Golledge 36.0 x 27.0 x 15.0mm OCXO


Very High Frequency OCXO with Ultra-low Phase Noise and CMOS Output

  • -160dBc/Hz noise floor
  • Frequencies up to 100MHz
  • No multiplier
  • Standard European IEC CO-08 pin-out
  • Custom options available
Configurable Options
ParameterOption Code
Ageing per day (at despatch)
Temperature stability
Operating temperature range
Supply voltage (VDD)
Quantity / Special Request

Please specify the quantity you require below.

The HCD381 is supplied in boxes. 10 pcs per box is the maximum box size for this product.

Product Description

Featuring CMOS/TTL output, the HCD381 oven controlled oscillator is available up to very high frequency of 100MHz with ultra-low phase noise.

The internal oscillator within the HCD381 has been specifically designed not to include multiplication, ensuring ultra-low phase noise performance down to -160dBc/Hz @10kHz, even at very high frequencies. 

This OCXO also features excellent temperature stability, good frequency adjustment (covering 10 years ageing minimum), and offers a choice of supply voltages and operating temperature ranges. 

Frequency range 30.0 ~ 100MHz
Dimensions 36.1 x 27.2 x 15.5mm
Frequency stability < 1 to 5x10-7 per year
< 5x10-9 per 10% change in VDD
Storage temperature range -40 to +90°C
Output waveform CMOS / TTL compatible
Frequency adjustment ±5x10-7 (typ) over +0.5 to +6.0V
(sufficient for 10 years ageing min)
Stabilised +6.0V supply provided
Power consumption 4.5W max at switch on
1.0W typ when stabilised at +25°C
Warm up < 5x10-8 after 10mins at +25°C
Allan deviation (ADEV), 1 sec < 2x10-11
Phase noise (@ 50.0MHz) < -75 dBc/Hz @ 1Hz
< -105 dBc/Hz @ 10Hz
< -135 dBc/Hz @ 100Hz
< -150 dBc/Hz @ 1kHz
< -160 dBc/Hz @ 10kHz
< -160 dBc/Hz @ 50kHz
Shock (IEC 68-2-27 Test Ea) 50g for 11ms
Vibration (IEC 68-2-06 Test Fc) 10-55Hz, 1.5mm. 55-500Hz, 10g
Package Drawing
Package footprint drawing for the Golledge HCD300 series pcb mount OCXO.
Ordering Information

To request a quotation for the HCD381 please use the configurable options form to choose the options you require and then submit your configured product to our team. Our expert advisers are always happy to help with your requirements and can be contacted on +44 1460 256 100 or at sales@golledge.com.

Following product selection you will be issued with a seven character Golledge part number. Your Golledge part number is the internationally accepted Golledge manufacturing part number (MPN) that should be used for all project documentation, including bills of materials (BoMs) and purchase orders.

If you have any queries regarding any of our documentation our dedicated sales team will be happy to help.

Handling & Storage

ESD-HBM-1A Human Body Model (HBM) 1A (250V to <500V)

MSL1 Moisture Sensitivity Level (MSL): 1 (or not applicable)


Solder sealed metal can


PbFree Lead-free (< 0.1% by weight )

RoHS compliant with no exemptions RoHS compliant with no exemptions. See our declaration

REACH REACH compliant. See our statement

Conflict Minerals Statement Free of conflict minerals. See our declaration

Halogen Free Statement Free of Halogens. See our declaration

Ozone Depletion Statement Free of Ozone-depleting substances. See our declaration