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HEF4521B Datasheet(PDF) 7 Page - NXP Semiconductors |
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HEF4521B Datasheet(HTML) 7 Page - NXP Semiconductors |
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7 / 17 page  HEF4521B_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 5 November 2009 7 of 17 NXP Semiconductors HEF4521B 24-stage frequency divider and oscillator 12. Dynamic characteristics [1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF). Table 8. Dynamic characteristics VSS = 0 V; Tamb = 25 °C; for test circuits see Figure 6; unless otherwise specified. Symbol Parameter Conditions VDD Extrapolation formula Min Typ Max Unit tPHL HIGH to LOW propagation delay A2 to Q18; see Figure 5 5 V [1] 923 ns + (0.55 ns/pF) CL - 950 1900 ns 10 V 339 ns + (0.23 ns/pF) CL - 350 700 ns 15 V 212 ns + (0.16 ns/pF) CL - 220 440 ns Qn to Qn + 1; see Figure 5 5 V 13 ns + (0.55 ns/pF) CL -40 80 ns 10 V 4 ns + (0.23 ns/pF) CL -15 30 ns 15 V 2 ns + (0.16 ns/pF) CL -10 20 ns MR to Qn 5 V 93 ns + (0.55 ns/pF) CL - 120 240 ns 10 V 44 ns + (0.23 ns/pF) CL - 55 110 ns 15 V 32 ns + (0.16 ns/pF) CL -40 80 ns A1 to Y1; see Figure 5 5 V 63 ns + (0.55 ns/pF) CL - 90 180 ns 10 V 24 ns + (0.23 ns/pF) CL -35 70 ns 15 V 17 ns + (0.16 ns/pF) CL -25 50 ns tPLH LOW to HIGH propagation delay A2 to Q18; see Figure 5 5 V [1] 923 ns + (0.55 ns/pF) CL - 950 1900 ns 10 V 339 ns + (0.23 ns/pF) CL - 350 700 ns 15 V 212 ns + (0.16 ns/pF) CL - 220 440 ns Qn to Qn + 1; see Figure 5 5 V 13 ns + (0.55 ns/pF) CL -40 80 ns 10 V 4 ns + (0.23 ns/pF) CL -15 30 ns 15 V 2 ns + (0.16 ns/pF) CL -10 20 ns A1 to Y1; see Figure 5 5 V 33 ns + (0.55 ns/pF) CL - 60 120 ns 10 V 19 ns + (0.23 ns/pF) CL -30 60 ns 15 V 12 ns + (0.16 ns/pF) CL -20 40 ns tt transition time Qn; see Figure 5 5 V [1] 10 ns + (1.00 ns/pF) CL - 60 120 ns 10 V 9 ns + (0.42 ns/pF) CL -30 60 ns 15 V 6 ns + (0.28 ns/pF) CL -20 40 ns tW pulse width A2 HIGH; minimum width; see Figure 5 5 V 80 40 - ns 10 V 40 20 - ns 15 V 30 15 - ns MR HIGH; minimum width; see Figure 5 5 V 70 35 - ns 10 V 40 20 - ns 15 V 30 15 - ns trec recovery time MR; see Figure 5 5 V +20 −10 - ns 10 V +15 −5- ns 15 V 15 0 - ns fmax maximum frequency A1; see Figure 5 5 V 6 12 - MHz 10 V 12 25 - MHz 15 V 17 35 - MHz |
Similar Part No. - HEF4521B_09 |
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Similar Description - HEF4521B_09 |
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