RTC I2C Bus Low Power

  • Extremely low current consumption
  • Trickle charger, power management & switchover
  • Backup battery input
  • AEC-Q200 compliant option
  • Previously named RV1805C3
Configurable Options
ParameterOption Code
Quantity / Special Request

Please specify the quantity you require below.

The RV-1805-C3 is supplied on tape and reel. 1k, 3k or 10k 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-1805-C3 is no longer recommended for new designs, please consider the RV-3028-C7 as a low power solution for new projects. Alternatively you can speak to a member of our expert team who will be happy to discuss this change and who can offer recommended alternatives by calling +44 1460 256 100 or emailing sales@golledge.com.

The RV-1805-C3 uncompensated real time clock features power saving mode for superbly low current consumption of only 17nA, ideal for designs where current consumption is paramount in your timing solution.

The RV-1805-C3 with I2C bus interface doesn't compromise on small size either, with an ultra-miniature footprint of only 3.7 x 2.5mm this component leaves lots of room for design layout. The RV-1805-C3 is feature-packed and includes a host of additional functionality, including programmable alarm, timer and interrupt functions, and has power management, trickle charge circuitry, switch functionality and 256 bytes of user RAM built in. The factory calibrated clock also produces timing stability of ±2ppm at 25ºC, equivalent to only 0.17s/day variation.

In order to align ourselves with industry-standard nomenclature the name of this product has been revised from RV1805C3 to RV-1805-C3. 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 (programmable) 32.768kHz ~ 1/60Hz
Dimensions 3.7 x 2.5 x 0.9mm
Frequency tolerance @ 25°C ±100ppm typ
Time accuracy ±2ppm typ (0.17s/day) @ 25°C
Operating temperature range -40 to +85°C
Storage temperature range -55 to +125°C
Frequency / temp coefficient -0.035ppm/°C2 ±10%
Supply voltage (VDD) I2C bus active 1.6 ~ 3.6V
Time-keeping mode 1.5 ~ 3.6V
Supply current (I2C, fscl=400kHz) 6µA typ (VDD=3.0V, )
1.5µA typ (VDD=1.7V)
Supply current (time-keeping VDD=3V) 60nA typ, 80nA max (32kHz XTL)
17nA typ, 25nA max (RC MODE)
22nA typ, 32nA max (RC AUTOCAL)
Ageing ±3ppm max first year
Shock and vibration resistance ±5ppm, 5,000g, 0.3ms, ½ sine
±5ppm, 20g, 10.0 ~ 2,000Hz
Soldering condition Reflow, 260°C, 20 sec max
Package Drawing
Ordering Information

To request a quotation for the RV-1805-C3 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 sales@golledge.com.

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.

CAD Models

Our RV-1805-C3 is included in the following design libraries. Click to download the library of your choice.

Technical Resources

The RV-1805-C3 real time clock is a versatile component suitable for a wide range of applications and uses including:

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

A:178* / B:12 / C:4 / D:2.7 / E:4 F:1 / G:80 / H:21
*Larger reel size available. Please ask for details

Handling & Storage

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

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


Ceramic package


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-1805-C3 is manufactured by Micro Crystal and stocked and supplied by Golledge.

Other Information

An evaluation/development board for the RV-1805-C3 is also available on request. Please contact our expert advisers at sales@golledge.com for more information. 

Block Diagram
Block Diagram


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