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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PCF2123TS 데이터시트(PDF) 41 Page - NXP Semiconductors |
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PCF2123TS 데이터시트(HTML) 41 Page - NXP Semiconductors |
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41 / 55 page  PCF2123_2 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 02 — 4 December 2009 41 of 55 NXP Semiconductors PCF2123 SPI Real time clock/calendar 13. Application information A 1 farad super capacitor combined with a low VF diode can be used as a standby or back-up supply. With the RTC in its minimum power configuration i.e. timer off and CLKOUT off, the RTC may operate for weeks. Fig 29. Typical application diagram 001aai557 CLKOE VDD CLKOUT VSS OSCI OSCO CE SCL SDI SDO PCF2123 INT 100 nF 1 F supercapacitor |
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