SI4730-C40-GU Datasheet, PDF (16/42 Pages) Silicon Laboratories – BROADCAST AM/FM RADIO RECEIVER

Si4730/31-C40
Table 12. Reference Clock and Crystal Characteristics
(V_DD = 2.7 to 5.5 V, V_IO = 1.85 to 3.6 V, T_A = –20 to 85 °C)
Parameter
Symbol Test Condition
RCLK Supported Frequencies¹
RCLK Frequency Tolerance²
Reference Clock
REFCLK_PRESCALE
Min
Typ
Max
Unit
31.130 32.768 40,000 kHz
–100
—
100
ppm
1
—
4095
REFCLK
31.130 32.768 34.406 kHz
Crystal Oscillator
Crystal Oscillator Frequency
Crystal Frequency Tolerance²
—
32.768
—
kHz
–100
—
100
ppm
Board Capacitance
—
—
3.5
pF
Notes:
1. The Si4730/31 divides the RCLK input by REFCLK_PRESCALE to obtain REFCLK. There are some RCLK
frequencies between 31.130 kHz and 40 MHz that are not supported. For more details, see Table 6 of “AN332: Si47xx
Programming Guide”.
2. A frequency tolerance of ±50 ppm is required for FM seek/tune using 50 kHz channel spacing.
16
Rev. 1.0