter 54, 74 54 74 IOH IOL Output Current High Output Current Low 54,74 54, 74 Min 4.5 –55 0 Typ 5.0 25 25 Max 5.5 125 70 –1.0 20 mA mA Unit V °C
FAST AND LS TTL DATA 4-195
MC54/74F521
LOGIC DIAGRAM
A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 IA = 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 OA = B A4 B3 A3 B2 A2 B1 A1 B0 A0 VCC = PIN 20 GND = PIN 10
OA = B
19
18 17 16 15 14 13 12 11 9 8 7 6 5 4 3 2
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH ...
