PCF85053ATK-ARD – PCF85053ATK Evaluation Board


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Product Details

Supported Devices

Analog and Mixed Signal

Real-Time Clocks


Arduino Shield

  • Equipped with Arduino Uno R3 compatible headers for direct connection to Arduino compatible MCU EVKs
  • On-board connector for external access and monitoring for I²C-bus / Alert / CLKOUT
  • 1.8 V / 3.3 V selectable power supply
  • On-board backup battery cell
  • Fully with MIMXRT1050-EVK board, including GUI (Windows 10)
  • Fully compatible with LPCXpresso55S69 dev. board, including GUI (Windows 10)
  • Fully compatible with MIMXRT685-EVK board, including GUI (Windows 10)

Operating Voltage

  • Supply voltage: 1.7 V to 3.6 V
  • Battery supply voltage: 1.55 V to 3.6 V

Communication Interface

  • Two independent I²C interfaces:
    • Primary I²C bus: Read/write capability on RTC and SRAM registers
    • Second I²C bus: Read/write capability on RTC and SRAM registers enabled by primary I²C
  • I²C device addresses:
    • RTC: 1101 111
    • SRAM: 1010 111
  • I²C clock features:
    • Max CLK frequency 400 kHz
    • Max CLK Timeout 35ms
  • I²C bus not active when switch over to battery

Real Time Clock Features

  • Real-time clock and calendar
  • Provides year, month, day, weekday, hours, minutes and seconds based on a 32.768 kHz quartz crystal
  • Support both binary mode and BCD mode
  • Support 24-hour and 12-hour mode
  • Support daylight saving mode
  • Oscillator fail flag
  • RTC clear flag
  • RTC fail flag
  • Alarm flag

Extra Features

  • Active low alert interrupt output
  • Register definition aligned to MC146818B (0 to 09h)
  • Configurable oscillator circuit for a wide variety of quartzes: CL = 6 pF, CL = 7 pF and CL = 12.5 pF
  • Operating temperature range -40 °C to 85 °C
  • Battery-backed 128 byte SRAM
  • SRAM clear to ‘0’ by RTC_CLR# Pin
  • Frequency adjustment via programmable offset register

Buy Options


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  • $60.50 USD
  • For a quantity of 1
    • Availability: In stock
    • Inventory: 8
    • Shipping: Normally ships 1-2 business days
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Quick reference to our documentation types.

2 documents

Design Resources

Design Files

2 design files


1 software file

Note: For better experience, software downloads are recommended on desktop.


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