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74F1779 データシート(PDF) 3 Page - NXP Semiconductors |
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74F1779 データシート(HTML) 3 Page - NXP Semiconductors |
3 / 12 page Philips Semiconductors Product specification 74F1779 8-bit bidirectional binary counter (3-State) 1989 Apr 06 3 LOGIC SYMBOL I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 15 16 123567 8 12 TC 9 14 OE CET CP VCC=Pin 13 GND=Pin 4 SF01260 S0 S1 11 10 IEC/IEEE SYMBOL SF01261 EN4 11 15 14 9 [1] [2] [4] [8] [16] [32] [64] [128] 4, 5, 8 CT=256 4, 5, 8 CT=0 12 16 1 2 3 5 6 7 8 CTR DIV 256 10 0 1 M 0 3 — EN6 1– 2 +/C5 LOAD DOWN UP HOLD 6 FUNCTION TABLE INPUTS OPERATING MODE S1 S0 CET OE CP OPERATING MODE X X X H X I/O0 to I/O7 in High impedance X X X L X Flip-flop outputs appear on I/O lines L L X H ↑ Parallel load all flip-flops (not LL) H X ↑ Hold (TC held High) H H X X ↑ Hold H L L X ↑ Count up L H L X ↑ Count down H = High voltage level L = Low voltage level X = Don’t care ↑ = Low-to-High clock transition (not LL) = S0 and S1 should never be Low voltage level at the same time in the hold mode only. |
同様の部品番号 - 74F1779 |
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同様の説明 - 74F1779 |
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