PCF2129 Accurate RTC with integrated quartz crystal for industrial applications Rev. 7 19 December 2014 Product data sheet 1. General description 1 The PCF2129 is a CMOS Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption. The PCF2129 2 has a selectable I C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features. For a selection of NXP Real-Time Clocks, see Table 83 on page 75 2. Features and benefits Operating temperature range from 40 C to +85 C Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors Typical accuracy: PCF2129AT: 3 ppm from 15 C to +60 C PCF2129T: 3 ppm from 30 C to +80 C Integration of a 32.768 kHz quartz crystal and oscillator in the same package Provides year, month, day, weekday, hours, minutes, seconds, and leap year correction Timestamp function with interrupt capability detection of two different events on one multilevel input pin (for example, for tamper detection) 2 Two line bidirectional 400 kHz Fast-mode I C-bus interface 3 line SPI-bus with separate data input and output (maximum speed 6.5 Mbit/s) Battery backup input pin and switch-over circuitry Battery backed output voltage Battery low detection function Power-On Reset Override (PORO) Oscillator stop detection function Interrupt output (open-drain) Programmable 1 second or 1 minute interrupt Programmable watchdog timer with interrupt Programmable alarm function with interrupt capability Programmable square output 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.PCF2129 NXP Semiconductors Accurate RTC with integrated quartz crystal for industrial applications Clock operating voltage: 1.8 V to 4.2 V Low supply current: typical 0.70 A at V =3.3 V DD 3. Applications Electronic metering for electricity, water, and gas Precision timekeeping Access to accurate time of the day GPS equipment to reduce time to first fix Applications that require an accurate process timing Products with long automated unattended operation time 4. Ordering information Table 1. Ordering information Type number Package Name Description Version PCF2129AT SO20 plastic small outline package 20 leads SOT163-1 body width 7.5 mm PCF2129T SO16 plastic small outline package 16 leads SOT162-1 body width 7.5 mm 4.1 Ordering options Table 2. Ordering options Product type number Orderable part number Sales item Delivery form IC (12NC) revision PCF2129AT/2 PCF2129AT/2,518 935295732518 tape and reel, 13 inch, dry pack 2 PCF2129T/2 PCF2129T/2,518 935297464518 tape and reel, 13 inch, dry pack 2 5. Marking Table 3. Marking codes Product type number Marking code PCF2129AT/2 PCF2129AT PCF2129T/2 PCF2129T PCF2129 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 7 19 December 2014 2 of 86