pcf2123 NXP Semiconductors, pcf2123 Datasheet - Page 43
pcf2123
Manufacturer Part Number
pcf2123
Description
Spi Real Time Clock/calendar
Manufacturer
NXP Semiconductors
Datasheet
1.PCF2123.pdf
(54 pages)
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13. Application information
PCF2123_1
Product data sheet
Fig 28. Typical application diagram
A 1 farad super capacitor combined with a low V
supply. With the RTC in its minimum power configuration i.e. timer off and CLKOUT off, the RTC
may operate for weeks.
Rev. 01 — 19 November 2008
supercapacitor
100 nF
1 F
OSCI
OSCO
V
DD
CLKOE
PCF2123
V
SS
CLKOUT
F
diode can be used as a standby or back-up
INT
SDO
SCL
SDI
CE
SPI Real time clock/calendar
001aai557
PCF2123
© NXP B.V. 2008. All rights reserved.
43 of 54
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