Temperature Compensated Crystal Oscillators

Superior Temperature Stability and Versatile Circuit Fabrication Options

A temperature compensated crystal oscillator, or TXCO, is one of the most common types of crystal oscillators, and is generally used for network engineering designs such as GPS, wireless, sonet, fiber channel, wifi, server and storage applications. Crystal oscillators offer a variety of benefits in any use, but TCXOs in particular are best suited for applications that require stable, consistent output frequencies over a wide temperature range. ECS Inc. offers a wide TCXO catalog with kHz and MHz options in industry standard packages with HCMOS, clipped sine wave, LVPECL and LVDS outputs available.

TCXOs was last modified: May 20th, 2024 by Abbie Raphael
Part
Number
Support DocsTypePackage SizeSupply
Voltage
OutputFrequencyStabilityOperating
Temperature
ECS-TXO53-S3ECS-TXO53-S3 Datasheet
Support Docs
TCXO5.00mm x 3.20mm3.3VHCMOS10 MHz ~ 52 MHz±280ppb-40°C ~ 85°C
ECS-TXO-3225MVECS-TXO-3225MV Datasheet
Support Docs
TCXO3.20mm x 2.50mm1.8V,
2.5V,
3.0V,
3.3V
HCMOS8 MHz ~ 60 MHz±2.5ppm-30°C ~ 85°C
ECS-TXO-25CSMV-ACECS-TXO-25CSMV-AC Datasheet
Support Docs
TCXO2.50mm x 2.00mm1.8V,
2.5V,
3.0V,
3.3V
Analog Compensated Clipped Sine Wave10 MHz ~ 52 MHz±0.5ppm-30°C ~ 85°C
VC-TXO-39SMXVC-TXO-39SMX Datasheet
Support Docs
TCXO11.40mm x 9.60mm3.0VClipped Sine Wave10 MHz ~ 19.44 MHz±2.5ppm-30°C ~ 75°C
ETXO-PETXO-P Datasheet
Support Docs
TCXO3.20mm x 2.50mm2.5V,
3.3V
LVPECL10 MHz ~ 1500 MHz±2.5ppm-30°C ~ 85°C
ETXO-LETXO-L Datasheet
Support Docs
TCXO3.20mm x 2.50mm2.5V,
3.3V
LVDS10 MHz ~ 1500 MHz±2.5ppm-30°C ~ 85°C
ETXO-HETXO-H Datasheet
Support Docs
TCXO3.20mm x 2.50mm2.5V,
3.3V
HCMOS10 MHz ~ 250 MHz±2.5ppm-30°C ~ 85°C
ECS-TXO32-S3ECS-TXO32-S3 Datasheet
Support Docs
TCXO3.20mm x 2.50mm3.3VClipped Sine Wave9.6 MHz ~ 50 MHz±280ppb-40°C ~ 85°C
ECS-TXO-5032ECS-TXO-5032 Datasheet
Support Docs
TCXO5.00mm x 3.20mm3.3VHCMOS6.4 MHz ~ 38.4 MHz±2.5ppm-30°C ~ 85°C
ECS-TXO-32CSMVECS-TXO-32CSMV Datasheet
Support Docs
TCXO3.20mm x 2.50mm1.8V,
2.5V,
3.0V,
3.3V
Clipped Sine Wave10 MHz ~ 52 MHz±1ppm,
±2.5ppm,
±500ppb
-40°C ~ 85°C
ECS-TXO-3225ECS-TXO-3225 Datasheet
Support Docs
TCXO3.20mm x 2.50mm3.3VHCMOS8.192 MHz ~ 40 MHz±2.5ppm-30°C ~ 85°C
ECS-TXO-25CSMVECS-TXO-25CSMV Datasheet
Support Docs
TCXO2.50mm x 2.00mm1.8V,
2.5V,
3.0V,
3.3V
Clipped Sine Wave10 MHz ~ 52 MHz±1ppm,
±2ppm,
±500ppb
-40°C ~ 85°C,
-30°C ~ 85°C,
-20°C ~ 70°C
ECS-TXO-2520MVECS-TXO-2520MV Datasheet
Support Docs
TCXO2.50mm x 2.00mm1.8V,
2.5V,
3.0V,
3.3V
HCMOS10 MHz ~ 60 MHz±2.5ppm-40°C ~ 85°C,
-30°C ~ 85°C
ECS-TXO-2520ECS-TXO-2520 Datasheet
Support Docs
TCXO2.50mm x 2.00mm2.5V,
3.0V,
3.3V
HCMOS3.2 MHz ~ 55 MHz±2.5ppm-40°C ~ 85°C
ECS-TXO-20CSMV4ECS-TXO-20CSMV4 Datasheet
Support Docs
TCXO2.00mm x 1.60mm1.8V,
2.5V,
3.0V,
3.3V
Clipped Sine Wave10 MHz ~ 52 MHz±0.5ppm,
±1.5ppm,
±2.5ppm
-30°C ~ 75°C,
-30°C ~ 85°C,
-40°C ~ 85°C
ECS-TXO-20CSMVECS-TXO-20CSMV Datasheet
Support Docs
TCXO2.00mm x 1.60mm1.8V,
2.5V,
3.0V,
3.3V
Clipped Sine Wave10 MHz ~ 52 MHz±500ppb,
±1ppm,
±2.5ppm
-30°C ~ 85°C
ECS-TXO-20CSMV-ACECS-TXO-20CSMV-AC Datasheet
Support Docs
TCXO2.00mm x 1.60mm1.8V,
2.5V,
3.0V,
3.3V
Analog Compensated Clipped Sine Wave10 MHz ~ 52 MHz±0.5ppm-30°C ~ 85°C
ECS-TXO-2016MVECS-TXO-2016MV Datasheet
Support Docs
TCXO2.00mm x 1.60mm1.8V,
2.5V,
3.0V,
3.3V
HCMOS10 MHz ~ 60 MHz±2.5ppm-40°C ~ 85°C
ECS-TXO-2016ECS-TXO-2016 Datasheet
Support Docs
TCXO2.00mm x 1.60mm1.8V,
2.5V,
3.0V,
3.3V
HCMOS9.5 MHz ~ 60 MHz±2.5ppm-40°C ~ 85°C
ECS-327TXOECS-327TXO Datasheet
Support Docs
TCXO3.28mm x 2.50mm2.5V,
3.0V,
3.3V,
5.0V
HCMOS32.768 kHz±5ppm-40°C ~ 85°C
ECS-327TXO-2012ECS-327TXO-2012 Datasheet
Support Docs
TCXO2.00mm x 1.20mm2.5V,
3.0V,
3.3V
HCMOS32.768 kHz±5ppm-40°C ~ 85°C

