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

Please specify the quantity you require below.

The RV-3149-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-3149-C3 miniature real time clock module is ideal for engineers seeking an all-in-one solution with 4-wire SPI bus interface, and features 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-3149-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 in addition to a miniature surface mount package with side castellations make this an ideal timing solution for a wide range of projects.

Frequencies (selectable) 32.768kHz, 1024Hz, 32Hz & 1Hz
Dimensions 3.7 x 2.5 x 0.9mm
Frequency tolerance @ 25°C ±10ppm typ, ±20ppm max
Time accuracy (option A) ±3ppm max (0.26s/day), 25°C
±4ppm max (0.35s/day), -0+50°C
±5ppm max (0.43s/day), -10+60°C
±6ppm max (0.52s/day), -40+85°C
±8ppm max (0.69s/day), -40+125°C
Time accuracy (option B) ±3ppm max (0.26s/day), 25°C
±5ppm max (0.43s/day), -0+50°C
±10ppm max (0.86s/day), -10+60°C
±25ppm max (2.16s/day), -40+85°C
±30ppm max (2.59s/day), -40+125°C
Storage temperature range -55 to +125°C
Supply voltage (VDD) Ditigally temperature compensated 2.1 ~ 5.5V
SPI bus active 1.4 ~ 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
Ordering Information

To request a quotation for the RV-3149-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.

Technical Resources

The RV-3149-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

A:178 / B:12 / C:4 / D:2.7 / E:4 / F:1 / G:61.5 / 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 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-3149-C3 is manufactured by Micro Crystal and stocked and supplied by Golledge.


Real Time Clock Modules - Quick Comparison Tools

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