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CD54HC161F3A Datasheet(PDF) 3 Page - Texas Instruments |
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CD54HC161F3A Datasheet(HTML) 3 Page - Texas Instruments |
3 / 16 page 3 MODE SELECT - FUNCTION TABLE FOR ’HC161 AND ’HCT161 OPERATING MODE INPUTS OUTPUTS MR CP PE TE SPE Pn Qn TC Reset (Clear) L XXXXX L L Parallel Load H ↑ XX l l L L H ↑ X X l h H (Note 1) Count H ↑ h h h (Note 3) X Count (Note 1) Inhibit H X I (Note 2) X h (Note 3) X qn (Note 1) H X X I (Note 2) h (Note 3) X qn L MODE SELECT - FUNCTION TABLE FOR ’HC163 AND ’HCT163 OPERATING MODE INPUTS OUTPUTS MR CP PE TE SPE Pn Qn TC Reset (Clear) l ↑ XXXX L L Parallel Load h (Note 3) ↑ XX l l L L h (Note 3) ↑ X X l h H (Note 1) Count h (Note 3) ↑ h h h (Note 3) X Count (Note 1) Inhibit h (Note 3) X I (Note 2) X h (Note 3) X qn (Note 1) h (Note 3) X X I (Note 2) h (Note 3) X qn L H = High voltage level steady state; L = Low voltage level steady state; h = High voltage level one setup time prior to the Low-to-High clock transition; l = Low voltage level one setup time prior to the Low-to-High clock transition; X = Don’t Care; q = Lower case letters indicate the state of the referenced output prior to the Low-to-High clock transition; ↑ = Low-to-High clock transition. NOTES: 1. The TC output is High when TE is High and the counter is at Terminal Count (HHHH for HC/HCT161 and ’HC/HCT163). 2. The High-to-Low transition of PE or TE on the ’HC/HCT161 and the ’HC/HCT163 should only occur while CP is HIGH for conventional operation. 3. The Low-to-High transition of SPE on the ’HC/HCT161 and SPE or MR on the ’HC/HCT163 should only occur while CP is HIGH for conventional operation. CD54/74HC161, CD54/74HCT161, CD54/74HC163, CD54/74HCT163 |
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