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74HCT1G14GW Arkusz danych(PDF) 11 Page - NXP Semiconductors |
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74HCT1G14GW Arkusz danych(HTML) 11 Page - NXP Semiconductors |
11 / 20 page 2002 May 15 11 Philips Semiconductors Product specification Inverting Schmitt-triggers 74HC1G14; 74HCT1G14 APPLICATION INFORMATION The slow input rise and fall times cause additional power dissipation, this can be calculated using the following formula: Pad =fi × (tr × ICCa +tf × ICCa) × VCC Where: Pad = additional power dissipation (µW) fi = input frequency (MHz) tr = input rise time (ns); 10% to 90% tf = input fall time (ns); 90% to 10% ICCa = average additional supply current (µA). Average ICCa differs with positive or negative input transitions, as shown in Fig.14 and Fig.15. HC1G/HCT1G14 used in relaxation oscillator circuit, see Fig.14 and Fig.16. Note to the application information: 1. All values given are typical unless otherwise specified. Fig.14 Average ICC for HC1G Schmitt-trigger devices; linear change of VI between 0.1VCC to 0.9VCC. handbook, halfpage 0 2.0 4.0 6.0 VCC (V) 200 150 50 0 100 MNA036 ICC(AV) ( µA) positive-going edge negative-going edge Fig.15 Average ICC for HCT1G Schmitt-trigger devices; linear change of VI between 0.1VCC to 0.9VCC. handbook, halfpage 04 6 2 VCC (V) 200 100 50 150 0 MNA058 ICC(AV) ( µA) positive-going edge negative-going edge Fig.16 Relaxation oscillator using the HC1G/HCT1G14. For HC1G: For HCT1G: f 1 T --- 1 0.8 RC × ----------------------- ≈ = f 1 T --- 1 0.67 RC × --------------------------- ≈ = handbook, halfpage MNA035 R C |
Podobny numer części - 74HCT1G14GW |
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Podobny opis - 74HCT1G14GW |
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