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FX919B Datasheet(PDF) 6 Page - CML Microcircuits |
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FX919B Datasheet(HTML) 6 Page - CML Microcircuits |
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6 / 47 page  4-Level FSK Modem Data Pump FX919B © 1997 Consumer Microcircuits Limited 6 D/919B/1 1.4 External Components Figure 2 Recommended External Components R1 See Section 1.5.1 C1 0.1 µF ± 20% C5 ± 5%, see Note 3 R2 100k ohm ± 5% C2 0.1 µF ± 20% C6 ± 20%, see Note 2 R3 1M ohm ± 20% C3 ± 20%, see Note 1 C7 ± 20%, see Note 2 R4 100k ohm ± 5% C4 ± 20%, see Note 1 C8 ± 5%, see Note 3 X1 See Section 1.5.5.3 Note 1: The values used for C3 and C4 should be suitable for the frequency of the crystal X1. As a guide, values (including stray capacitances) of 33pF at 1MHz falling to 18pF at 10MHz will generally prove suitable. The 'Phase-Locked Loop Modes' part of section 1.5.5.3 discusses crystal frequency tolerances. Note 2: C6 and C7 values (in nano Farads) should be equal to 50000 ÷ symbol rate, e.g. Symbol Rate C6 and C7 (nF) 2400 symbols/second 22.0 4800 symbols/second 10.0 9600 symbols/second 4.7 Note 3: C5 and C8 values (in pico Farads) should be equal to 750000 ÷ symbol rate, e.g. Symbol Rate C5 and C8 (pF) 2400 symbols/second 330 4800 symbols/second 150 9600 symbols/second 82 |
Similar Part No. - FX919B |
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Similar Description - FX919B |
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