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74HCT251DB Scheda tecnica(PDF) 5 Page - NXP Semiconductors |
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74HCT251DB Scheda tecnica(HTML) 5 Page - NXP Semiconductors |
5 / 7 page December 1990 5 Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 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 = 50 pF 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 In to Y 50 18 14 170 34 29 215 43 37 255 51 43 ns 2.0 4.5 6.0 Fig.6 tPHL/ tPLH propagation delay In to Y 55 20 16 175 35 30 220 44 37 265 53 45 ns 2.0 4.5 6.0 Fig.7 tPHL/ tPLH propagation delay Sn to Y 66 24 19 205 41 35 255 51 43 310 62 53 ns 2.0 4.5 6.0 Fig.6 tPHL/ tPLH propagation delay Sn to Y 69 25 20 205 41 35 255 51 43 310 62 53 ns 2.0 4.5 6.0 Fig.7 tPZH/ tPZL 3-state output enable time OE to Y, Y 36 13 10 140 28 24 175 35 30 210 42 36 ns 2.0 4.5 6.0 Fig.7 tPHZ/ tPLZ 3-state output disable time OE to Y, Y 39 14 11 140 28 24 170 35 30 210 42 36 ns 2.0 4.5 6.0 Fig.7 tTHL/ tTLH output transition time 19 7 6 75 15 13 95 19 16 110 22 19 ns 2.0 4.5 6.0 Figs 6 and 7 |
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