PCA21125T/Q900/1,1 Datasheet PDF - NXP

●The PCA21125T/Q900/1,1 is a CMOS Real-time Clock (RTC) and Calendar optimized for low-power consumption application. It provides year, month, day, weekday, hours, minutes and seconds based on 32.768kHz quartz crystal. Data is transferred via a serial peripheral interface (SPI-bus) with a maximum data rate of 6Mbps. Alarm and timer functions are also available with the possibility to generate a wake-up signal on the interrupt pin.

● Seconds to years resolution

● Freely programmable timer with interrupt capability

● Freely programmable alarm function with interrupt capability

● Integrated oscillator capacitor

● Internal power-ON Reset (POR)

● Open-drain interrupt pin

● 4-line SPI-bus with separate, but combinable data input and output

● 1 Second or 1 minute interrupt output