Rainbow Electronics MAX3629 - Manual (Page 11)

MAX3629
+3.3V, Low-Jitter, Precision Clock Generator
with Multiple Outputs
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Table 1. Crystal Selection Parameters
C46 = 33pF, the measured output frequency accuracy
is -1ppm at +25°C ambient temperature.
Crystal Selection
The crystal oscillator is designed to drive a fundamental
mode, AT-cut crystal resonator. See Table 1 for recom-
mended crystal specifications. See Figure 6 for external
capacitance connection.
Figure 5. Crystal Layout
X_IN
X_OUT
27pF
33pF
CRYSTAL
(C
L
= 18pF)
Figure 6. Crystal, Capacitors Connection
PARAMETER SYMBOL MIN TYP MAX UNITS
Crystal Oscillation Frequency f OSC 25 MHz
Shunt Capacitance C O 7.0 pF
Load Capacitance C L 18 pF
Equivalent Series Resistance (ESR) R S 50

Maximum Crystal Drive Level 300 μW