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74HCT191DB Arkusz danych(PDF) 8 Page - NXP Semiconductors |
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74HCT191DB Arkusz danych(HTML) 8 Page - NXP Semiconductors |
8 / 14 page December 1990 8 Philips Semiconductors Product specification Presettable synchronous 4-bit binary up/down counter 74HC/HCT191 DC CHARACTERISTICS FOR 74HC For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr =tf = 6 ns; CL =50pF 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. tPHL/ tPLH propagation delay CP to Qn 72 26 21 220 44 37 275 55 47 330 66 56 ns 2.0 4.5 6.0 Fig.10 tPHL/ tPLH propagation delay CP to TC 83 30 24 255 51 43 320 64 54 395 77 65 ns 2.0 4.5 6.0 Fig.10 tPHL/ tPLH propagation delay CP to RC 47 17 14 150 30 26 190 38 33 225 45 38 ns 2.0 4.5 6.0 Fig.11 tPHL/ tPLH propagation delay CE to RC 33 12 10 130 26 22 165 33 28 195 39 33 ns 2.0 4.5 6.0 Fig.11 tPHL/ tPLH propagation delay Dn to Qn 61 22 18 220 44 37 275 55 47 330 66 56 ns 2.0 4.5 6.0 Fig.12 tPHL/ tPLH propagation delay PL to Qn 61 22 18 220 44 37 275 55 47 330 66 56 ns 2.0 4.5 6.0 Fig.13 tPHL/ tPLH propagation delay U/D to TC 44 16 13 190 38 32 240 48 41 285 57 48 ns 2.0 4.5 6.0 Fig.14 tPHL/ tPLH propagation delay U/D to RC 50 18 14 210 42 36 265 53 45 315 63 54 ns 2.0 4.5 6.0 Fig.14 tTHL/ tTLH output transition time 19 7 6 75 15 13 95 19 16 110 22 19 ns 2.0 4.5 6.0 Fig.15 tW clock pulse width HIGH or LOW 125 25 21 28 10 8 155 31 26 195 39 33 ns 2.0 4.5 6.0 Fig.10 tW parallel load pulse width LOW 100 20 17 22 8 6 125 25 21 150 30 26 ns 2.0 4.5 6.0 Fig.15 |
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