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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68AH9632

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Each
1+
$18.020
10+
$16.840
25+
$15.660
92+
$14.470
138+
$13.920
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Min: 1 / Mult: 1
32.768kHz
7.5ppm
SOIC
Square Wave
5V
DS32KHZ Series
-40°C
85°C
43AC3344

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Each (Supplied on Cut Tape)
Cut Tape
1+
$24.510
10+
$22.360
25+
$21.540
50+
$20.780
100+
$20.120
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
73AJ1530

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Each (Supplied on Cut Tape)
Cut Tape
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$6.370
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$5.580
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$5.330
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$5.080
100+
$4.880
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Min: 1 / Mult: 1
12MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ASTX-H12 Series
-30°C
75°C
73AJ1522

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Each (Supplied on Cut Tape)
Cut Tape
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$6.760
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$5.900
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$5.630
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$5.360
100+
$5.150
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Min: 1 / Mult: 1
26MHz
2.5ppm
SMD, 3.2mm x 2.5mm
HCMOS
3.3V
ASTX-H11 Series
-30°C
75°C
56AJ9437

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
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$3.630
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$3.470
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$3.310
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$3.160
100+
$3.030
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Min: 1 / Mult: 1
38.4MHz
0.5ppm
SMD, 2mm x 1.6mm
Clipped Sinewave
-
ATX-13 Series
-40°C
85°C
67AC8621

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Each (Supplied on Cut Tape)
Cut Tape
1+
$132.540
10+
$108.590
Min: 1 / Mult: 1
25MHz
0.1ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5356
-40°C
85°C
26AJ5818

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Each (Supplied on Cut Tape)
Cut Tape
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$4.060
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$3.560
25+
$3.410
50+
$3.240
100+
$3.120
More Pricing...
Min: 1 / Mult: 1
40MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
68AC5083

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Date/Lot Code

Each
1+
$15.030
10+
$13.990
25+
$12.940
92+
$11.900
138+
$11.420
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Min: 1 / Mult: 1
32.768kHz
7.5ppm
SOIC
Square Wave
5V
DS32kHz
0°C
70°C
73AJ1524

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$6.370
10+
$5.580
25+
$5.330
50+
$5.080
100+
$4.880
More Pricing...
Min: 1 / Mult: 1
27MHz
2.5ppm
SMD, 3.2mm x 2.5mm
HCMOS
3.3V
ASTX-H11 Series
-30°C
75°C
56AJ9429

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$3.950
10+
$3.470
25+
$3.310
50+
$3.160
100+
$3.030
More Pricing...
Min: 1 / Mult: 1
32MHz
0.5ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
-
ATX-11 Series
-40°C
85°C
56AJ9433

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
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$4.150
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$3.590
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$3.370
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$3.150
100+
$3.050
More Pricing...
Min: 1 / Mult: 1
32MHz
0.5ppm
SMD, 2.5mm x 2mm
Clipped Sinewave
-
ATX-12 Series
-40°C
85°C
60AJ3674

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Each (Supplied on Full Reel)
Full Reel
1000+
$2.490
2000+
$2.420
4000+
$2.350
6000+
$2.330
Min: 1000 / Mult: 1000
25MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
38AC0953

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Each (Supplied on Cut Tape)
Cut Tape
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$12.260
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$10.760
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$10.350
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$9.910
100+
$9.500
More Pricing...
Min: 1 / Mult: 1
32.768kHz
7.5ppm
SOIC
Square Wave
5V
DS32kHz
0°C
70°C
68AH9631

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Each
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$22.090
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$20.300
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$18.500
66+
$17.950
110+
$17.380
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Min: 1 / Mult: 1
32.768kHz
7.5ppm
SMD, 21.84mm x 11.68mm
Square Wave
5V
DS32KHZ Series
-40°C
85°C
56AJ9425

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
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$3.950
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$3.470
25+
$3.310
50+
$3.160
100+
$3.030
More Pricing...
Min: 1 / Mult: 1
26MHz
0.5ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
-
ATX-11 Series
-40°C
85°C
73AJ1525

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Date/Lot Code

Each (Supplied on Full Reel)
Full Reel
1000+
$4.200
2000+
$4.120
4000+
$4.020
Min: 1000 / Mult: 1000
27MHz
2.5ppm
SMD, 3.2mm x 2.5mm
HCMOS
3.3V
ASTX-H11 Series
-30°C
75°C
56AJ9427

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
$3.120
10+
$3.030
25+
$3.020
50+
$3.020
100+
$2.920
Min: 1 / Mult: 1
27MHz
0.5ppm
SMD, 3.2mm x 2.5mm
Clipped Sinewave
-
ATX-11 Series
-40°C
85°C
73AJ1539

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Date/Lot Code

Each
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$41.800
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$39.660
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$37.520
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$36.210
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$34.910
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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
67AC8613

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Each (Supplied on Cut Tape)
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$65.140
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$65.100
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$65.030
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$64.940
100+
$64.900
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Min: 1 / Mult: 1
20MHz
0.5ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5155
-40°C
85°C
67AC8619

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Each (Supplied on Cut Tape)
Cut Tape
1+
$106.020
Min: 1 / Mult: 1
10MHz
0.1ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5356
-40°C
85°C
67AC8616

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Each (Supplied on Cut Tape)
Cut Tape
1+
$61.320
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$60.050
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$60.040
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$59.020
100+
$57.360
Min: 1 / Mult: 1
25MHz
0.5ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5156
-40°C
85°C
26AJ5815

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Each (Supplied on Cut Tape)
Cut Tape
1+
$3.410
10+
$3.230
25+
$3.060
50+
$2.880
Min: 1 / Mult: 1
24MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
60AJ3671

RoHS

Each (Supplied on Full Reel)
Full Reel
1000+
$2.420
2000+
$2.380
4000+
$2.330
6000+
$2.270
Min: 1000 / Mult: 1000
12MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
26AJ5813

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Each (Supplied on Cut Tape)
Cut Tape
1+
$3.600
10+
$3.150
25+
$3.030
50+
$2.910
100+
$2.810
More Pricing...
Min: 1 / Mult: 1
12MHz
2.5ppm
SMD, 2.5mm x 2mm
HCMOS
3.3V
ECS-TXO-2520 Series
-40°C
85°C
67AC8625

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
$139.560
10+
$132.690
Min: 1 / Mult: 1
100MHz
0.1ppm
SMD, 5mm x 3.2mm
LVCMOS
3.3V
SiT5357
-40°C
85°C
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