TCXO Oscillators

TCXO’s (Temperature Compensated Crystal Oscillators) are used in designs that need better temperature stability than what can be offered by XO’s or VCXO oscillators. TCXO Oscillators can achieve stability of less than 1ppm as opposed to a typical crystal of 30ppm.

A wide range of temperature stabilities options are available in TCXO’s, from 5ppm to 50ppb. TCXO oscillators vary in size from the smallest 2.0 x 1.6mm to larger sizes and even TH devices used in military applications.

The key factor to consider when selecting a TCXO is the temperature range over which it operates. -20°C to 70°C is common with -40°C to 85°C a premium especially at tight tolerances.


How do TCXO’s work?


TCXO Oscillators use a compensation network that senses the change in frequency over temperature and creates a near inverse curve. This is used to pull the TCXO back to the nominal frequency. The remaining error we see is the stated stability, e.g. 1ppm over -20°C to 70°C meaning the error from nominal should be no larger over that temperature range.

One of the first types of TCXO compensation was &147direct compensation&148; these devices used a network of components to alter the capacitive load on the crystal to shift the frequency as it naturally changed with temperature. The other type is called the "indirect method", in early models this saw the use of thermistors again that created a temperature dependent voltage. This was used to drive a varactor who’s changing capacitance changed the crystal frequency

Today we see the use of an IC to change the voltage to the varactor, and testing in small temperature steps to confirm the correction (due to differences in the crystal curve). These types are referred to as analog TCXO’s.which are recommended for GPS/GNSS clocking applications; due to small shifts of frequency per °C change they help keep the GPS loop locked as temperature changes.

Digitally controlled TCXOs are also available and these tend to fall into the smaller packages and more cost-effective solutions. These oscillators use internal ADC’s (analog to digital converters) monitoring the temperature but follow the temperature change in digital steps related to the ADC value.
These types are unsuitable for GNSS solutions due to the frequency jumps over temperature.


VCTCXO - Voltage Controlled Temperature Compensated Oscillator


VCTCXO Oscillators have the same features as the TCXO with the added functionality of a voltage controlled function to allow precision tuning of the output frequency. The VCTCXO differentiate themselves by having a VC pad (voltage control) in the oscillator. This input requires an analog voltage that works to control the varactor inside and is normally part of an external PLL that controls the VCTCXO frequency.

