The Industry Standard for Stability and Versatility for Wearable Technology and More

Boasting low ESR and high energy savings, ECS Inc. offers the world’s smallest quartz tuning fork in the passive components industry. SMD tuning forks resonating at 32.768 kHz are ideal for wearable technology, IoT applications, drug-delivery devices and industrial applications. Circuit packages as small as 1.2 mm x 1.00 mm with low-profile component heights are available. A wide variety of temperature ranges are available, with options up to +105°C.

32.768 KHz Tuning Forks was last modified: September 23rd, 2022 by ECS Inc.
Support DocsTypePackage
Package SizeFrequencyToleranceOperating
ECX-34RRECX-34RR Datasheet
Support Docs
kHz Crystal34RR3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-31BECX-31B Datasheet
Support Docs
kHz Crystal34B3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-306XECX-306X Datasheet
Support Docs
kHz Crystal17X8.00mm x 3.80mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-12RRECX-12RR Datasheet
Support Docs
kHz Crystal12RR2.00mm x 1.20mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-12RECX-12R Datasheet
Support Docs
kHz Crystal12R2.00mm x 1.20mm32.768 kHz±20ppm-40°C ~ 85°C
ECS-31XECS-31X Datasheet
Support Docs
kHz Crystal13X2.10mm x 6.20mm30 kHz ~ 150 kHz±30ppm-10°C ~ 60°C
CDX-1082CDX-1082 Datasheet
Support Docs
kHz Crystal122.00mm x 1.20mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-71ECX-71 Datasheet
Support Docs
kHz Crystal387.00mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-49ECX-49 Datasheet
Support Docs
kHz Crystal494.10mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-39ECX-39 Datasheet
Support Docs
kHz Crystal394.90mm x 1.80mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-34QECX-34Q Datasheet
Support Docs
kHz Crystal34Q3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 125°CAEC-Q200
ECX-34GECX-34G Datasheet
Support Docs
kHz Crystal34G3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-16RECX-16R Datasheet
Support Docs
kHz Crystal16R1.60mm x 1.00mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-16ECX-16 Datasheet
Support Docs
kHz Crystal161.60mm x 1.00mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-12QECX-12Q Datasheet
Support Docs
kHz Crystal12Q2.00mm x 1.20mm32.768 kHz±20ppm-40°C ~ 125°CAEC-Q200
ECX-1210BECX-1210B Datasheet
Support Docs
kHz Crystal1210B1.20mm x 1.00mm32.768 kHz±20ppm-40°C ~ 105°C
ECX-1210ECX-1210 Datasheet
Support Docs
kHz Crystal12101.20mm x 1.00mm32.768 kHz±20ppm-40°C ~ 85°C
CDX-1293CDX-1293 Datasheet
Support Docs
kHz Crystal34B3.20mm x 1.50mm32.768 kHz±5ppm-40°C ~ 85°C
ECX-34SECX-34S Datasheet
Support Docs
kHz Crystal34S3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 125°C
ECX-34RECX-34R Datasheet
Support Docs
kHz Crystal34R3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
ECX-12ECX-12 Datasheet
Support Docs
kHz Crystal122.00mm x 1.20mm32.768 kHz±20ppm-40°C ~ 85°C
ECS-3X8XECS-3X8X Datasheet
Support Docs
kHz Crystal8X3.10mm x 8.20mm32.768 kHz±20ppm-10°C ~ 60°C
ECS-2X6XECS-2X6X Datasheet
Support Docs
kHz Crystal13X2.10mm x 6.20mm32.768 kHz±20ppm-10°C ~ 60°C
ECS-1x5XECS-1x5X Datasheet
Support Docs
kHz Crystal14X1.50mm x 5.10mm32.768 kHz±20ppm-10°C ~ 60°C
ECS-2×6-FLXECS-2×6-FLX Datasheet
Support Docs
kHz Crystal13FLX2.00mm x 6.10mm32.768 kHz±20ppm-40°C ~ 85°C
CDX-1128CDX-1128 Datasheet
Support Docs
kHz Crystal34B3.20mm x 1.50mm32.768 kHz±20ppm-40°C ~ 85°C
CDX-1074CDX-1074 Datasheet
Support Docs
kHz Crystal122.00mm x 1.20mm32.768 kHz±20ppm-40°C ~ 85°C

Why the 32.768 kHz Output Frequency?

To understand why this specific frequency was chosen, you have to understand that a crystal’s frequency is determined by its size and shape. You must also know that one Hertz equals one second. So, a one-Hertz crystal would precisely track one second at a time. Unfortunately, a one-Hertz crystal would be so large that it would be better suited in, say, Big Ben, as opposed to a wristwatch. This is obviously impractical for many reasons.

Enter the precise frequency of a 32.768 kHz crystal. When built into a watch, a 32.768 kHz crystal can have its characteristic frequency split using a toggle flip-flop, or a T flip-flop. This T flip-flop can cut the frequency of the quartz crystal in half. Therefore, by following some simple arithmetic, one could connect 15 T flip-flops in an uninterrupted sequence, making the output frequency produced by the 32.768 kHz crystal is exactly one Hertz. This is why it is referred to as a timing solution.

It’s no secret that quartz crystals offer the best option for precise time recording. Since the boom of quartz watches in the 1970s, crystals have been the only choice for timing solutions. By installing a quartz crystal and using an accompanying energy source to make the quartz vibrate, watch manufacturers were able to keep track of time far more accurately than the mechanical systems of old.

Advantages of 32.768 kHz Tuning Fork Crystals

Low Current Consumption
Tuning fork crystals inherently consume less power in an integrated circuit, reducing the overall power consumption for both dynamic and static power. This is ideal for many electronics that aim for exceptional battery life.

Less Temperature Dependency
Since the structure and density of quartz crystals varies with temperature, frequency deviations can occur. To combat this, ECS Inc.’s team of engineers can create AT cut quartz blanks with specific angled cuts to offset this deviation. This results in a more precise and reliable timing solution, and makes the component much less dependent on temperature.

Most Accurate Precision
ECS Inc.’s quartz crystal tuning forks, particularly those found in our temperature-compensated crystal oscillators (TXCOs), are some of the most precise real-time clocks available. Thanks to precise temperature compensation in this particular type of component, the frequency stability is unmatched.

Because 32.768 kHz crystals are optimized for low power, take up relatively little space on the circuit board and are the most-used component in watches and other timing devices, their cost is significantly lower than other crystal components, particularly in high volumes.

Electronic Component Solutions to Fit Your Design

Get in touch with a sales representative if you need more information about 32.768 kHz crystals or have questions about a specific requirement in your application design. Contact the ECS engineering team at for assistance with products, board respins and any additional questions. Refer to the ECS Inc. online resource library for more specifications and information about products and applications.

Visit the Resource Library