The 10-pad 5032 package Real Time Clock from Golledge


RTC SPI Bus Low Power

  • Ultra low power consumption (130nA)
  • Compliant with 4-wire SPI bus
  • Frequency-offset trimming register
  • AEC-Q200 compliant option
  • Previously named RV2123C2
Configurable Options
ParameterOption Code
Frequency tolerance
Quantity / Special Request

Please specify the quantity you require below.

The RV-2123-C2 is supplied on tape and reel. 1k or 5k 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

Ideal for designs that require SPI bus interface and low power consumption the RV-2123-C2 real time clock module provides great timing functionality including calendar functions with built-in leap-year functionality, clock functions and programmable alarm functionality.

This miniature surface mount RTC has excellent power consumption of only 130nA typical in time-keeping mode, rising to only 30uA whilst in access mode. Additionally time-keeping mode is also available at low supply voltages down to 1.1V. A robust component, the RV-2123-C2 also features excellent shock and vibration resistance and is optionally available with AEC-Q200 qualification (with full PPAP documentation available on request).

In order to align ourselves with industry-standard nomenclature the name of this product has been revised from RV2123C2 to RV-2123-C2. 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 ~ 1Hz
Dimensions 5.0 x 3.2 x 1.2mm
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 (VDD) SPI bus active 1.6 ~ 5.5V
Timekeeping mode 1.1 ~ 5.5V
Supply current (during access) 30/80µA typ/max (fscl=1MHz VDD=3V)
250/400µA typ/max (fscl=4.5MHz VDD=3V)
Supply current (time-keeping) 130/180nA typ/max (fscl=0Hz, VDD=3V)
110/160nA typ/max (fscl=0Hz, VDD=1V)
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
Package footprint and pad configuration drawing for the Golledge RV2123C2 Real Time Clock showing full dimensions.
Ordering Information

To request a quotation for the RV-2123-C2 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.


The RV-2123-C2 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:5.3 D:3.5 E:8 F:1.4 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)


SON 10-pin ceramic package with glass 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-2123-C2 is manufactured by Micro Crystal and stocked and supplied by Golledge.

Other Information

An evaluation/development board for the RV-2123-C2 is also available on request. Please contact our expert advisers at for more information. 

Block Diagram
An image of RV-2123-C2 real-time clock module with SPI bus interface and miniature surface mount package.

Real Time Clock Modules - Quick Comparison Tools

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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.