FASTXO Series — Taitien Electronics Since 1976

Whatever frequency your IC needs,
ready in 24 hours.

When your design has locked in the clock frequency only to find the original supplier is out of stock — or that frequency simply has no inventory anywhere — FASTXO ships any frequency from 1 MHz to 2.1 GHz as samples in 24 hours and production volumes in 1 week. Fast delivery without compromising quality, so clock supply never becomes the project bottleneck.

24H 1K pcs sample shipment
1W 50K pcs production lead time
0.15 ps Phase Jitter (Differential)
2.1 GHz Frequency ceiling
TAITIEN ELECTRONICS — TAIWAN'S FIRST OCXO MANUFACTURER
When you need it

When do you need FASTXO?

When your design has locked in the clock frequency and needs samples or volume production — fast. Whether it's an urgent need for a standard frequency or a custom request for a non-standard one, FASTXO delivers a fast, reliable answer. Clock supply runs at your project's pace, not the other way around.
Scenario 1

Standard frequency, market shortage

Standard frequencies like 100 MHz or 125 MHz are usually easy to source — until a market shortage hits. Fab capacity caps out, specific packages run dry, and small orders get deprioritized; even standard specs slip by weeks. And those urgent sample needs can't wait. FASTXO holds standard-frequency stock and ships samples within 24 hours, so design verification doesn't get held hostage by supply chain swings.

Scenario 2

Non-standard frequency

Non-standard frequencies typically require custom development, and most suppliers carry no off-the-shelf stock. When your design calls for a precise, specific frequency, FASTXO synthesizes any frequency on demand — without being bound to a standard catalog.

Scenario 3

Second-source backup

When your existing supplier can't deliver on time, you need a reliable alternative. FASTXO works as a second source with compatible spec options, so a single supplier's troubles don't derail your project schedule.

FASTXO

A fast, flexible solution

FASTXO is built for these scenarios: any frequency from 1 MHz to 2.1 GHz, samples in 24 hours, production in 1 week. Whether the trigger is an urgent need, a non-standard frequency, or a backup supplier, FASTXO delivers a consistent, fast response.

FASTXO in the field
Trusted across mission-critical applications

Cloud data centers, 5G network equipment, automotive electronic systems, professional broadcast gear — FASTXO's frequency synthesis technology delivers any frequency on demand, keeping clock supply on schedule across applications.

Typical specialty frequencies
24.576 MHz  ←  Audio DAC/ADC master clock
30.72 MHz  ←  LTE base station IC
122.88 MHz  ←  5G NR base station
156.25 MHz  ←  10G/25G Ethernet PHY
644.53125 MHz  ←  100GbE reference clock
All within FASTXO's coverage range, with 24-hour sample availability.
Engagement paths

Pick the path that matches your project stage

FASTXO covers the full cycle from first sample to volume shipment. Pick the path that fits where your design is today.

Path 1 — Verification 24H Same-day confirmation, up to 1K pcs

FASTXO express samples

Once the IC vendor's frequency is locked in, you need physical samples for system integration testing and clock validation. FASTXO holds full-model stock and ships any frequency within 24 hours, so frequency confirmation never sits on the NPI critical path.

1 MHz – 2.1 GHz Any frequency Worldwide shipping Full test report
Path 2 — Production 1W 1-week lead time, up to 50K pcs

FASTXO production fast delivery

Samples verified, production kicks off. Same model, same supplier, same test report — 50K pieces ship in one week with zero BOM changes, saving the time and cost of re-qualification.

Seamless sample-to-production handoff Zero BOM changes Lot traceability
Path 3 — Second source 24H–1W Same-day delivery confirmation by volume

Second-source fast switchover

When your current supplier can't ship on time, or you're standing up a second source to de-risk supply. Send us your existing model or spec, and our FAE replies within one business day with the matching FASTXO model and current lead time.

Spec matching FAE response in 1 business day Supply risk diversification
Quality assurance

Does fast delivery come at the expense of quality?

PLL frequency synthesis lets us ship any frequency from stock fast, but the quartz oscillator's signal characteristics don't change — that's the heart of the FASTXO design: fast delivery and signal integrity are two sides of the same coin, not a tradeoff.

Three common quality risks in fast-delivery scenarios, and how FASTXO eliminates them by design:

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Risk 1: Skipped aging tests

Some suppliers skip high-temperature aging screening to meet a deadline, causing larger initial frequency drift. FASTXO stock has completed full aging testing — every shipment is compliant out of the box.

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Risk 2: Mixed lots

Emergency restocks that mix lots can introduce lot-to-lot variation. Taitien provides lot traceability documentation with every batch to ensure spec consistency.

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Risk 3: Incomplete documentation

Rush orders sometimes ship without test reports or compliance statements. Taitien's standard shipment includes a full test report, ISO 9001 certification, and RoHS conformance declaration.

✓

ISO 9001-certified quality system

Taitien holds ISO 9001, IATF 16949, and additional international quality certifications. Every shipment is produced under the same quality system.

✓

100% outgoing inspection

Every FASTXO undergoes 100% electrical testing of frequency, stability, and jitter before shipment, with the test report included.