How Does a TCXO Work?

A TCXO is a crystal oscillator that contains a temperature-sensitive reactive circuit in its oscillation loop that compensates for inherent temperature variations that occur when a crystal oscillator is in use. Typically, the functionality of a TCXO relies on five primary functional blocks, each of which are critical to the accuracy of a TCXO. These blocks are as follows:

Controlling Signal Generator
The controlling signal generator is the gateway to the heart of a TCXO. Thanks to the help of a thermistor, the controlling signal generator registers changes in the ambient temperature, and, using a predefined reference voltage, calculates a proportional temperature voltage, followed by a controlling voltage. Without this piece, the circuit won’t even know there’s been a fluctuation in the operating temperature.

Pulling Network
Next is the pulling network. The pulling network uses the controlling voltage output from the controlling signal generator to correct the oscillator’s temperature-based frequency deviation. Similar to a VCXO, a varactor diode to accomplish this.

Core Oscillator
The core oscillator is just as it sounds – it is the standard crystal oscillator circuit that’s providing the heartbeat of the entire system.

Voltage Regulator
Next up is the voltage regulator, which could be thought of as the bodyguard for the TCXO. It controls the external voltage and prevents voltage fluctuations within the unit caused by ambient sources (such as noise produced by the power supply).

Output Buffer
Finally, the output buffer comes into play as the second bodyguard. It protects the crystal oscillator from any changes in external load. Because of this, the accuracy of the resonant frequency output wouldn’t be affected by output-load capacitance.

Find the Best TCXOs and Other Passive Components from ECS Inc.

When you buy from ECS Inc., you can rest assured knowing you’re buying some of the best electrical components on the global market. Our TCXOs continuously monitor temperature output, and will adjust the output frequency to maintain tight stabilities. This allows TCXOs to offer a very stable timing source over the rated temperature range. Our TCXO products are offered in both surface mount device (SMD) and through-hole circuit packaging configurations.

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Get Assistance With Custom Electronic Component Solutions to Fit Your Design

Contact us today if you need more information about our temperature compensated crystal oscillators, or have questions about a specific requirement in your application design. Our team of product experts are ready to help you create a custom timing solution that fits your exact specifications. To learn more about our products and their applications, you also can browse our extensive online resource library.

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