Real Time Clocks (Rtc Modules)

Real Time Clocks (RTC) are present in all aspects of modern life. They keep an accurate measure of the time and date right down to the second. 

In order to maintain their highly accurate and succinct timekeeping and ultra low power consumption, RTCs use quartz tuning fork crystal oscillators to operate keeping track of time using very little battery current even when the equipment is turned off. 

To help our clients build accurate and complete digital products and internal systems we offer a wide range of quality RTC modules. All of our RTC products are ultra low power and have been chosen for their combination of highly competitive commercial pricing and wide range of specifications.

Please browse through our full list of RTC products below or use our product search bar to find the exact RTC module you need.

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Product Type : Real Time Clock  

A 8-pad 3.2x1.5 Golledge Real Time Clock
3.2 x 1.5 x 0.8mm

RV-3028-C7

Ultra-low Power I2C RTC Module

The RV-3028-C7 boasts ultra-low current consumption of only 45nA, ideal for many applications requiring low power components. This RTC with miniature 3.2 x 1.5mm package and I2C bus interface offers excellent ±1ppm stability @ 25°C with built-in crystal and incorporates many additional real time clock module functions including alarm, timer, interrupt, power management, 43 bytes user memory, 2 bytes user RAM and trickle charge. Full AEC-Q200 qualification is available. This product was previously named RV3028C7.

  • 1.0Hz ~ 32.768kHz
  • 45nA power consumption
  • ±1ppm stability @ 25°C
  • 1.1 ~ 5.5V supply voltage
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A 8-pad 3.2x1.5 Golledge Real Time Clock
3.2 x 1.5 x 0.8mm

RV-3032-C7

RTC module I2C bus High Accuracy

The RV-3032-C7 ultra-miniature real time clock module provides the best combination of high accuracy output with low power consumption and a tiny 3.2 x 1.5mm package. Together with a range of unique features this RTC is perfect for applications that require "always-on" time keeping.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated
  • Ultra-low Power
  • I2C-Bus
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Golledge 8-pad RTC
2.0 x 1.2 x 0.7mm

RV-8263-C8

Low Power I2C bus RTC

Providing a highly cost effective RTC module with an integrated CMOS circuit and quartz crystal, encapsulated in a 2.0 x 1.2mm hermetically sealed ceramic package with metal lid.

The RV-8263-C8 has low current consumption of just 190nA typical, provides year, month, date, weekday, hours, minutes and seconds and is operable over wide voltage range of 0.9V to 5.5V. 

Automotive AEC-Q200 qualification available  

  • 1.0Hz ~ 32.768kHz
  • Low Power RTC module
  • Compliant with I2C-Bus interface (400kHz)
  • AEC-Q200 compliant option
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A 8-pad 3.2x1.5 Golledge Real Time Clock
3.2 x 1.5 x 0.8mm

RV-8803-C7

RTC I2C bus High Accuracy

A highly accurate RTC module with I2C bus interface providing timing accuracy of ±3ppm (or ±1.81 seconds per day), the RV-8803-C7 is also the world's smallest RTC module, with a package footprint of only 3.5 x 1.5mm. In addition to providing excellent frequency stability this real time clock module is also one of the lowest power temperature compensated RTC modules with back up power requirement of only 240nA with automotive grade options available. This product was previously named RV8803C7.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated over -40 +105°C
  • Low Power
  • I2C-Bus
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RV-1805-C3
3.7 x 2.5 x 0.9mm

RV-1805-C3

RTC I2C Bus Low Power

With ultra-low current consumption of only 17nA the RV-1805-C3 boasts the lowest power consumption of our entire range of real time clock modules. This RTC with miniature 3.7 x 2.5mm package and I2C bus interface offers excellent stability for an uncompensated part and incorporates many additional functions including alarm, timer, user RAM and trickle charge.  This product was previously named RV1805C3. 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.

  • 1.0Hz ~ 32.768kHz
  • Extremely low current consumption
  • Miniature package with integrated crystal
  • Trickle charger, power management & switch
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A 10-pad 5032 Golledge Real Time Clock package
5.0 x 3.2 x 1.2mm

RV-2123-C2

RTC SPI Bus Low Power

The RV-2123-C2 real time clock (RTC) module offers the engineer SPI bus interface with low supply voltage options within a miniature surface mount package. A time-saving all-in-one solution with our lowest power consumption for an SPI bus module, this uncompensated solution also features excellent shock and vibration resistance and optional AEC-Q200 qualification.

