SI4844-B20 Datasheet, PDF (10/27 Pages) Silicon Laboratories – BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER

Si4844-B20
Table 7. Reference Clock and Crystal Characteristics
(V_DD = 2.7 to 3.6 V, T_A = –15 to 85 °C)
Parameter
Symbol Test Condition
Min
Typ
Max
Unit
XTALI Supported Reference Clock
Frequencies^*
Reference Clock Frequency
Tolerance for XTALI
REFCLK_PRESCALE
REFCLK
Reference Clock
31.130 32.768 40,000 kHz
–100
—
100
ppm
1
4095
31.130 32.768 34.406 kHz
Crystal Oscillator Frequency
Crystal Oscillator
—
32.768
—
kHz
Crystal Frequency Tolerance
–100
—
100
ppm
Board Capacitance
—
—
3.5
pF
*Note: The Si4844-B20 divides the RCLK input by REFCLK_PROSCALE to obtain REFCLK. There are some RCLK
frequencies between 31.130 kHz and 40 MHz that are not supported. For more details, see Table 9 of “AN610: Si48xx
ATDD Programming Guide.”
Table 8. Thermal Conditions
Parameter
Symbol
Min
Typ
Max
Thermal Resistance*
_JA
—
80
—
Ambient Temperature
T_A
–15
25
85
Junction Temperature
T_J
—
—
92
*Note: Thermal resistance assumes a multi-layer PCB with the exposed pad soldered to a topside PCB pad.
Unit
°C/W
°C
°C
10
Rev. 1.0