Temperature Compensated - TCXO Oscillators:

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We offer a wide range of temperature compensated crystal oscillators for applications demanding a high stability, precision frequency source within a small space and at a reasonable cost

What are Temperature Compensated Oscillators?

The TCXO, Temperature Compensated Crystal Oscillator (Xtal oscillator), is a form of crystal oscillator used where a precision frequency source is required within a small space and at a reasonable cost.

By applying temperature compensation within the quartz crystal oscillator module, it is possible to considerably improve on the basic performance of the crystal.

Temperature Compensated Oscillators (TCXOs) use a temperature-sensitive reactance circuit in their oscillation loop to compensate for the frequency-temperature characteristics inherent to the crystal unit. This makes them more stable than other types of oscillators and they are used in applications where high stability is required such as in GPS receivers, mobile phones, and other communication equipment.

In view of their usefulness, a wide range of TXCOs is available from many suppliers in a whole variety of packages and mounts (surface, through-hole). Some TCXOs are compatible with the dual in line format used for many through hole mounted integrated circuits.

How to minimise the effects of temperature on the quartz crystal

Although crystal oscillators offer a highly stable form of oscillator, they are nevertheless affected by temperature. The type of crystal cut inside the oscillator can help to minimise the effects of temperature, but they are still affected to some degree.

For a crystal cut known as the AT cut, the drift with temperature can be minimised around normal ambient temperature, but the rate of drift will rise above and below this.

SiTime’s Elite Platform®, Elite X™, and Elite RF™ Super-TCXOs are precision timing solutions with exceptional dynamic performance and rich features. These devices solve deep-rooted timing problems for telecom, RF, networking, edge synchronisation, and precision GNSS applications. By combining tight-stability and low phase noise with the robust package of a ceramic TCXO, Si Time Super-TCXOs replace legacy quartz OCXOs while increasing reliability, lowering power, and reducing size.

Features:

  1. Tight stability (±0.01 ppm to ±2.5 ppm), 1 to 220 MHz
  2. Better dynamic stability than quartz (±0.5 ppb/℃ ∆F/∆T), resistant to airflow and thermal shock
  3. -40℃ to 105℃ operation uniquely enables fan-less outdoor equipment
  4. Low phase noise: -159 dBc/Hz at 10 kHz (19.2 MHz nominal)
  5. Lower power consumption (110 mW, 2.5V) for battery-operated edge equipment
  6. I2C digital frequency tuning eliminates external DAC and sensitivity to board noise
  7. On-chip power supply noise filtering eliminates dedicated LDO
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2850217

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HK$14.140
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HK$11.180
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HK$10.690
250+
HK$10.640
Min: 1 / Mult: 1
32.768kHz
5ppm
SMD, 1.5mm x 0.8mm
LVCMOS
-
SiT1552
-40°C
85°C
2850217RL

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100+
HK$10.690
250+
HK$10.640
Min: 100 / Mult: 1
32.768kHz
5ppm
SMD, 1.5mm x 0.8mm
LVCMOS
-
SiT1552
-40°C
85°C
2096010

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HK$30.550
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HK$22.550
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Clipped Sinewave
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-30°C
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4312726RL

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HK$10.940
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HK$10.360
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HK$9.870
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HK$9.700
Min: 100 / Mult: 1
24MHz
2.5ppm
SMD, 3.2mm x 2.5mm
CMOS
3.63V
FT3MH Series
-40°C
85°C
4312726

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HK$11.350
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HK$9.870
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24MHz
2.5ppm
SMD, 3.2mm x 2.5mm
CMOS
3.63V
FT3MH Series
-40°C
85°C
2908690

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HK$261.650
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HK$257.710
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Min: 1 / Mult: 1
10MHz
0.5ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5155
-40°C
85°C
2908697

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HK$1,186.720
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HK$1,038.380
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HK$860.380
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HK$771.370
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HK$712.040
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Min: 1 / Mult: 1
10MHz
0.1ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5356
-40°C
85°C
2908691

