6 Nov 2017

EMILY LAWRIE - MARKETING MANAGER

A real-time clock (RTC) module is a single surface mount package that contains a 32.768 kHz tuning fork crystal resonator and a real-time clock IC including oscillation circuitry, clock, calendar, and alarm functions. Both the crystal and IC have been matched to guarantee operation over the widest range of environmental conditions and applications.

When real time clock IC’s are used in combination with separate 32.768 kHz watch style crystals errors in the order of 60 minutes per year can accrue, more if the end product is subjected to wide changes in temperature. All of the Golledge RTC modules featured have been designed to address the rapidly increasing market demand for high accuracy time stamping and total reliability over wide temperature variations. Time stamping accuracy within 1~2 minutes from -40 to +85°C can be expected after one year of operation.

Ultra-low current consumption <130nA, miniature packaging 3.2x1.5x0.8mm, extended operating temperature options -40 to +125°C and automotive qualification according to AEC-Q200 have all been catered for.

Whether you are designing Smart Meters, Data loggers, Industrial Control Equipment, White Goods, Point of Sale terminals, Automotive dash board electronics Golledge has the complete solution to meet your needs. You can find our full range of RTC modules here.

One of the main benefits of using an RTC module is the additional functionality provided by these modules, however, this extra functionality can make comparing models tricky. Below you'll find our quick comparison charts to help make selecting the real time clock module you need easy. First define the interference required and then simply use either the I2C or SPI-bus charts to pick the product you need.

Real Time Clock Modules with I2C Interface

Product Main Feature Dimensions [mm] Time Accuracy Supply VDD [V] Current IDD [nA] TOP [°C] Offset Compensation Temperature Compensation Backup Switch Trickle Charge Event Input RAM [Bytes] EEPROM [Bytes]
 RV4162C7 Standard  3.2x1.5x0.8   ±20ppm @ 25°C  1.0 to 4.4 350  -40 to +85°C  Available            
RV8564C2  Standard  5.0x3.2x1.2  ±20ppm @ 25°C  1.2 to 5.5  250  -40 to +85°C               
RV8564C3  Standard  3.7x2.5x0.9 ±20ppm @ 25°C  1.2 to 5.5  250  -40 to +85°C               
RV8523C3  Ultra Low Power   3.7x2.5x0.9  ±20ppm @ 25°C  1.2 to 5.5  130  -40 to +85°C  Available   Available        
 RV1805C3 Extreme Low Power   3.7x2.5x0.9  ±2ppm @ 25°C (factory calibrated) 1.5 to 3.6  60  -40 to +85°C  Available   Available Available Available 256   
RV3029C2   Temperature compensated DTCXO  5.0x3.2x1.2  Options as good as ±6ppm @ -40 to +85°C  1.3 to 5.5  800  -40 to +125°C    Available Available Available  
RV3029C3  Temperature compensated DTCXO   3.7x2.5x0.9  Options as good as ±6ppm @ -40 to +85°C   1.3 to 5.5  800  -40 to +125°C    Available Available Available  
RV8803C7  Temperature compensated DTCXO   3.2x1.5x0.8  ±3ppm @ -40 to +85°C   1.5 to 5.5  240  -40 to +85°C    Available     Available  

SPI-Bus Interface Real Time Clock Modules

Product Main Feature Dimensions [mm] Time Accuracy Supply VDD [V] Current IDD [nA] TOP [°C] Offset Compensation Temperature Compensation Backup Switch Trickle Charge Event Input RAM [Bytes] EEPROM [Bytes]
 RV2123C2 Ultra low power 5.0x3.2x1.2   ±20ppm @ 25°C 1.1 to 5.5 130 -40 to +85°C  Available            
RV3049C2  Temperature compensated DTCXO  5.0x3.2x1.2  Options as good as ±6ppm @ -40 to +85°C  1.3 to 5.5  800  -40 to +125°C    Available Available Available    8
RV3049C3  Temperature compensated DTCXO 3.7x2.5x0.9 Options as good as ±6ppm @ -40 to +85°C  1.3 to 5.5  800  -40 to +125°C    Available Available Available