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74HC2GU04GV Datenblatt(PDF) 10 Page - NXP Semiconductors |
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74HC2GU04GV Datenblatt(HTML) 10 Page - NXP Semiconductors |
10 / 15 page 74HC2GU04_1 © NXP B.V. 2006. All rights reserved. Product data sheet Rev. 01 — 6 October 2006 10 of 15 NXP Semiconductors 74HC2GU04 Dual unbuffered inverter Test data is given in Table 11 and Table 12. C1 = 47 pF. C2 = 22 pF. R1 = 1 M Ω to 10 MΩ. R2 optimum value depends on the frequency and required stability against changes in VCC or average minimum ICC (ICC = 2 mA at VCC = 3.0 V and f = 1 MHz). Fig 13. Crystal oscillator application mna053 U04 out R2 R1 C1 C2 Table 11. External components for resonator (f < 1 MHz) Frequency R1 R2 C1 C2 10 kHz to 15.9 kHz 2.2 M Ω 220 k Ω 56 pF 20 pF 16 kHz to 24.9 kHz 2.2 M Ω 220 k Ω 56 pF 10 pF 25 kHz to 54.9 kHz 2.2 M Ω 100 k Ω 56 pF 10 pF 55 kHz to 129.9 kHz 2.2 M Ω 100 k Ω 47 pF 5 pF 130 kHz to 199.9 kHz 2.2 M Ω 47 k Ω 47 pF 5 pF 200 kHz to 349.9 kHz 2.2 M Ω 47 k Ω 47 pF 5 pF 350 kHz to 600 kHz 2.2 M Ω 47 k Ω 47 pF 5 pF Table 12. Optimum value for R2 Frequency R2 Optimum 3 kHz 2.0 k Ω for minimum required ICC 8.0 k Ω for minimum influence due to change in VCC 6 kHz 1.0 k Ω or minimum required ICC 4.7 k Ω or minimum influence by VCC 10 kHz 0.5 k Ω or minimum required ICC 2.0 k Ω or minimum influence by VCC 14 kHz 0.5 k Ω or minimum required ICC 2.0 k Ω or minimum influence by VCC > 14 kHz replace R2 by C3 = 35 pF (typical) |
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