Golledge HCD 50x40 OCXO


Fast Warm Up OCXO with Sine Output and US Pin-out

  • Fast warm up
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
  • Standard US footprint & pin-out
  • Custom options available
Configurable Options
ParameterOption Code
Ageing per day (at despatch)
Temperature stability
Operating temperature range
Output waveform
Supply voltage (VDD)
Close-in phase noise (@ 5.0MHz)
Close-in phase noise (@ 10.0MHz)
Quantity / Special Request

Please specify the quantity you require below.

The HCD685 is supplied in boxes. 6 pcs per box is the maximum box size for this product.

Product Description

The HCD685 OCXO provides features standard US pin-out package and provides sine wave output with exceptionally tight temperature stability, including options as good as ±1ppb. Available at frequencies from 5.0MHz to 20.0MHz and with optional supply voltage, the HCD685 oven controlled oscillator also features excellent ageing specifications, with options as good as <2 x 10-10 per day available, good close-in phase noise specifications, for example -150dBc/Hz @ 10Hz when operating at 5.0MHz, and fast warm up times.

Frequency range 5.0 ~ 20.0MHz
Dimensions 50.8 x 50.8 x 24.5mm
Frequency stability < 1x10-7 per year (option D)
< 2x10-8 per year (option F)
< 1x10-9 per 10% change in VDD
< 5x10-10 per 10% change in load
Storage temperature range -40 to +90°C
Frequency adjustment ±5x10-7 (typ) over +0.5 to +7.0V
(sufficient for 10 years ageing min)
Stabilised +7.0V supply provided
Power consumption 10.0W max at switch on
1.3W typ when stabilised at 25°C
Warm up < 1x10-8 after 2.25mins at +25°C
Allan deviation (ADEV), 1 sec < 5x10-13 over 1 sec (5.0MHz)
< 1x10-12 over 1 sec (10.0MHz)
Far-out phase noise (all freqs) < -155 dBc/Hz @ 1kHz
< -157 dBc/Hz @ 10kHz
< -157 dBc/Hz @ 100kHz
Harmonics < -30dB wrt carrier
Package Drawing
Package footprint and pad configuration drawing for the Golledge HCD 51x51 OCXO showing full dimensions.
Ordering Information

To request a quotation for the HCD685 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

Material Composition

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