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FOC-4D SC-Cut OCXO ±5 ppb | Telecom Holdover

DIP 36.3×27.2mm

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FEATURE

Explore the FOC-4D OCXO from FCom — a 36.3×27.2mm high-stability oven-controlled crystal oscillator with ±5 ppb precision, ideal for telecom, timing, and measurement systems.

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Datasheet

Product Description

FOC-4D SC-Cut OCXO (Oven Controlled Crystal Oscillator)

Q: What is the typical frequency stability of the FOC-4D?

±5 ppb over −40°C to +85°C (typ.), designed for high-precision timing and holdover.

Q: Does FOC-4D support sine wave output?

Yes. TTL rectangular is default; sine wave (50 Ω) is available as an option on request.

Q: What are the typical power requirements?

Startup current is ≤ 850 mA (typ.). Steady-state power is ~1.3 W at +25°C (typ.).

Q: Can I control frequency via voltage (EFC)?

Yes. 0–5 V EFC with approximately ±0.5 ppm tuning range and positive slope for fine trim and aging compensation.

A holdover-class OCXO for telecom synchronization and precision instruments. Designed for low phase noise and tight stability across temperature in a robust 36.3×27.2 mm DIP package. Use this page to confirm options, download docs, and request an RFQ fast.

±5 ppbstability (−40~+85 °C)

Ultra-low noise−120 @10 Hz; −150 @10 kHz

SC-Cutholdover-class performance

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RoHS / REACH Lot & Date Code (CoC on request) Telecom / Holdover

Key Features

Package: 36.3×27.2×12.7 mm DIP (through-hole)
Crystal: SC-Cut for superior stability and low noise
Frequency Range: 5–40 MHz
Output: TTL rectangular (sine wave optional)
Frequency Stability: ±5 ppb (−40 °C to +85 °C)
Phase Noise (typ.): −120 dBc/Hz @ 10 Hz, −150 dBc/Hz @ 10 kHz
Aging (typ.): ±0.5 ppb/day, ±50 ppb/year
Warm-up: ±10 ppm within 10 minutes @ +25 °C
EFC: 0–5 V, positive slope, ~±0.5 ppm range
Supply Voltage: 5.0 V ±5% (3.3 V optional)

Need characterized phase-noise or warm-up plots at your exact frequency/load? Request characterization with your RFQ.

Key Specs

Quick selection summary (typical values; verify at your target frequency and option set. Phase noise shown at stated offsets under nominal conditions).

5–40 MHzfrequency range

±5 ppb−40~+85 °C stability

−120 / −150dBc/Hz @10 Hz / @10 kHz

Detailed Specifications

Parameter	Value
Frequency Range	5 – 40 MHz
Output	TTL rectangular (sine optional)
Supply Voltage	5.0 V ±5% (3.3 V optional)
Power Consumption	Startup ≤ 850 mA; Steady ~1.3 W @ +25 °C
Warm-up Stability	±10 ppm within 10 minutes @ +25 °C
Frequency Stability	±5 ppb (−40 °C to +85 °C)
Aging	±0.5 ppb/day; ±50 ppb/year
Phase Noise	−120 dBc/Hz @ 10 Hz; −150 dBc/Hz @ 10 kHz (typ.)
EFC (VCO) Control	0–5 V, ±0.5 ppm tuning range, positive slope
Load	15 pF (TTL) / 50 Ω (sine)
Duty Cycle	45–55% @ 1.4 V

Values are typical and may vary by frequency and options. Request tighter screening, documentation, or extended characterization in your RFQ.

Applications

Telecom holdover for PTP/SyncE nodes (improves timing continuity during GNSS outages)
SDH/SONET and telecom base stations (tight stability supports network synchronization margins)
Reference timing for synthesizers & digital switches (low phase noise reduces close-in spurs/jitter)
Test & measurement instruments (stable timebase for repeatable measurements)
Harsh environment timing where temperature stability and aging matter

FOC-4D vs Other OCXOs

Model	Package	Stability	Notes
FOC-1D	20.3×12.7×11.0 mm	±0.1 ppm	Compact DIP
FOC-2D	20.6×20.6×13.2 mm	±0.1 ppm	Telecom-class
FOC-3D	25.4×25.4×12.7 mm	±10 ppb	High stability
FOC-4D (this)	36.3×27.2×12.7 mm	±5 ppb	SC-Cut, wide temp

Selection Path / Upgrade Options

If you are optimizing for size, start with FOC-1D. If you need telecom-class stability in a smaller footprint, consider FOC-3D. For system-level guidance and family mapping, see OCXO Family (Telecom/Critical Infrastructure) and OCXO Family (Military/Aerospace/Telecom).

Ordering / RFQ

Ordering Essentials

MPNFOC-4D
StatusActive — contact for availability
ComplianceRoHS / REACH
TraceabilityLot & Date Code (CoC on request)
Voltage / Output5.0 V (3.3 V opt) / TTL (sine opt)
Operating Temp−40~+85 °C

Ordering tip: specify frequency, voltage, output, temp range, and any screening/documentation needs (CoC, test reports, aging).

Request for Quote (FOC-4D)

Documents & Downloads

📄 FOC-4D Datasheet (PDF)

Package / Outline

More OCXO resources: OCXO Comparison Guide · TCXO vs OCXO · PTP/SyncE Application

Frequently Asked Questions (FAQ)

What is the typical frequency stability of the FOC-4D?

±5 ppb over −40 °C to +85 °C, suitable for high-precision timing and holdover.

Does FOC-4D support sine wave output?

Yes. TTL rectangular is default; sine wave output (50 Ω) is available upon request.

What are the typical power requirements?

Startup current is ≤ 850 mA. Steady-state power is approximately 1.3 W at +25 °C (typ.).

Can I control frequency via voltage (EFC)?

Yes, 0–5 V EFC with ~±0.5 ppm range and positive slope for fine trim and aging compensation.

Do you support samples and customization?

Yes. We support samples for evaluation, volume production, and customization (frequency, voltage, output, screening, documentation). Use RFQ or Contact to specify requirements.

What are typical MOQ and lead time?

MOQ and lead time depend on frequency/options and screening. Send target frequency, quantity, and need-by date via RFQ to receive a formal quote.

Can you provide CoC/test reports and traceability?

Yes. Lot/date code traceability is supported; CoC and test reports can be provided on request during quotation.

Technical Support & Compliance

Application engineering support is available for frequency planning, interface/output selection, screening, and characterization requests.

Contact / RFQ: https://www.fujicrystal.com/contact.html · Email: Fcom@fujicrystal.com
ISO Certification: ISO9001 · ISO14001

FOC-4D • ±5 ppb • 5–40 MHz • 36.3×27.2×12.7 mm • SC-Cut

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