NXP RTC PCF85263 RTC with battery back-up switch and time stamp Energy-efficient, autonomous timing circuit featuring time stamp, battery back-up, two alarms, and resolution up to 1/100 s. KEY FEATURES `` Multiple operating modes - Clock (seconds to 99 years) - Stopwatch or elapsed-time counter (1/100 s to 999 999 h) - WatchDog in parallel `` Battery input voltage can be lower or higher than VDD `` Meets UL requirements `` Time-stamp input, three time-stamp registers `` Two independent alarms `` Electronic frequency tuning via command `` Large clock operating voltage range (0.9 to 5.5 V) `` Ideal for battery-backed operation (IDD= ~0.27 µA) `` 400 kHz two-line I2C-bus interface (at VDD = 1.8 to 5.5 V) `` SO8, TSSOP8, TSSOP10, and tiny DFN2626 package APPLICATIONS `` Printers, copiers `` Electronic metering `` TVs, Blu-Ray players, projectors, etc. `` White goods `` Digital cameras `` Accurate, high-duration timers `` Data loggers NXP_07_0087_Update PCF85263 leaflet_939775017592_v2.indd 1 The NXP PCF85263 is a CMOS real-time clock (RTC) and calendar, optimized for low power consumption, that switches automatically to battery power when main power is lost. The PCF85263 can be configured as a stopwatch (or elapsedtime counter) with a resolution of up to 1/100 s. Three time stamps make it easy to register special events, and the device can also register tamper detection or time of battery switchover. A sophisticated battery backup circuit improves power efficiency. The circuit makes it possible to use a battery with a nominal voltage that is higher or lower than the regular supply voltage. For example, in a system that uses a VDD of 2.5 V, a lithium battery of 3 V can be used as a backup. 6/08/14 15:42 The PCF85263 can be used to perform standard RTC functions, such as tracking the actual time and data or acting as a reference timer. To support power management, the PCF85263 can be used to wake the microcontroller from hibernation mode, and in systems that use a PLL, it can serve as a system reference clock for the PLL input. The PCF85263 can also be used as a WatchDog timer, or as an activation timer to start measurements or initiate other functions. equipped with battery backup and a jumper to select the RTC. The board is shipped ready to use, with a quartz. In order to start, connect the power supply and use the serial interface to initiate communications for setting the actual time. Interrupt selection: at every second, minute, or hour and up to two alarms on two independent outputs. The designer can choose between a permanent or a pulse interrupt signal or one interrupt and a time-stamp input. For compensating the quartz frequency tolerance, a dedicated offset register can be programed. Full featured versions are available in TSSOP10 and lead less package DFN2626-10 package. Versions without time stamp pin are available in 8 pin packages SO8 and TSSOP8. All are equipped with an I2C Fast-Mode (FM) interface. Versions in a leadless package and equipped with an SPI (PCF85263B) interface are available on request. DEMO BOARD The PCF85263 is supported by the demo board OM13510, PCF85263A block diagram VDD 100 nF SDA SCL 100 nF VBAT VDD CLK INTA SCL OSCI OSCO MASTER TRANSMITTER/ RECEIVER VDD PCF85263A SDA TS R VSS R R: pull-up resistor R= SDA SCL (I2C-bus) tr Cb aaa-010565 PCF85263A application diagram Product number PCF85263 evaluation board I2C (OM13510) PCF85263AT PCF85263ATT PCF85262ATT1 PCF85263ATL PCF85263B* PCF85363 family** FM I²C-bus FM I²C-bus FM I²C-bus FM I²C-bus SPI I²C/SPI Battery switch, interrupt / CLK output X X X X X X Time-stamp input, separate CLK output - - X X X (X) SO8 TSSOP8 TSSOP10 DFN2626-10 DFN2626-10, TSSOP10 DFN2626-10, TSSOP8,10 Interface Package *Released on request ** RTC sister family with additional 64 Byte battery buffered RAM www.nxp.com © 2014 NXP Semiconductors N.V. All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The Date of release: August 2014 information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and Document order number: 9397 750 17592 may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof Printed in the Netherlands does not convey nor imply any license under patent- or other industrial or intellectual property rights. NXP_07_0087_Update PCF85263 leaflet_939775017592_v2.indd 2 6/08/14 15:42