MercuryX™ High-Performance OCXO

Issue: B, 7 May 2024

Specifications are subject to change without notice.

Copyright © 2023 to 2024 Rakon Limited. All rights reserved

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ROM1490X

The ROM1490X is a Stratum 3E compliant OCXO which delivers ±3 ppb stability over an extended operating temperature range

of -40 to 95°C. Designed specifically for

data centre synchronisation, 5G Base Stations and Small Cells, 5G Advanced and 6G Radio

Access Networks (RAN), it is Rakon’s first OCXO to incorporate its proprietary Mercury™ ASIC and XMEMS® resonator

technologies, providing increased stability and holdover performance.

The ROM1490X builds on Rakon’s expertise in miniature ASIC based OCXOs, XMEMS® crystal resonators, electric circuit design,

thermal packaging, quality manufacturing processes, and high-resolution testing methods. The small form factor OCXO in

footprint size 14 x 9 mm achieves an 8-hour phase holdover (1.5 µs). It delivers a low-frequency slope of 0.05 ppb/°C and

guarantees long-term stability of ±2.5 ppm over 20 years.

Equipped with a thermal protection package, the ROM1490X can withstand increased low/high temperatures and strong

airflows, while maintaining reliable frequency signals and timing synchronisation. Exceeding the Stratum 3E requirement of ±5

ppb and offering an advanced stability of ≤±3 ppb, the ROM1490X emerges as the optimal choice for demanding

telecommunications applications in performance and reliability.

Frequency Stability (FvT)



≤±1.5 ppb (-40 to 95°C)

available upon request

Phase Noise @ 10 MHz



1 Hz offset: -85 dBc/Hz



Floor noise: -160 dBc/Hz

Key specifications

Applications



Package: 14.2 x 9.2 x 6.5 mm, 6-pad, SMD



Frequency (Fn): 10 to 50 MHz



Frequency stability (FvT): ±3 ppb



Operating temperature: -40 to 95°C



Long term stability: ±2.5 ppm / 20 year



Frequency slope ( ΔF/ΔT): 0.05 ppb/°C



Floor noise (@10 MHz): -160 dBc/Hz



Output waveform: CMOS



Voltage supply: 2.7 to 5 V



Radio access networks / O-RAN



Stratum 3E, IEEE 1588



Switches and data centres



PTP enabled ethernet switches and

routers



Cable modem CMTS and remote PHYs



G.8262, G.8262.1, G.8263, G.8273.2,

G.8273.3, G.8273.4



Test and measurement

2

0

-2

-40

-20

0

20

40

60

80

95

Temperature (°C)

Frequency (Hz)

10

0

10

1

10

2

10

3

10

4

10

5

10

6