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HK$368.590
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HK$368.340
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HK$367.890
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HK$367.440
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HK$367.190
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Min: 1 / Mult: 1
20MHz
0.5ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5155
-40°C
85°C
2798764

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HK$72.510
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HK$63.630
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HK$58.610
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HK$56.150
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HK$54.910
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32.768kHz
7.5ppm
SOIC
Square Wave
5V
DS32kHz
0°C
70°C
3649636

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HK$22.900
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HK$18.460
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HK$17.200
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HK$16.770
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HK$16.030
Min: 1 / Mult: 1
16MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
2805453RL

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5+
HK$113.630
Min: 10 / Mult: 1
10MHz
0.28ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
3.3V
IQXT-220-1 Series
-40°C
85°C
2798764RL

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HK$63.630
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HK$58.610
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HK$56.150
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HK$54.910
500+
HK$50.970
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Min: 10 / Mult: 1
32.768kHz
7.5ppm
SOIC
Square Wave
5V
DS32kHz
0°C
70°C
2908691RL

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Each (Supplied on Cut Tape)
Re-Reel
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10+
HK$368.340
25+
HK$367.890
50+
HK$367.440
100+
HK$367.190
250+
HK$312.120
Min: 10 / Mult: 1
20MHz
0.5ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5155
-40°C
85°C
2805453

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Each (Supplied on Cut Tape)
Cut Tape
1+
HK$114.990
5+
HK$113.630
Min: 1 / Mult: 1
10MHz
0.28ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
3.3V
IQXT-220-1 Series
-40°C
85°C
2908690RL

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HK$271.760
25+
HK$266.710
50+
HK$261.650
100+
HK$257.710
250+
HK$253.760
Min: 10 / Mult: 1
10MHz
0.5ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5155
-40°C
85°C
2908697RL

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10+
HK$1,038.380
25+
HK$860.380
50+
HK$771.370
100+
HK$712.040
250+
HK$664.560
Min: 10 / Mult: 1
10MHz
0.1ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5356
-40°C
85°C
3649636RL

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HK$17.200
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HK$16.770
500+
HK$16.030
Min: 100 / Mult: 1
16MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
3773423RL

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HK$15.590
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HK$14.230
Min: 100 / Mult: 1
38.4MHz
0.5ppm
SMD, 2mm x 1.6mm
Clipped Sinewave
-
ATX-13 Series
-40°C
85°C
3773429

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Min: 1 / Mult: 1
27MHz
0.5ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
-
ATX-11 Series
-40°C
85°C
3773429RL

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HK$14.280
Min: 100 / Mult: 1
27MHz
0.5ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
-
ATX-11 Series
-40°C
85°C
3773423

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HK$20.470
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HK$14.230
Min: 1 / Mult: 1
38.4MHz
0.5ppm
SMD, 2mm x 1.6mm
Clipped Sinewave
-
ATX-13 Series
-40°C
85°C
3819891

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Min: 1 / Mult: 1
30.72MHz
280ppb
SMD, 7mm x 5mm
LVCMOS
3.3V
AST3TQ-28 Series
-40°C
85°C
4059418RL

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HK$14.720
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HK$14.640
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HK$13.240
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HK$12.890
Min: 100 / Mult: 1
16MHz
2.5ppm
SMD, 3.2mm x 2.5mm
HCMOS
3.3V
ECS-TXO-3225 Series
-30°C
85°C
4059413

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Min: 1 / Mult: 1
25MHz
2.5ppm
SMD, 2mm x 1.6mm
HCMOS
3.3V
ECS-TXO-2016 Series
-40°C
85°C
4059418

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Each (Supplied on Cut Tape)
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100+
HK$14.720
250+
HK$14.640
500+
HK$13.240
More Pricing...
Min: 1 / Mult: 1
16MHz
2.5ppm
SMD, 3.2mm x 2.5mm
HCMOS
3.3V
ECS-TXO-3225 Series
-30°C
85°C
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