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


RTC I2C bus

  • Sub miniature size
  • AEC-Q200 compliant option
  • Compliant with I2C-Bus interface (400kHz)
  • Built in crystal for adjustment-free operation
  • Programmable alarm, timer and interrupt functions
Configurable Options
ParameterOption Code
Frequency tolerance
Quantity / Special Request

Please specify the quantity you require below.

The RV8564C3 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 RV8564C3 real time clock module with I2C bus 2-wire serial interface offers excellent power consumption specifications as good as 250nA for existing design-ins. RTC built-in functions include standard clock and calendar functions, with year tracking and leap-year flagging. For new designs please consider the RV1805C3 which features ultra-low power consumption and a host of additional functionality with more competitive pricing or the RV4162C7 for our most competitive solution.

Frequencies (selectable) 32.768kHz, 1024Hz, 32Hz, 1Hz
Dimensions 3.7 x 2.5 x 0.9mm
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) I2C bus active 1.8 ~ 5.5V
Time-keeping mode 1.2 ~ 5.5V
Supply current (during access) 200µA max (fscl=100kHz)
800µA max (fscl=400kHz)
Supply current (time-keeping) 250/500nA typ/max (fscl=0Hz, VDD=3V)
225/450nA typ/max (fscl=0Hz, VDD=2V)
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 RV8564C3 Real Time Clock showing full dimensions.
Ordering Information

To request a quotation for the RV8564C3 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 RV8564C3 is included in the following design libraries. Click to download the library of your choice.

Technical Resources
Tape & Reel Specification
Tape and Reel specifications

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

Material Composition

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 RV8564C3 is manufactured by Micro Crystal and stocked and supplied by Golledge.

Other Information

An evaluation/development board for the RV8564C3 is also available on request. Please contact our expert advisers at for more information. 

Block Diagram
RV8564-C3 block diagram

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.