  • 1.0Hz ~ 32.768kHz
  • Ultra low power consumption (130nA)
  • Compliant with 4-wire SPI bus
  • Time keeping mode down to 1.1 V
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A 10-pad 5032 Golledge Real Time Clock package
5.0 x 3.2 x 1.2mm

RV-3029-C2

RTC I2C Bus

Due to technology improvements the RV-3029-C2 is no longer recommended for new designs but is suitable as a drop in replacement for existing designs within a 5.0 x 3.2mm footprint which require I2C bus 2-wire serial interface and frequency stability over temperature ranges as wide as -40 to +125ºC. For new designs that require extended temperature ranges please consider the smaller and more competitive RV-3129-C3 or RV-8803-C7 for designs where power consumption is paramount. This product was previously named RV3029C2.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated accuracy
  • AEC-Q200 compliant option
  • Compliant with I2C-Bus interface (400kHz)
VIEW PRODUCT
A Golledge 10-pad 3.7x2.5 package Real Time Clock
3.7 x 2.5 x 0.9mm

RV-3029-C3

RTC I2C bus

The RV-3029-C3 is no longer recommended for new designs but is suitable as a drop in replacement for existing designs which require a miniature 3.7 x 2.5mm footprint. The RV-3029-C3 offers excellent time accuracy of ±3ppm (0.26s/day drift) and is temperature compensated, allowing for outstanding ±8ppm stability over extended operating temperature range of -40 to +125ºC. The RV-3029-C3 with I2C bus interface also features great shock and vibration resistance and is available with AEC-Q200 qualification (and full PPAP documentation) on request. This product was previously named RV3029C3.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated accuracy
  • Miniature SM package
  • AEC-Q200 compliant option
VIEW PRODUCT
A 10-pad 5032 Golledge Real Time Clock package
5.0 x 3.2 x 1.2mm

RV-3049-C2

RTC SPI Bus

Due to technology improvements the RV-3049-C2, SPI bus RTC is no longer recommended for new designs but is suitable as a drop in replacement for existing designs within a 5.0 x 3.2mm footprint and which require SPI bus and frequency stability over extended temperature ranges as wide as -40 to +125ºC. For new designs that require temperature compensation over extended temperature ranges please consider the smaller and more competitive RV-3149-C3. This product was previously named RV3049C2.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated accuracy
  • AEC-Q200 compliant option
  • Compliant with 4-wire SPI bus
VIEW PRODUCT
A Golledge 10-pad 3.7x2.5 package Real Time Clock
3.7 x 2.5 x 0.9mm

RV-3049-C3

RTC SPI Bus

The RV-3049-C3 is no longer recommended for new designs but is suitable as a drop in replacement and features superb timing stability, temperature compensation and SPI bus interface in a miniature 3.7 x 2.5mm surface mount package. Wide operating temperature ranges of -40 to +125ºC are available as is AEC-Q200 qualification and full PPAP documentation on request.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated accuracy
  • Sub miniature size
  • AEC-Q200 compliant option
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RV-3129-C3
3.7 x 2.5 x 0.9mm

RV-3129-C3

RTC I2C bus

Within a miniature 3.7 x 2.5mm footprint the RV-3129-C3 offers excellent time accuracy and is temperature compensated, allowing for outstanding ±8ppm stability over extended operating temperature range of -40 to +125ºC. The RV-3129-C3 with I2C bus interface also features great shock and vibration resistance and is available with AEC-Q200 qualification (and full PPAP documentation) on request.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated accuracy
  • Ultra-miniature castellated package
  • AEC-Q200 compliant option
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RV-3149-C3
3.7 x 2.5 x 0.9mm

RV-3149-C3

RTC SPI Bus

The RV-3149-C3 features superb timing stability, temperature compensation and SPI bus interface in a miniature 3.7 x 2.5mm surface mount package with side castellations. Wide operating temperature ranges of -40 to +125ºC are available as is AEC-Q200 qualification and full PPAP documentation on request.

