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74F163A 데이터시트(PDF) 5 Page - NXP Semiconductors |
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74F163A 데이터시트(HTML) 5 Page - NXP Semiconductors |
5 / 14 page Philips Semiconductors Product specification 74F161A, 74F163A 4-bit binary counters 1996 Jan 29 5 74F163A MODE SELECT – FUNCTION TABLE 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 (2) Parallel load h ↑ h h h X count (2) Count h X l X h X qn (2) Hold (do nothing) h X X l h X qn L Hold (do nothing) H = High voltage level h = High voltage level one setup prior to the Low-to-High clock transition L = Low voltage level l = Low voltage level one setup prior to 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 ↑ = Low-to-High clock transition (1) = The TC output is High when CET is High and the counter is at Terminal Count (HHHH for 74F161A) (2) = The TC output is High when CET is High and the counter is at Terminal Count (HHHH for 74F163A) 74F161A LOGIC DIAGRAM R D CP Q Q R D CP Q Q R D CP Q Q R 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 MR 2 CP SF00662 VCC = Pin 16 GND = Pin 8 |
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