Golledge HCD350 series OCXO


5V Tight Stability OCXO with CMOS/TTL Output

  • Temperature stability down to 5ppb
  • Single 5V oven & oscillator supply
  • Compact package
  • 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 HCD351 is supplied in boxes. 10 pcs per box is the maximum box size for this product.

Product Description

The HCD351 OCXO features CMOS/TTL compatible output, and exceptionally tight temperature stability options as tight as ±5ppb.

In addition to extremely tight temperature stability the HCD351 also features very low phase noise specifications, with 10.0MHz performance producing phase noise of -155dBc/Hz @ 10kHz.

The HCD350 also features excellent ageing characteristics, and is available with single 5V oven and oscillator supply at frequencies of 5.0 ~ 20.0MHz.

Frequency range 5.0 ~ 20.0MHz
Dimensions 36.1 x 27.2 x 19.4mm
Frequency stability < ±5x10-8 per year
< ±1x10-9 per 10% change in VDD
Short term stability < ±1x10-11 over 1 sec
Storage temperature range -40 to +90°C
Output waveform CMOS / TTL compatible
Frequency adjustment ±5x10-7 (typ) over +0.5 to +4.0V
(sufficient for 10 years ageing min)
Stabilised +4.0V supply provided
Power consumption 5.0W max at switch on
1.2W typ when stabilised at 25°C
Warm up < ±2x10-8 after 8mins at +20°C
Phase noise (@ 10.0MHz) < -120 dBc/Hz @ 10Hz
< -130 dBc/Hz @ 100Hz
< -150 dBc/Hz @ 1kHz
< -155 dBc/Hz @ 10kHz
< -155 dBc/Hz @ 50kHz
Harmonics < -30dB wrt carrier
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 and pad configuration drawing for the Golledge HCD300 series OCXOs showing full dimensions.
Ordering Information

To request a quotation for the HCD351 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.

CAD Models

Our HCD351 is included in the following design libraries. Click to download the library of your choice.

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