  • 1.0Hz ~ 32.768kHz
  • Temperature compensated accuracy
  • Ultra-miniature castellated package
  • AEC-Q200 compliant option
VIEW PRODUCT
A 8-pad 3.2x1.5 Golledge Real Time Clock
3.2 x 1.5 x 0.8mm

RV-4162-C7

RTC I2C bus

The RV-4162-C7 ultra-miniature RTC module is perfect for high volume applications where you need an all-in-one solution to help with space saving and procurement costs. The tiny 3.2 x 1.5mm footprint enables additional design space and, along with wide operating voltage range and good stability at room temperature, the RV-4162-C7 also features I2C bus interface, standard clock and calendar functionality, alarm setting and a watchdog function. This product was previously named RV4162C7.

  • 1.0Hz ~ 32.768kHz
  • Ultra-miniature ceramic SMD RTC module
  • Compliant with I2C-Bus interface (400kHz)
  • AEC-Q200 compliant option
VIEW PRODUCT
A 8-pad 3.2x1.5 Golledge Real Time Clock
3.2 x 1.5 x 0.8mm

RV-8063-C7

Low Power SPI bus RTC

The RV-8063-C7 has low current consumption of just 190nA typical and is operable over wide voltage range of 0.9V to 5.5V making it a highly cost effective all-in-one real time clock solution,

This RTC module also features a miniature surface mount package of 3.2 x 1.5mm, excellent real time clock functionality including alarm setting, timer, SPI interface, and automatic leap year calculation from 2000 to 2099 in addition to standard clock and calendar functionality including internal power-on reset (POR). 

  • 1.0Hz ~ 32.768kHz
  • Low Power RTC module
  • 3 wire SPI-bus (7 Mbit/s)
  • AEC-Q200 compliant option
VIEW PRODUCT
A 8-pad 3.2x1.5 Golledge Real Time Clock
3.2 x 1.5 x 0.8mm

RV-8263-C7

Low Power I2C bus RTC

Providing a highly cost effective all-in-one real time clock solution, the RV-8263-C7 has low current consumption of just 190nA typical and is operable over wide voltage range of 0.9V to 5.5V.

The RV-8263-C7 also features a miniature surface mount package with tiny 3.2 x 1.5mm package, excellent real time clock functionality including alarm setting, timer, I2C interface, and automatic leap year calculation from 2000 to 2099 in addition to standard clock and calendar functionality. This product was previously named RV8263C7.

  • 1.0Hz ~ 32.768kHz
  • Low Power RTC module
  • Compliant with I2C-Bus interface (400kHz)
  • AEC-Q200 compliant option
VIEW PRODUCT
A Golledge 10-pad 3.7x2.5 package Real Time Clock
3.7 x 2.5 x 0.9mm

RV-8523-C3

RTC I2C bus Low Power

Ideal for engineers who require low power at supply voltages down to 1.2V, the RV-8532-C3 with I2C bus interface consumes current of only 130nA in time-keeping mode. Encased within a miniature 3.7 x 2.5mm footprint package, the RV-8523-C3 also features good shock and vibration performance and is available with AEC-Q200 qualification and full PPAP documentation on request. This product was previously named RV8523C3.

  • 1.0Hz ~ 32.768kHz
  • Ultra low power consumption (130nA)
  • AEC-Q200 compliant option
  • Compliant with I2C-Bus interface (400kHz)
VIEW PRODUCT
A 10-pad 5032 Golledge Real Time Clock package
5.0 x 3.2 x 1.2mm

RV-8564-C2

RTC I2C bus

Due to technology improvements the RV-8564-C2 is no longer recommended for new designs but is suitable as a drop in replacement for existing designs within a 5.0 x 3.2mm footprint which require I2C bus 2-wire serial interface and current consumption of up to 250nA. For new designs that require low power consumption please consider the smaller and more competitive RV-1805-C3 or RV-4162-C7 for designs where highly competitive pricing is paramount.

