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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RV-3049 датащи(PDF) 56 Page - MICORO CRYSTAL SWITZERLAND |
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RV-3049 датащи(HTML) 56 Page - MICORO CRYSTAL SWITZERLAND |
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56 / 65 page  Micro Crystal DTCXO Temperature Compensated Real Time Clock / Calendar Module RV-3049 56/65 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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