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Avance Logic, Inc.
ALC100
Quartz Crystal Requirement for ALC100/ALC100P
This document describes the quartz crystal requirements for clocking ALC100/P. 1. Frequency and Oscillation Circuits ALC100/P are designed to work from a crystal with 24.576MHz. Fig-1 shows the equivalent circuits of crystal and oscillation circuits within ALC100/P.
ALC100/P
C1 22pF
2. Crystal Requirements General Specifications Holder Type Crystal Freq. Oscillation Mode Load Cap. (CL) Freq. Tolerance(25oC) Effective Series Resistance (Rs) Effective Shunt Capacitance (Co) Drive Level Insulation Resistance Requirements HC-49 U/S 24.576 MHz Fundamental 16 ~20 pF +/- 50 ppm 40 ohm max 7 pF
CRYSTAL
XTALI Cs Rs Co XTALO 24.576MHz 10pF 10pF
22pF C2
Ls
< 0.1 mW 500 Mohm min.
ALC100 Datasheet
