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74ALS161B Fiches technique(PDF) 6 Page - NXP Semiconductors |
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74ALS161B Fiches technique(HTML) 6 Page - NXP Semiconductors |
6 / 14 page Philips Semiconductors Product specification 74ALS161B/74ALS163B 4-bit binary counter 1991 Feb 08 6 LOGIC DIAGRAM – 74ALS163B D CP Q Q D CP Q Q D CP Q Q D CP Q Q 14 Q0 13 Q1 12 Q2 11 Q3 15 TC 6 D3 5 D2 4 D1 3 D0 7 CEP 10 CET 9 PE 1 SR 2 CP SF00663 VCC = Pin 16 GND = Pin 8 MODE SELECTION FUNCTION TABLE – 74ALS163B INPUTS OUTPUTS OPERATING MODE SR CP CEP CET PE Dn Qn TC OPERATING MODE l ↑ X X X X L L Reset (clear) h ↑ X X l l L L Parallel load h ↑ X X l h H (a) Parallel load h ↑ h h h X count (a) Count h X l X h X qn (a) Hold (do nothing) h X X l h X qn L Hold (do nothing) H = High-voltage level h = High state must be present one setup time before the Low-to-High clock transition L = Low-voltage level l = Low state must be present one setup time before the Low-to-High clock transition qn = Lower case letters indicate the state of the referenced output prior to the Low-to-High clock transition X = Don’t care (a) = The output is High when CET is High and the counter is at terminal count (HHHH) ↑ = Low-to-High clock transition |
Numéro de pièce similaire - 74ALS161B |
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Description similaire - 74ALS161B |
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