  • 1.0Hz ~ 32.768kHz
  • AEC-Q200 compliant option
  • Compliant with I2C-Bus interface (400kHz)
  • Built in crystal for adjustment-free operation
VIEW PRODUCT
A Golledge 10-pad 3.7x2.5 package Real Time Clock
3.7 x 2.5 x 0.9mm

RV-8564-C3

RTC I2C bus

Due to technology improvements the RV-8564-C3 with I2C bus interface is no longer recommended for new designs but is fully available for existing design-ins. For new designs that require low power consumption please consider the smaller and more competitive RV-1805-C3 or RV-4162-C7 for designs where highly competitive pricing is paramount. This product was previously named RV8564C3.

  • 1.0Hz ~ 32.768kHz
  • Sub miniature size
  • AEC-Q200 compliant option
  • Compliant with I2C-Bus interface (400kHz)
VIEW PRODUCT
Golledge custom RTC module package

Custom RTC

Specify your custom Golledge RTC module here

If you can't find the real time clock product you're looking for within our product search don't worry, you can let us know your RTC requirements here. Alternatively, get in touch with our expert technical team on +44 1460 256 100 for a fast solution to your query.

  • Can't find the RTC module you need within our listed range?
  • Tell us your requirements here
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What actually is a real time clock?

An RTC is essentially a digital clock that is found on computerised systems such as laptops, tablets, smartphones, personal computers and really any electronic device that requires accurate time keeping. 

One of the main benefits of RTCs is that they can continue to operate even when the device is powered off. Some RTC modules are powered by an alternate source, such as lithium batteries on or rechargable batteries or supercapacitors.

In most consumer-grade motherboards, the RTC is powered by a single battery, which, if removed, will reset the RTC back to its starting point.

RTC modules contain the clock IC and the tuning fork crystal to provide a self-contained time keeping function.

What are the main benefits of using RTCs?

One of the main benefits of RTCs is their ability to continue operating even when the device is powered off. This ensures that devices always have access to accurate time and can maintain functions like scheduling, logging, and synchronisation.

How do RTCs maintain time when the device is powered off?

RTCs can maintain time when the device is powered off through various methods. Some RTC modules are powered by alternate sources such as lithium batteries, rechargeable batteries, or supercapacitors. These backup power sources ensure that the RTC continues to function even when the main power source is disconnected.

What happens if the battery powering the RTC is removed?

In most consumer-grade motherboards, the RTC is powered by a single battery. If this battery is removed, the RTC will reset to its starting point. It's essential to replace the battery promptly to avoid losing timekeeping functionality.

Are Golledge Electronics RTC modules customisable for specific applications?

Yes, we offer customisable RTC modules tailored to meet the unique requirements of different applications. Our RTC modules feature high-quality components and are designed to deliver accurate and reliable timekeeping performance.

How accurate are Golledge Electronics RTC modules?

Our RTC modules offer high accuracy and precision timekeeping performance. They are designed to meet stringent industry standards for accuracy and stability, ensuring reliable operation in demanding applications.

Can Golledge Electronics provide technical support for RTC modules?

Yes, we offer comprehensive technical support for our RTC modules, including assistance with product selection, integration, and troubleshooting. Our team of experts is committed to ensuring the optimal performance and reliability of your RTC-based systems.

Are Golledge Electronics RTC modules compatible with various platforms and systems?

Yes, our RTC modules are designed to be compatible with a wide range of platforms and systems, including microcontrollers, single-board computers, embedded systems, and industrial automation equipment. They feature standard interfaces and communication protocols for easy integration into existing designs.

How long do Golledge Electronics RTC modules typically last?

Our RTC modules are built to be durable and reliable, with a typical lifespan of several years or more depending on usage and environmental conditions. We use high-quality components and rigorous testing procedures to ensure long-term performance and longevity.

Do Golledge Electronics RTC modules support daylight saving time (DST) adjustments?

Yes, many of our RTC modules support automatic adjustment for daylight saving time (DST) transitions. This feature ensures that the clock automatically updates to reflect changes in local time, helping to maintain accurate timekeeping year-round.

Are Golledge Electronics RTC modules RoHS compliant?

Yes, our RTC modules comply with the Restriction of Hazardous Substances (RoHS) directive, which restricts the use of certain hazardous materials in electronic and electrical equipment. This ensures that our products meet international environmental standards for safety and sustainability.