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| RV-3029 Datasheet, PDF (58/67 Pages) MICORO CRYSTAL SWITZERLAND – DTCXO Temperature Compensated Real Time Clock | |||
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Micro Crystal
DTCXO Temperature Compensated Real Time Clock / Calendar Module
8. APPLICATION INFORMATION
Operating RV-3029 without VBACKUP Supply:
VDD
10 nF
2
VDD INT
SDA
VBACKUP
SCL
RV-3029
1
CLKOUT
3
VSCS LKOE
INT
SDA
SCL
µ Controller
GPIO VSS
RV-3029
1 When operating the RV-3029 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-3029 with Backup Supply Voltage VBACKUP:
VDD
10 nF
VBACKUP
4
VDD INT
VBACKUP
5
SDA
VBACKUP
SCL
RV-3029
CLKOUT
VSCS LKOE
INT
SDA
SCL
µ Controller
GPIO VSS
4 When operating the RV-3029 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 - 1â000 Ohm to
limit battery current and to prevent damage in case of soldering issues causing short between supply pins.
58/67
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