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MC74ACT521 Datasheet(PDF) 1 Page - Motorola, Inc |
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MC74ACT521 Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 6 page 5-1 FACT DATA 8Bit Identity Comparator The MC74AC521/74ACT521 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 Typ • Expandable to Any Word Length • 20-Pin Package • Outputs Source/Sink 24 mA • ′ACT521 has TTL-Compatible Inputs 19 20 18 17 16 15 14 2 1 3 4 5 6 7 VCC 13 8 12 9 11 10 OA=B B7 A7 B6 A6 B5 A5 B4 A4 IA=B A0 B0 A1 B1 A2 B2 A3 B3 GND PIN NAMES A0–A7 Word A Inputs B0–B7 Word B Inputs IA=B Expansion or Enable Input OA=B Identity Output TRUTH TABLE Inputs Outputs 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. 8-BIT IDENTITY COMPARATOR N SUFFIX CASE 738-03 PLASTIC DW SUFFIX CASE 751D-04 PLASTIC MC74AC521 MC74ACT521 LOGIC SYMBOL B7 A7 B6 A6 B5 A5 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0 IA=B OA=B |
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