Nano-Power Highly Accurate Real Time Clock for Automotive Applications

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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

データシート

アプリケーション・ノート

製品詳細

ブロック図

PCA2131 Block Diagram

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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

部品番号： PCA2131TF.