PCA21125T/Q900/1,1

The PCA21125 is a CMOS Real-Time Clock (RTC) and calendar optimized for low-power consumption and an operating temperature up to 125 °C. Data is transferred via a Serial Peripheral Interface (SPI-bus) with a maximum data rate of 6.0 Mbit/s. Alarm and timer functions are also available with the possibility to generate a wake-up signal on the interrupt pin.

• AEC Q100 compliant for automotive applications
• Provides year, month, day, weekday, hours, minutes, and seconds based on32.768 kHz quartz crystal
• Resolution: seconds to years
• Clock operating voltage: 1.3 V to 5.5 V
• Low supply current: typical 0.8 µA at T_amb = 25 °C
• 4-line SPI-bus with separate, but combinable data input and output
• Serial interface at V_DD = 1.6 V to 5.5 V
• 1 second or 1 minute interrupt output
• 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