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74HC259 Datasheet(PDF) 8 Page - NXP Semiconductors |
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74HC259 Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 21 page 74HC_HCT259_4 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 04 — 25 February 2009 8 of 21 NXP Semiconductors 74HC259; 74HCT259 8-bit addressable latch 10. Dynamic characteristics Table 8. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 12. Symbol Parameter Conditions 25 °C −40 °Cto+85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Min Max 74HC259 tpd propagation delay D to Qn; see Figure 6 [2] VCC = 2.0 V - 58 185 - 230 - 280 ns VCC = 4.5 V - 21 37 - 46 - 56 ns VCC = 5.0 V; CL =15pF - 18 - - - - - ns VCC = 6.0 V - 17 31 - 39 - 48 ns An to Qn; see Figure 7 [2] VCC = 2.0 V - 58 185 - 230 - 280 ns VCC = 4.5 V - 21 37 - 46 - 56 ns VCC = 5.0 V; CL =15pF - 17 - - - - - ns VCC = 6.0 V - 17 31 - 39 - 48 ns LE to Qn; see Figure 8 [2] VCC = 2.0 V - 55 170 - 215 - 255 ns VCC = 4.5 V - 20 34 - 43 - 51 ns VCC = 5.0 V; CL =15pF - 17 - - - - - ns VCC = 6.0 V - 16 29 - 37 - 43 ns tPHL HIGH to LOW propagation delay MR to Qn; see Figure 9 VCC = 2.0 V - 50 155 - 195 - 235 ns VCC = 4.5 V - 18 31 - 39 - 47 ns VCC = 5.0 V; CL =15pF - 15 - - - - - ns VCC = 6.0 V - 14 26 - 33 - 40 ns tt transition time see Figure 8 [3] VCC = 2.0 V - 19 75 - 95 - 119 ns VCC = 4.5 V - 7 15 - 19 - 22 ns VCC = 6.0 V - 6 13 - 16 - 19 ns tW pulse width LE HIGH or LOW; see Figure 8 VCC = 2.0 V 70 17 - 90 - 105 - ns VCC = 4.5 V 14 6 - 18 - 21 - ns VCC = 6.0 V 12 5 - 15 - 18 - ns MR LOW; see Figure 9 VCC = 2.0 V 70 17 - 90 - 105 - ns VCC = 4.5 V 14 6 - 18 - 21 - ns VCC = 6.0 V 12 5 - 15 - 18 - ns |
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