Automotive Accurate RTC with Integrated Quartz Crystal
Design Files
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Nano-Power Highly Accurate RTC with Integrated Quartz Crystal for Automotive Applications
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
Product Longevity Program
- This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The PCA2131TF/Q900 is included in the 15-year program
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Documentation
Quick reference to our documentation types
3 documents
Compact List
Application Note (1)
Data Sheet (1)
Selector Guide (1)
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Real Time Clocks Selector Guide Brochure[RTCSelectorGuideA4]
Design Resources
Hardware
Quick reference to our
board types.
1-5 of 6 hardware offerings
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Complete SolutionHVBMS Reference Design Bundle Using ETPL
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Evaluation and Development BoardsPCF2131/PCA2131 Arduino® Shield Evaluation Board
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Evaluation and Development BoardsHVBMS Battery Management Unit (BMU)
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Reference Design800 V Battery Management System (BMS) Reference Designs Using ETPL
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Software
Quick reference to our software types.
2 software files
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BSPs and Device Drivers
PCF2131 Real-Time Clock Driver with Demo App (SDK)
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BSPs and Device Drivers
PCF2131 Real-Time Clock - Application Code Hub
Note: For better experience, software downloads are recommended on desktop.