PCA2131 CMOS Real-Time Clock

Product Highlights > PCA2131 CMOS Real-Time Clock

            PCA2131 CMOS Real-Time Clock
                    NXP's nano-powered, highly accurate RTC includes an integrated quartz crystal
    

Image of NXP's PCA2131 RTC NXP's PCA2131 is a CMOS real-time clock (RTC) and calendar with an integrated temperature-compensated crystal oscillator and a 32.768 kHz quartz crystal, optimized for very high accuracy and ultra-low power consumption. The PCA2131 has a selectable I²C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a four timestamps function, and many other features.

Features

Current consumption: 106 nA at 3.3 V for PCA2131
Time accuracy: ±3 ppm at -40°C to +85°C (typical)
Selectable I²C-bus or SPI-bus interfaces for full flexibility when selecting the associated MCU/MPU
Backup battery input and switch-over circuit allows the RTC to keep track of the time, even when the main power supply is removed
Calendar capabilities to keep track of the time from years down to 1/100 seconds
Up to four time stamp registers which can be associated with the timestamp input to register tampering events
Up to two interrupt outputs to enable/disable systems to reduce the overall current consumption
PCF2131: consumer-grade with operating temperatures of -40°C up to +85°C