Documentation
Quick reference to our documentation types.
3 documents
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Selector Guide
Real Time Clocks Selector Guide Brochure
Nano-Power Highly Accurate RTC with Integrated Quartz Crystal for Automotive Applications
PCA2131 Receive alerts
- Preproduction
- This page contains information on a preproduction product. Specifications and information herein are subject to change without notice. For additional information contact support or your sales representative.
The PCA2131 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 ultra-low power consumption. The PCA2131 features:
- Automotive qualified AEC-Q100 grade 2
- Operating temperature range from -40 °C up to 105°C
- Clock operational up to 125 °C
- Selectable I2C-bus or SPI-bus interfaces for full flexibility when selecting the associated MCU/MPU
- Backup battery input and switch-over circuit, allowing the RTC to keep track of the time, even when the main power supply is removed
- Calendar capabilities to keep tracking of the time from years down to 1/100 seconds.
- Up to 4 time stamp registers, which can be associated to time stamp input in order to register tampering events
- Up to 2 interrupt outputs to enable/disable systems to reduce the overall current consumption
Product Details
Features
Nano-Power Device
- Clock operating voltage from 1.2 V to 5.5 V
- Supply current of 106 nA @ VDD = 3.3 V (typical)
Highly Accurate Real Timing
- ±3 ppm from -40 °C to +85 °C (typical)
- ±8 ppm from +85 °C to +105 °C (typical)
Automotive Qualified
- AEC-Q100 grade 2
Integrated Quartz Crystal and Oscillator
- 32.768 kHz quartz crystal
- Temperature compensated crystal oscillator (TCXO)
- Clock functional up to 125 °C.
Battery Backup Supported
- Battery backup input pin and switch-over circuitry
- Battery backed output voltage
- Battery low detection function
Timestamp and Interrupt Functionality
- 4x Time stamp inputs with independent registers
- 2x Interrupt pins with selectable interrupt source
Multiple Interfaces Supported
- I2C-bus support (400 kHz fast-mode)
- SPI-bus (maximum speed 6.5 Mbit/s)
Calendar Capabilities
- Provide year, month, day, weekday, hours, minutes, seconds and 1/100 seconds
- Leap year correction
Design Resources
Hardware
1 hardware offering
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Evaluation and Development BoardsPCF2131/PCA2131 Arduino® Shield