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74LS51 truth table

Contextual Info: r Z 7 S C S -T H O M S O N Ä 7# [ * « L [ I O T « S M54HC51 M74HC51 DUAL 2 W IDE 2 INPUT AND/OR INVERT GATE HIGH SPEED tPD = 10 ns TYP. AT Vcc = 5 V LOW POWER DISSIPATION Ice = 1 nA (MAX.) AT Ta = 25 ‘C HIGH NOISE IMMUNITY V nih = V nil = 28 % Vcc (MIN.)