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RV-3049 데이터시트(PDF) 56 Page - MICORO CRYSTAL SWITZERLAND

부품명 RV-3049
상세설명  DTCXO Temperature Compensated Real Time Clock
PDF  65 Pages
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제조업체  MICROCRYSTAL [MICORO CRYSTAL SWITZERLAND]
홈페이지  http://www.microcrystal.com
Logo MICROCRYSTAL - MICORO CRYSTAL SWITZERLAND

RV-3049 데이터시트(HTML) 56 Page - MICORO CRYSTAL SWITZERLAND

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DTCXO Temperature Compensated Real Time Clock / Calendar Module
RV-3049
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8. APPLICATION INFORMATION
Operating RV-3049 without VBACKUP Supply:
RV-3049
VDD
CLKOUT
VSS
10 nF
VDD
1
µ Controller
VBACKUP
VSS
2
CLKOE
3
GPIO
SCL
SDI
INT
SCL
SDO
SDO
CE
CE
SDI
INT
1
When operating the RV-3049 without Backup Supply Voltage, it is recommended to tie VBACKUP pin to GND,
10 kOhm resistor is recommended.
2
Pull-up resistor of the INT signal can be tied directly to supply voltage VDD.
3
CLKOUT is enabled when CLKOE input is high. It either can be permanently enabled with a pull-up resistor
to supply voltage VDD or actively controlled by the µController.
If no clock function is needed, it is recommended to disable CLKOUT by permanently tie CLKOE pin with a
pull-down resistor to GND.
Operating RV-3049 with Backup Supply Voltage VBACKUP:
RV-3049
SCL
SDI
INT
VDD
CLKOUT
VSS
10 nF
VDD
µ Controller
SCL
SDO
INT
VBACKUP
VSS
4
CLKOE
GPIO
5
VBACKUP
VBACKUP
SDO
CE
CE
SDI
4
When operating the RV-3049 with either Supercap or Lithium Battery as Backup Supply, the INT signal
also works when the device operates on VBACKUP supply voltage. Therefore it is recommended to tie the
INT
pull-up resistor to VBACKUP.
5
When a Lithium Battery is used, it is recommended to insert a protection resistor of 100 - 1’000 Ohm to
limit battery current and to prevent damage in case of soldering issues causing short between supply pins.



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