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SI4844-B20 データシート(PDF) 10 Page - Silicon Laboratories

部品番号 SI4844-B20
部品情報  BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER
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メーカー  SILABS [Silicon Laboratories]
ホームページ  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI4844-B20 データシート(HTML) 10 Page - Silicon Laboratories

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Si4844-B20
10
Rev. 1.0
Table 7. Reference Clock and Crystal Characteristics
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Reference Clock
XTALI Supported Reference Clock
Frequencies*
31.130
32.768
40,000
kHz
Reference Clock Frequency
Tolerance for XTALI
–100
100
ppm
REFCLK_PRESCALE
14095
REFCLK
31.130
32.768
34.406
kHz
Crystal Oscillator
Crystal Oscillator Frequency
—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
Unit
Thermal Resistance*
JA
—80
°C/W
Ambient Temperature
TA
–15
25
85
°C
Junction Temperature
TJ
——
92
°C
*Note:
Thermal resistance assumes a multi-layer PCB with the exposed pad soldered to a topside PCB pad.


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