The 8-pad 3.2x1.5 Golledge Real Time Clock package


Ultra-low Power I2C RTC Module

  • Ultra-Low power consumption of 45nA
  • Wide operating voltage of 1.1 ~ 5.5V
  • Battery switch over
  • AEC-Q200 compliant option
  • Previously named RV3028C7
Configurable Options
ParameterOption Code
Quantity / Special Request

Please specify the quantity you require below.

The RV-3028-C7 is supplied on tape and reel. 1k or 3k pcs per reel are the standard T&R pack sizes for this product. Partial quantities may be supplied on tape (no reel), or in bulk.

Product Description

The RV-3028-C7 boasts ultra-low current consumption of only 45nA, ideal for many applications requiring low power components, including IoT, wearables, portable devices, healthcare, metering, industrial and automotive. 

This RTC with miniature 3.2 x 1.5mm package and I2C bus interface offers excellent factory calibrated time accuracy of ±1ppm stability @ 25°C with built-in crystal and is operable over a wide voltage range from 1.1V to 5.5V. The RV-3028-C7 can also provide a range of frequency outputs including 32.768kHz, 8192Hz, 1024Hz, 64Hz, 32Hz, and 1Hz. 

The RV-3028-C7 also features many additional functions including backup switch, trickle charge, 32 bit UNIX time counter, external event input detection with time stamping, 43 bytes user memory and 2 bytes user RAM. 

Full AEC-Q200 qualification for automotive applications is available.

In order to align ourselves with industry-standard nomenclature the name of this product has been revised from RV3028C7 to RV-3028-C7. There have been no changes to form, fit or function of the component. You can find more information in our product change notice PCN19032005321 here.

Frequencies (selectable) 32.768kHz, 8192Hz, 1024Hz, 64Hz, 32Hz, 1Hz
Dimensions 3.2 x 1.5 x 0.8mm
Time accuracy ±1ppm max @ 25°C
Turnover temperature (T0) +25°C ±5°C
Frequency / temp coefficient -0.035ppm/°C2 ±10%
Operating temperature range -40 to +85°C
Storage temperature range -55 to +125°C
Supply voltage 1.2 ~ 5.5V (I2C bus active)
1.1 ~ 5.5V (timekeeping)
Supply current 45/60nA typ/max, VDD=3V
Ageing ±3ppm max first year @25˚C
Shock and vibration resistance ±5ppm, 5,000g, 0.3ms, ½ sine
±5ppm, 20g, 10.0 ~ 2,000Hz
Soldering condition Reflow, 260°C, 20-40sec
Package Drawing
Ordering Information

To request a quotation for the RV-3028-C7 please use the configurable options form to choose the options you require and then submit your configured product to our team. Our expert advisers are always happy to help with your requirements and can be contacted on +44 1460 256 100 or at

Following product selection you will be issued with a seven character Golledge part number. Your Golledge part number is the internationally accepted Golledge manufacturing part number (MPN) that should be used for all project documentation, including bills of materials (BoMs) and purchase orders.

If you have any queries regarding any of our documentation our dedicated sales team will be happy to help.

Technical Resources

The RV-3028-C7 real time clock is a versatile component suitable for a wide range of applications and uses including:

  • Automotive
  • Health Care
  • IoT
  • Industrial
  • Metering
  • Portable Devices
  • Wearables
Tape & Reel Specification
Tape and Reel specifications for the GTXO-C77V

A:178* / B:12 / C:3.5 / D:1.8 / E:4.0 / F:1.0 / G:61 / H:21
*Larger reel sizes are available

Handling & Storage

ESD-HBM-1A Human Body Model (HBM) 1A (250V to <500V)

MSL1 Moisture Sensitivity Level (MSL): 1 (or not applicable)


SON 8-pin ceramic package with metal lid


PbFree Lead-free (< 0.1% by weight )

RoHS compliant with no exemptions RoHS compliant with no exemptions. See our declaration

REACH REACH compliant. See our statement

Conflict Minerals Statement Free of conflict minerals. See our declaration

Halogen Free Statement Free of Halogens. See our declaration

Ozone Depletion Statement Free of Ozone-depleting substances. See our declaration

Supply Partner
Supply Partner

The RV-3028-C7 is manufactured by Micro Crystal and stocked and supplied by Golledge.

Other Information

An evaluation/development board for the RV-3028-C7 is also available on request. Please contact our expert advisers at for more information. 

Block Diagram
Block diagram showing electrical characteristics of the RV3028C7 ultra-low power real time clock module.

Real Time Clock Modules - Quick Comparison Tools

Compare RTC specifications and extra features quickly and easily


Our comparison charts for both I2C and SPI-bus interface RTC modules means you can easily compare product specifications and extra features at a glance.