|Category||Logic => Comparators|
|Description||74F521; 8-bit Identity Comparator;; Package: SOT146-1 (DIP20), SOT163 (SO20)|
|Company||Philips Semiconductors (Acquired by NXP)|
|Datasheet||Download 74F521 datasheet
|Cross ref.||Similar parts: 54F521/BRA, 54F521/BRAJC, 54F521/BRBJC, M38510/34701BRA, S54F521F/883B, S54F521F/883C, SN54F521J, SN74F521D, SN74F521D3, SN74F521DW|
Compares two 8-bit words in 6.5ns typical Expandable to any word length
The is an expandable 8-bit comparator. It compares two words to 8 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. TYPICAL PROPAGATION DELAY 7.0ns TYPICAL SUPPLY CURRENT (TOTAL) 24mA
DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL COMMERCIAL RANGE VCC 5V ±10%, Tamb N74F521N N74F521D PKG DWG SOT146-1 SOT163-1
PINS B7 IA=B QA=B Word A inputs Word B inputs Expansion or Enable input (active Low) Identity output (active Low) DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW 20µA/0.6mA 1.0mA/20mANOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
INPUTS IA=B High voltage level L = Low voltage level X = Don't care A1=B1, A2=B2, etc. A, B A=B* AB A=B* AB OUTPUT QA=BAPPLICATIONS
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