You are viewing 1 - 20 of 76 results
Display:
Results per page
20
  • 20
  • 50
  • 100
Price
(Price shown excludes VAT)
Part Details Brand Oscillator Type Output Frequency Frequency Stability Load Capacitance Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Height Dimensions
CTS 32.76 kHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, HCMOS ±5ppm SMDTT32M327K50ITR
  • RS Stock No. 178-2030
  • Brand CTS
  • Mfr. Part No. TT32M327K50ITR
CTS TCXO (Temperature Compensated Crystal Oscillator) 32.76 kHz ±5ppm - SMD HCMOS -40 °C +85 °C 1.4mm 3.28 x 2.5 x 1.4mm
CTS 32.76 kHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, HCMOS ±5ppm SMDTT32M327K50ITR
  • RS Stock No. 178-2699
  • Brand CTS
  • Mfr. Part No. TT32M327K50ITR
CTS TCXO (Temperature Compensated Crystal Oscillator) 32.76 kHz ±5ppm - SMD HCMOS -40 °C +85 °C 1.4mm 3.28 x 2.5 x 1.4mm
Abracon 38.4 MHz Crystal Oscillator, Clipped Sinewave ±0.5ppm SMDASTXR-12-38.400MHZ-514054-T
  • RS Stock No. 171-2356
  • Brand Abracon
  • Mfr. Part No. ASTXR-12-38.400MHZ-514054-T
Abracon - 38.4 MHz ±0.5ppm - SMD Clipped Sinewave -40 °C +85 °C 0.8mm 2.5 x 2 x 0.8mm
TCXO, SMD, 7x5mm, Clipped sine, 10.0MHz TAITIEN XO 10 MHz ±2ppm - SMD Clipped Sinewave -40 °C +85 °C 2mm 7 x 5 x 2mm
TCXO, 3.2x2.5mm, Clipped sine, 12.8MHz TAITIEN XO 12.8 MHz ±1ppm - SMD Clipped Sinewave -30 °C +85 °C 1mm 3.2 x 2.5 x 1mm
RS PRO 24.57 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, HCMOS, TTL ±0.028ppm SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 24.57 MHz ±0.028ppm - SMD HCMOS, TTL -40 °C +85 °C 2mm 7 x 5 x 2mm
IQD 16.384 MHz TCXO, HCMOS ±0.5ppm SMDLFTVXO009915
  • RS Stock No. 146-4002
  • Brand IQD
  • Mfr. Part No. LFTVXO009915
IQD - 16.384 MHz ±0.5ppm 15pF SMD HCMOS -40 °C +85 °C 2mm 7 x 5 x 2mm
RS PRO 12.8 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, HCMOS, TTL ±0.028ppm SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 12.8 MHz ±0.028ppm - SMD HCMOS, TTL -40 °C +85 °C 2mm 7 x 5 x 2mm
RS PRO 20 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, HCMOS, TTL ±0.028ppm SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 20 MHz ±0.028ppm - SMD HCMOS, TTL -40 °C +85 °C 2mm 7 x 5 x 2mm
IQD 20 MHz TCXO, HCMOS ±0.9ppm SMDLFTVXO009907
  • RS Stock No. 146-3963
  • Brand IQD
  • Mfr. Part No. LFTVXO009907
IQD - 20 MHz ±0.9ppm 15pF SMD HCMOS -20 °C +70 °C 2mm 7 x 5 x 2mm
IQD 10 MHz TCXO, HCMOS ±0.5ppm SMDLFTVXO009912
  • RS Stock No. 146-3932
  • Brand IQD
  • Mfr. Part No. LFTVXO009912
IQD - 10 MHz ±0.5ppm 15pF SMD HCMOS -40 °C +85 °C 2mm 7 x 5 x 2mm
IQD 20 MHz TCXO, HCMOS ±0.5ppm SMDLFTVXO009917
  • RS Stock No. 146-3950
  • Brand IQD
  • Mfr. Part No. LFTVXO009917
IQD - 20 MHz ±0.5ppm 15pF SMD HCMOS -40 °C +85 °C 2mm 7 x 5 x 2mm
TCXO, SMD, 7x5mm, Clipped sine, 10.0MHz TAITIEN XO 10 MHz ±1ppm - SMD Clipped Sinewave -30 °C +85 °C 2mm 7 x 5 x 2mm
TAITIEN 26 MHz VCTCXO, Clipped Sinewave ±0.5ppm SMDR0053-T-054-3 TAITIEN - 26 MHz ±0.5ppm 10pF SMD Clipped Sinewave -30 °C +85 °C 1mm 3.2 x 2.5 x 1mm
TAITIEN 30.72 MHz VCTCXO, Clipped Sinewave ±1ppm SMDTCETBDSANF-30.72MHz TAITIEN - 30.72 MHz ±1ppm 10pF SMD Clipped Sinewave -30 °C +85 °C 2mm 7 x 5 x 2mm
IQD 26 MHz TCVCXO Voltage Controlled Oscillator, Clipped Sinewave ±2.5ppm SMDLFTVXO009975
  • RS Stock No. 478-9101
  • Brand IQD
  • Mfr. Part No. LFTVXO009975
IQD TCVCXO 26 MHz ±2.5ppm - SMD Clipped Sinewave -30 °C +80 °C 2mm 7 x 5 x 2mm
RS PRO 10 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, CMOS SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 10 MHz - - SMD CMOS -20 °C +70 °C 0.95mm 2.5 x 2 x 0.95mm
RS PRO 32 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, CMOS SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 32 MHz - - SMD CMOS -20 °C +70 °C 0.95mm 2.5 x 2 x 0.95mm
RS PRO 40 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, CMOS SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 40 MHz - - SMD CMOS -20 °C +70 °C 0.95mm 2.5 x 2 x 0.95mm
RS PRO 40 MHz TCXO (Temperature Compensated Crystal Oscillator) Crystal Oscillator, Clipped Sinewave ±1.5ppm SMD RS Pro TCXO (Temperature Compensated Crystal Oscillator) 40 MHz ±1.5ppm - SMD Clipped Sinewave -40 °C +85 °C 0.85mm 2 x 1.6 x 0.85mm
Check Our Stock Volumes
Enter the quantity you require and click 'Check'.
. This information is updated daily so availability may vary at time of order placement.
RS Stock No:
I'm looking for 
Compare list full
You can only compare 8 products at a time

View or remove your products on your Compare page
You are viewing 1 - 20 of 76 results