SI4704 Datasheet, PDF (15/36 Pages) Silicon Laboratories – Worldwide FM band support (64-108 MHz) integrated antenna support EN55020 compliant

Si4704/05-C40
Table 11. 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
Min
Typ
Max
Unit
RCLK Supported Frequencies¹
RCLK Frequency Tolerance²
Reference Clock
31.130 32.768 40,000 kHz
–100
—
100
ppm
REFCLK_PRESCALE
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 Si4704/05 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. See “AN332: Si47xx Programming Guide,” Table
6 for more details.
2. A frequency tolerance of ±50 ppm is required for FM seek/tune using 50 kHz channel spacing.
Rev. 1.0
15