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  • Real-Time Clocks
    • PCA21125
    • PCA2129
    • PCA2131TF/Q900
    • PCA85063A
    • PCA85073A
    • PCA8565
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    • PCF85363A
    • PCF8563
    • PCF8564A
    • PCF8593
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Real-Time Clocks

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Our broad assortment of tiny, full-featured real-time clocks (RTCs) delivers high accuracy and low power consumption to a variety of end applications.

NXP offers ultra-low-power RTCs that provide low power consumption enabling long battery life with regard to real-time clock functionality, as well as temperature compensated RTCs with integrated crystal CMOS optimized for very high accuracy and low power consumption for industrial applications.

AEC-Q100 Qualified RTCs are designed for highest reliability and lowest power consumption and are available with I²C or SPI bus interfaces. They have an extended operating temperature range of up to 125 °C and AEC-Q100 automotive-compliant qualification.

  • Automotive RTCs
  • RTCs with SPI
  • RTCs with Temperature Compensation
  • RTCs with I²C-Bus
  • Hardware
  • Additional Documents
Product Selector Cross Reference

Choosing the right product just got easier. View all product finder tools.

Automotive RTCs

PCA2131TF

Nano-power highly accurate RTC with integrated quartz crystal for automotive applications

PCA85073A

The PCA85073A is a CMOS1 real-time clock (RTC) and calendar optimized for low-power consumption.

PCA8565

The PCA8565A is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption.

PCA2129

The PCA2129 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 very low-power consumption.

PCA85063A

Automotive tiny real-time clock/calendar with alarm function and I²C-bus.

PCA21125

The PCA21125 is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption and an operating temperature up to 125 °C.

New RTC IC with Dual I²C Interface and Battery Backed-Up SRAM Memory

PCF85053A enhances the server’s architectures with the use of low-power standalone RTC, dual I²C interface and 128 Byte SRAM to interconnect CPU and BMC.

Read the RTC Selector Guide
Communication Infrastructure image

RTCs with SPI

PCF2127

The PCF2127 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.

PCF2123

The PCF2123 is a CMOS real-time clock (RTC) and calendar optimized for low-power applications.

PCF2129

The PCF2129 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.

PCF85063B

The PCF85063BTL is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption.

PCA21125

The PCA21125 is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption and an operating temperature up to 125 °C.

NXP Portfolio of RTC IC and RTC Modules: PCF2131TF and PCA2131TF

This video depicts a closer look at NXP’s newest real-time clock (RTC) module additions PCF2131TF and PCA2131TF.

RTCs with Temperature Compensation

PCA2131

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.

PCF2131

The PCF2131 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.

PCF2127

The PCF2127 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.

PCF2129

The PCF2129 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.

RTCs with I²C-Bus

PCF85053A

PCF85053A is a CMOS real-time clock (RTC) and calendar, optimized for low-power consumption and automatic switching to battery on primary power loss.

PCF85063A

The PCF85063ATL is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption.

PCF85063TP

The PCF85063TP is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption.

PCF85363A

The PCF85363A is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption and with automatic switching to battery on main power loss.

PCF85263A

The PCF85263A is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption and with automatic switching to battery on main power loss.

PCF8563

The PCF8563 is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption.

PCF8523

The PCF8523 is a CMOS real-time clock (RTC) and calendar optimized for low-power consumption.

PCF8564A

The PCF8564A is a CMOS real-time clock and calendar optimized for low-power consumption.

PCF8593

The PCF8593 is a CMOS1 clock and calendar circuit, optimized for low-power consumption.

Evaluation Boards and Reference Designs

NXP offers evaluation boards and reference designs that make secure edge solutions connected and efficient with innovative analog technologies. Start today.

  • Explore Hardware

Additional Documents

NXP System Management I²C, I3C and SPI Selector Guide

Selector guide of interface components for all your design needs.

Read the selector guide

Solutions Around the Core: Analog, Interfaces and NFC

Discover other solutions we offer for your designs.

Read the brochure

Automotive Solutions Advanced Analog Fact Sheet

NXP’s robust portfolio of automotive-compliant products includes over 700 devices and solutions that help enable breakthrough automotive designs.

Read the fact sheet

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