PCF2123 datasheet(1/55 Pages) NXP

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PCF2123 Datasheet(PDF) 1 Page - NXP Semiconductors

Part #	PCF2123

Description	SPI Real time clock/calendar

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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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.

Features

I Real time clock provides year, month, day, weekday, hours, minutes, and seconds

based on a 32.768 kHz quartz crystal

I Low backup current while running: typical 100 nA at VDD = 2.0 V and Tamb =25 °C

I Resolution: seconds to years

I Watchdog functionality

I Freely programmable timer and alarm with interrupt capability

I Clock operating voltage: 1.1 V to 5.5 V

I 3 line SPI-bus with separate, but combinable data input and output

I Serial interface at VDD = 1.6 V to 5.5 V

I 1 second or 1 minute interrupt output

I Integrated oscillator load capacitors for CL =7pF

I Internal Power-On Reset (POR)

I Open-drain interrupt and clock output pins

I Programmable offset register for frequency adjustment

Applications

I Time keeping application

I Battery powered devices

I Metering

I High duration timers

I Daily alarms

I Low standby power applications

PCF2123

SPI Real time clock/calendar

Rev. 02 — 4 December 2009

Product data sheet

The deﬁnition of the abbreviations and acronyms used in this data sheet can be found in Section 19.

Similar Part No. - PCF2123

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCF2123	239Kb / 54P	SPI Real time clock/calendar Rev. 01-19 November 2008
	PCF2123	844Kb / 63P	SPI Real time clock/calendar Time keeping application Rev. 5-27 April 2011
	PCF2123	715Kb / 65P	Tiny Real-Time Clock/calendar with alarm function and I2C-bus Rev. 7-30 March 2018
	PCF2123	677Kb / 59P	Automotive tiny Real-Time Clock/calendar with alarm function and I2C-bus Rev. 4-30 March 2018
	PCF2123	1Mb / 86P	Nano-power highly accurate RTC with integrated quartz crystal for automotive applications Rev. 1.0-26 July 2021

More results

Similar Description - PCF2123

Manufacturer	Part #	Datasheet	Description
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
Micro Analog systems	MCP795WXX	969Kb / 54P	SPI Real-Time Clock Calendar
NXP Semiconductors	PCF2123	844Kb / 63P	SPI Real time clock/calendar Time keeping application Rev. 5-27 April 2011
NXP Semiconductors	PCA21125	1Mb / 42P	SPI-bus Real-Time Clock and calendar Rev. 01-16 November 2009
Microchip Technology	MCP7951X	899Kb / 58P	Battery-Backed SPI Real-Time Clock/Calendar 09/14/21
NXP Semiconductors	PCF8563	466Kb / 45P	Real-time clock/calendar Rev. 9-16 June 2011
	PCF8563TF4.118	492Kb / 50P	Real-time clock/calendar Rev. 10-3 April 2012
	PCF8563	692Kb / 30P	Real-time clock/calendar 16 April 1999

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