PCF2123TS datasheet(1/63 Pages) NXP

номер детали	PCF2123TS

подробное описание детали	SPI Real time clock/calendar Time keeping application

PDF	63 Pages

Scroll/Zoom	100%

производитель	NXP [NXP Semiconductors]

домашняя страница	http://www.nxp.com

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1.

General description

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

applications. Data is transferred serially via a Serial Peripheral Interface (SPI-bus) with a

maximum data rate of 6.25 Mbit/s. An alarm and timer function is also available providing

the possibility to generate a wake-up signal on an interrupt pin. An offset register allows

fine tuning of the clock.

2.

Features and benefits

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 =1.6 Vto5.5 V

1 second or 1 minute interrupt output

Integrated oscillator load capacitors for CL =7pF

Internal Power-On Reset (POR)

Open-drain interrupt and clock output pins

Programmable offset register for frequency adjustment

3.

Applications

Time keeping application

Battery powered devices

Metering

High duration timers

Daily alarms

Low standby power applications

PCF2123

SPI Real time clock/calendar

Rev. 5 — 27 April 2011

Product data sheet

1.

The definition of the abbreviations and acronyms used in this data sheet can be found in Section 21.

Аналогичный номер детали - PCF2123TS

производитель	номер детали	датащи	подробное описание детали
NXP Semiconductors	PCF2123TS	239Kb / 54P	SPI Real time clock/calendar Rev. 01-19 November 2008
	PCF2123TS	1Mb / 55P	SPI Real time clock/calendar Rev. 02-4 December 2009
	PCF2123TS	334Kb / 2P	Save power with small, ultra-efficient RTCs March 2011

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Аналогичное описание - PCF2123TS

производитель	номер детали	датащи	подробное описание детали
NXP Semiconductors	PCF8563	692Kb / 30P	Real-time clock/calendar 16 April 1999
Xicor Inc.	X1205	407Kb / 22P	Real Time Clock/Calendar
NXP Semiconductors	PCA2125	1Mb / 40P	SPI Real time clock / calendar Rev.00.11-30 January 2007
	PCF2123	239Kb / 54P	SPI Real time clock/calendar Rev. 01-19 November 2008
	PCA2125	189Kb / 36P	SPI Real-time clock/calendar Rev. 01-28 July 2008
	PCF2123	1Mb / 55P	SPI Real time clock/calendar Rev. 02-4 December 2009
	PCF8563	466Kb / 45P	Real-time clock/calendar Rev. 9-16 June 2011
	PCA21125	1Mb / 42P	SPI-bus Real-Time Clock and calendar Rev. 01-16 November 2009
Micro Analog systems	MCP795WXX	969Kb / 54P	SPI Real-Time Clock Calendar
NXP Semiconductors	PCF8563TF4.118	492Kb / 50P	Real-time clock/calendar Rev. 10-3 April 2012

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