PCF210AA datasheet, PDF - EEWORLD Datasheet

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PCF210AA: DescriptionSPI Real time clock/calendar Time keeping application; File Size795KB，63 Pages; ManufacturerNXP; Websitehttps://www.nxp.com

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PCF210AA Overview

SPI Real time clock/calendar Time keeping application

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PCF2123

SPI Real time clock/calendar

Rev. 5 — 27 April 2011

Product data sheet

1. General description

The PCF2123 is a CMOS

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 V

= 2.0 V and T

amb

= 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 V

= 1.6 V to 5.5 V

1 second or 1 minute interrupt output

Integrated oscillator load capacitors for C

= 7 pF

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

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

Section 21.

PCF210AA Related Products

	PCF210AA	PCF212AA	PCF212HA	PCF25GA
Description	SPI Real time clock/calendar Time keeping application	SPI Real time clock/calendar Time keeping application	SPI Real time clock/calendar Time keeping application	SPI Real time clock/calendar Time keeping application

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