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74LVCU04AD 데이터시트(PDF) 6 Page - NXP Semiconductors |
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74LVCU04AD 데이터시트(HTML) 6 Page - NXP Semiconductors |
6 / 10 page Philips Semiconductors Product specification 74LVCU04A Hex inverter 1998 Jul 29 6 APPLICATION INFORMATION Some applications for the 74LVU04 are: • Linear amplifier (see Figure 4) • In crystal oscillator designs (see Figure 5) • Astable multivibrator (see Figure 6) SV00404 V CC R2 R1 1 mF ZL GND U04 Note: ZL > 10kΩ; AOL = 20 (typical) Au + – A OL 1 ) R 1 R 2 (1 ) A OL ) ;V OMax(P *P) VCC – 1.5 V centered at 1/2 VCC ≈ 3 k Ω < R1, R2 < 1 MΩ Typical unity gain bandwidth product is 5 MHz. Cl, see Figure10 AOL = open loop amplification Au = voltage amplification Figure 4. LVU04 used as a linear amplifier. Note to Figure 4 ZL > 10 kW; AOL = 20 (typical) Au + – A OL 1 ) R 1 R 2 (1 ) A OL) ; VO Max (P – P) ≈ VCC – 1.5 V centered at 1/2 VCC 3 k W < R1, R2 < 1 MW Typical unity gain bandwidth product is 50 MHz. AOL = open loop amplification Au = voltage amplification SV00408 U04 R2 C 2 C1 R1 out Note: C1 = 47 pF (typ.) C2 = 22 pF (typ.) R1 = 1 to 10 MW (typ.) R2 optimum value depends on the frequency and required stability against changes in VCC or average minimum ICC (ICC is typically 2 mA at VCC = 3 V and f = 1 MHz). Figure 5. Crystal oscillator configuration. Note to Figure 5 C1 = 47 pF (typ.) C2 = 22 pF (typ.) R1 = 1 to 10 MW (typ.) R2 optimum value depends on the frequency and required stability against changes in VCC or average minimum ICC. SV00406 U04 R C RS U04 Note: f + 1 T [ 1 2.2 RC R S [ 2x R The average ICC (mA) is approximately 3.5 + 0.05 x f (MHz) x C (pF) at VCC = 3.0 V. Figure 6. LVCU04 used as an astable multivibrator. Note to Figure 6 f + 1 T [ 1 2.2 RC RS ≈ 2 x R |
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