High Precision OCXOs Selection Guide

Engineered for stratum-grade timing and atomic-level precision requirements. By integrating premium quartz blanks into localized, thermally-stabilized ovens, our OCXO(Oven Controlled Crystal Oscillator) series eliminate ambient thermal frequency drift. Select by warm-up power, phase noise floor, and package style for telecom and defense networks.

Not sure where to start?

Three ways to match your needs, or quickly contact FCom’s engineering team.

By Package & Form Factor

Select from compact SMD form factors optimized for high-density modern hardware, to classic through-hole DIP and metal-can layouts (such as CO8 or European standard packages) for legacy system drop-in replacement.

SMD OCXO Table

Through-Hole DIP

By Stability & Jitter Performance

Filter by critical stability tiers to meet network specifications. Access standard±50 ppb stability for entry-level timing, or select high-precision solutions achieving ±10 ppb or better, coupled with ultra-low close-in phase noise.

High Precision (≤10 ppb)

Ultra-Low Phase Noise

By Telecommunication Application

Align your design with global infrastructure requirements. Source robust timing cores designed for Stratum 3/3E network synchronization, wireless cellular base stations (LTE/5G), and precision microwave backhaul equipment.

Stratum 3/3E Compliant

Telecom Base Stations

Series Parametric Table

Compare by package, frequency range, tolerance, temperature range, and more. Click any Series name to download its datasheet.

Series	Package	Frequency Range	Supply Voltage	Tightest Stability	Temp. Range	Output	dBc/Hz @10 Hz	dBc/Hz @100 Hz	dBc/Hz @1 kHz	dBc/Hz @10 kHz	Mounting Type	Contact
FOC-1D	14 Pin DIP	10 - 40 MHz	3.3 V, 5 V	±50 ppb	-40 to +85℃	Rectangular, Sine Wave	-105	-130	-140	-150	DIP	Inquiry
FOC-2D	20x20 5 Pin	5 - 40 MHz	3.3 V, 5 V	±5 ppb	-40 to +85℃	HCMOS, Sine Wave	-115	-135	-145	-150	DIP	Inquiry
FOC-3D	25x25 5 Pin	5 - 40 MHz	3.3 V, 5 V	±3 ppb	-40 to +85℃	TTL, Sine Wave	-120	-135	-145	-150	DIP	Inquiry
FOC-4D	36x27 5 Pin	5 - 40 MHz	3.3 V, 5 V	±3 ppb	-40 to +85℃	TTL, Sine Wave	-120	-135	-145	-150	DIP	Inquiry
FOC-5S	14x9 6-SMD	10 - 40 MHz	3.3 V, 5 V	±10 ppb	-40 to +85℃	HCMOS, Sine Wave	-92	-120	-140	-150	SMD	Inquiry
FOC-6S	25x22 7-SMD	5 - 40 MHz	3.3 V, 5 V	±5 ppb	-40 to +85℃	HCMOS	-115	-130	-140	-150	SMD	Inquiry
FOC-7S	9x7 4-SMD	10 - 40 MHz	3.3 V	±5 ppb	-40 to +85℃	CMOS, Clipped Sine Wave	-92	-120	-140	-150	SMD	Inquiry

Picture	Series	Package	Frequency Range	Supply Voltage	Tightest Stability	Temp. Range	Output	dBc/Hz @10 Hz	dBc/Hz @100 Hz	dBc/Hz @1 kHz	dBc/Hz @10 kHz	Mounting Type	Contact
	FOC-5S-LN	14x9 6-SMD	10 - 40 MHz	3.3 V, 5 V	±5 ppb	-40 to +85℃	Rectangular	-120	-145	-157	-162	SMD	Inquiry

Matched a series? Here's what comes next.

Once you’ve narrowed it down, the real work is confirming it works on your board not just on the datasheet. To advance your prototype manufacturing, we offer the following support:

Phase 01 // Product Selection

Download Selection Guide

Compare 8 OCXO series by package, frequency, supply voltage, stability and phase noise, including standard and low-noise options.

Phase 02 // Engineering

Validate Circuit Match

Submit your target parameters and IC model. Our laboratory verifies drive-level margins, startup conditions, and negative resistance stability.

Full-Cycle Engineering Services

Beyond standard verification, our laboratory provides complete technical support throughout your entire product lifecycle:

Contact an FCom Engineer