The 10-pad 3.7x2.5 package Golledge Real Time Clock



  • Temperature compensated accuracy
  • AEC-Q200 compliant option
  • Compliant with 4-wire SPI bus
  • Backup battery input (internal switchover)
  • Previously named RV3049C3
Configurable Options
ParameterOption Code
Time accuracy
Operating temperature range
Quantity / Special Request

Please specify the quantity you require below.

The RV-3049-C3 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-3049-C3 is no longer recommended for new designs but is suitable as a drop in replacement. For new designs please consider the RV-3149-C3 which features an updated package with identical footprint.

The RV-3049-C3 miniature real time clock module has a wealth of features in addition to the standard 24 hour clock and leap-year flag functionality calendar. Smart temperature compensation ensures tight stability of ±8ppm (equivalent to 0.7s per day) over the widest available temperature range of -40 to +125ºC, and only ±6ppm (equivalent to 0.56s per day) over more narrow ranges. The RV-3049-C3 also includes backup battery input with switchover functionality, programmable trickle charge circuitry, an integrated temperature sensor with digital output, and 8 bytes user RAM and 2 bytes EEPROM. Good shock and vibration resistance and optional AEC-Q200 qualification (with full PPAP documentation) make the RV-3049-C3 a versatile component suitable for a wide range of uses.

In order to align ourselves with industry-standard nomenclature the name of this product has been revised from RV3049C3 to RV-3049-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 (selectable) 32.768kHz, 1024Hz, 32Hz & 1Hz
Dimensions 3.7 x 2.5 x 0.9mm
Frequency tolerance @ 25°C ±10ppm typ, ±20ppm max
Storage temperature range -55 to +125°C
Supply voltage (VDD) SPI bus active 1.8 ~ 5.5V
Time-keeping mode 1.3 ~ 5.5V
Supply current (VDD=3.0V) 0.80µA typ, 1.0µA max
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
Package footprint and pad configuration drawing for the Golledge RV3049C3 Real Time Clock showing full dimensions.
Ordering Information

To request a quotation for the RV-3049-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

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-3049-C3 is included in the following design libraries. Click to download the library of your choice.

Technical Resources

The RV-3049-C3 real time clock is a versatile component suitable for a wide range of applications and uses including:

  • Automotive including car radio, GPS and other tracking systems, dashboard devices, tachometers, entertainment systems, and engine control 
  • Industrial and consumer electronics
  • Metering including E-meter and heating counters
  • Outdoor including ATM and POS systems, surveillance and safety systems, and ticketing systems
  • Portable devices
  • White goods
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

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-3049-C3 is manufactured by Micro Crystal and stocked and supplied by Golledge.

Other Information

An evaluation/development board for the RV-3049-C3 is also available on request. Please contact our expert advisers at for more information. 

Block Diagram
Block Diagram


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