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The ECS-RTC-SOP8-5101A low power consumption I²C RTC provides timer functions based on external 32.768 kHz quartz crystal.

ECS Inc. International’s newest real-time clock is the small form factor ECS-RTC-SOP8-5101A. The 6.0 mm x 4.9 mm x 1.6 mm real-time clock has a built-in crystal oscillator with an I²C bus interface that requires an external 32.768 kHz tuning fork crystal. The tuning fork will require a frequency tolerance of ±20 ppm and a load capacitance of 6pF. This real-time clock component offers a low current consumption of just 0.8µA and operates over a 1.2 V to 5.5 V power supply voltage over the standard industrial operating temperature of -40ºC to +85ºC. The module is programmable using a series of registers supporting specialized calendar and timer functions that are ideal for battery powered, portable and remote electronic devices.


  • 6.0 mm x 4.9 mm x 1.6 mm package size
  • Built-in crystal oscillator
  • Will require ±20 ppm 6pF 32.768 kHz tuning fork crystal
  • I²C bus interface
  • Power supply voltage of 1.2 V to 5.5 V; Stability determined by external crystal
  • Low current consumption: 0.8 µA typ.
  • Operating temperature range: -40ºC ~ +85ºC
  • Programmable frequency output of 32.768 kHz, 1024 Hz or 1 Hz
  • Timer output function with adjustable period


  • IoT
  • Computers
  • Servers
  • Embedded systems
  • Ultra-low power
  • Digital clocks
ImagePart NumberFrequencyFrequency StabilityOperating TemperatureDatasheetInventory
ECS-RTC-SOP8-5101A32.768 kHz±20 ppm -40ºC ~ +85ºCDatasheetInventory

Please contact us if you need additional information or have a specific requirement in your application.

ECS Inc. International
15351 West 109th Street
Lenexa, KS 66219

Tel: 913-782-7787
Toll Free: 1-800-237-1041
Fax: 913-782-6991

ECS-RTC-SOP8-5101A Low Power Consumption I²C RTC was last modified: June 27th, 2023 by ECS Inc.