SPI-Bus Real-Time Clock and Calendar
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.
Product Details
Features
Key Features
- AEC Q100 compliant for automotive applications
- Provides year, month, day, weekday, hours, minutes, and seconds based on 32.768 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 Tamb = 25 °C
- 4-line SPI-bus with separate, but combinable data input and output
- Serial interface at VDD = 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
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