PCF2123 - SPI Real time clock/calendar

Product Overview

NXP Semiconductors

Part number	PCF2123
Manufacturer	NXP Semiconductors
File Size	839.21 KB
Description	SPI Real time clock/calendar
Datasheet	PCF2123 Datasheet
Additional preview pages of the PCF2123 datasheet.

The PCF2123 is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power applications.

Real time clock provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal.
Low backup current while running: typical 100 nA at VDD = 2.0 V and Tamb = 25 C.
Resolution: seconds to years.
Watchdog functionality.
Freely programmable timer and alarm with interrupt capability.
Clock operating voltage: 1.1 V to 5.5 V.
3 line SPI-bus with separate, but combinable data input and output.
Serial interface at VDD = 1.8 V t.

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Published: Mar 13, 2010 |