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SN74LVC1GX04DCKT Datasheet(PDF) 7 Page - Texas Instruments |
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SN74LVC1GX04DCKT Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 19 page  www.ti.com APPLICATION INFORMATION Values of C1 and C2 are chosen so that C L + C 1C2 C 1 ) C2 and C1 ≡ C2. Rs is the current-limiting resistor, and the of C2 at resonance frequency, i.e., Rs + XC 2 . RF is the feedback resistor that is used to bias the inverter in the RF ≅ 2.2 MΩ CL ≅ 16 pF C1 ≅ 32 pF C2 ≅ 32 pF X2 X1 CLOAD RLOAD a) Logic Diagram View Rs ≅ 1 kΩ Y SN74LVC1GU04 Portion SN74LVC1G04 Portion SN74LVC1GX04 CRYSTAL OSCILLATOR DRIVER SCES581B – JULY 2004 – REVISED DECEMBER 2006 Figure 3 shows a typical application of the SN74LVC1GX04 in a Pierce oscillator circuit. The buffered inverter (SN74LVC1G04 portion) produces a rail-to-rail voltage waveform. The recommended load for the crystal shown in this example is 16 pF. The value of the recommended load (CL) can be found in the crystal manufacturer's data sheet. value depends on the maximum power dissipation of the crystal. Generally, the recommended value of Rs is specified in the crystal manufacturer's data sheet and, usually, this value is approximately equal to the reactance linear region of operation. Usually, the value is chosen to be within 1 M Ω to 10 MΩ. Figure 3. Oscillator Circuit 7 Submit Documentation Feedback |
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