전자부품 데이터시트 검색엔진 |
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74HC191 데이터시트(PDF) 9 Page - NXP Semiconductors |
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74HC191 데이터시트(HTML) 9 Page - NXP Semiconductors |
9 / 14 page December 1990 9 Philips Semiconductors Product specification Presettable synchronous 4-bit binary up/down counter 74HC/HCT191 trem removal time PL to CP 35 7 6 8 3 2 45 9 8 55 11 9 ns 2.0 4.5 6.0 Fig.15 tsu set-up time U/D to CP 205 41 35 50 18 14 255 51 43 310 62 53 ns 2.0 4.5 6.0 Fig.17 tsu set-up time Dn to PL 100 20 17 19 7 6 125 25 21 150 30 26 ns 2.0 4.5 6.0 Fig.16 tsu set-up time CE to CP 140 28 24 44 16 13 175 35 30 210 42 36 ns 2.0 4.5 6.0 Fig.17 th hold time U/D to CP 0 0 0 −39 −14 −11 0 0 0 0 0 0 ns 2.0 4.5 6.0 Fig.17 th hold time Dn to PL 0 0 0 −11 −4 −3 0 0 0 0 0 0 ns 2.0 4.5 6.0 Fig.16 th hold time CE to CP 0 0 0 −28 −10 −8 0 0 0 0 0 0 ns 2.0 4.5 6.0 Fig.17 fmax maximum clock pulse frequency 4.0 20 24 11 33 39 3.2 16 19 2.6 13 15 MHz 2.0 4.5 6.0 Fig.10 SYMBOL PARAMETER Tamb (°C) UNIT TEST CONDITIONS 74HC VCC (V) WAVEFORMS +25 −40 to +85 −40 to +125 min. typ. max. min. max. min. max. |
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