✓

Inherent signal integrity of quartz oscillators

FASTXO uses a high-Q quartz crystal architecture, with superior close-in (1 Hz offset) phase noise compared to alternative technologies. No tradeoff between fast delivery and signal quality.

Phase noise comparison

Measured phase noise comparison between FASTXO CMOS output (PZ-U) and differential output (OD-M) at 125 MHz, 3.3 V. The differential architecture delivers lower close-in (1 Hz–1 kHz) phase noise — the critical band for SyncE, 5G fronthaul, and frequency synthesis references.

FASTXO Phase Noise @ 125 MHz, 3.3V  ·  Offset: 1 Hz – 10 MHz
PZ-U (CMOS) OD-M (Differential)
0 −40 −80 −120 −160 dBc/Hz 1 10 100 1k 10k 100k 1M 10M Offset (Hz) Close-in advantage region RMS Jitter integration band 12 kHz – 20 MHz
OD-M Differential
RMS Phase Jitter 0.15 ps（12 kHz–20 MHz @ 156.25 MHz）
PZ-U CMOS
RMS Phase Jitter 0.703 ps（12 kHz–20 MHz @ 125 MHz）
Three technical checks before selecting
Close-in phase noise
5G base station IF/LO, SyncE, GNSS, and frequency synthesis reference clocks are sensitive to 1 Hz offset phase noise. FASTXO differential outputs deliver 0.15 ps Phase Jitter — quartz's high-Q gives a structural advantage in the close-in offset region.
Zero changes from sample to production
24-hour samples and 50K production runs share the same model, the same lot certification, and the same test report — no BOM changes, no requalification cycle.
Full-spectrum coverage
Any frequency from 1 MHz to 2.1 GHz, five output types from CMOS to CML, complete XO / VCXO / TCXO product line — one supplier covers multi-protocol requirements.
Application-based selection

Match application scenarios to recommended FASTXO models

Eight typical application scenarios with the matching FASTXO models and key design requirements. For full datasheet details — package, frequency, stability, Phase Jitter — see the specification table below.

Consumer Electronics
Digital Home
Key requirements
Cost-sensitive · Standard interfaces · Stable high-volume supply
Recommended models
Wide Temperature XO (PX-U)
Miniature XO (PZ-U)
Displays, smart TVs, set-top boxes, digital home hubs.
IoT & Wearables
Wireless Comms
Key requirements
Minimal PCB footprint · Low power · Battery compatibility
Recommended models
Miniature XO (P4-U, PZ-U)
IoT modules, wearables, wireless sensor nodes, BLE / Wi-Fi modules.
Automotive
GNSS Positioning
Key requirements
Automotive qualification · Wide temperature · GNSS frequency precision
Recommended models
Wide Temperature XO (PY-U)
Low Noise TCXO (TX-P)
Automotive infotainment, ADAS subsystems, GNSS receiver modules, TPMS.
Industrial Automation
Control Systems
Key requirements
Wide-temp long-duration operation · Synchronized control · Long-term stability
Recommended models
Wide Temperature XO (PX-U)
Low Noise VCXO (VA-M)
PLC controllers, factory automation, machine vision, security surveillance.
Cloud Data Center
Servers
Key requirements
Ultra-low phase jitter · Differential signal integrity · High-speed serial link sync
Recommended models
Ultra Low Noise XO (OD-M, OJ-M)
High-density server racks, enterprise switches, storage arrays, AI accelerator cards.
5G Fronthaul / Backhaul
Infrastructure
Key requirements
3GPP frequency precision · Any-frequency support · SyncE / PTP synchronization
Recommended models
Low Noise TCXO (TX-P)
Ultra Low Noise XO (OD-M)
Low Noise VCXO (VT-M)
5G O-RAN DU/CU, backhaul equipment, IEEE 1588 grandmaster, SyncE synchronization systems.
Network Equipment
Routers
Key requirements
Multi-rate clock support · Differential low-jitter · High-reliability operation
Recommended models
Ultra Low Noise XO (OJ-M)
Low Noise XO (OA-M)
Wide Temperature XO (PX-U)
Enterprise switches, APs, home routers, fiber gateways.
5G Small Cell
CPE
Key requirements
3GPP frequency compliance · Compact package · Fast design validation
Recommended models
Low Noise TCXO (TX-P)
Low Noise XO (OA-M)
Small cell, femtocell, 5G CPE, fixed wireless access.
Full specifications

FASTXO Fast Delivery Series — Specification Overview

Complete spec table for the FASTXO Fast Delivery series, covering XO, VCXO, and TCXO across three product families. Every model supports 24-hour sample lead time — compare package, frequency, stability, and Phase Jitter directly against your datasheet.

Model Category Package (mm) Frequency Stability Temperature Phase Jitter Output
P4-U XO 1.2 × 1.0 1 – 125 MHz ±25 ppm -40 ~ +85°C 0.8 ps CMOS
PZ-U AEC-Q200 XO 2.05 × 1.65 1 – 200 MHz ±20 ppm -40 ~ +105°C 0.8 ps CMOS
PY-U AEC-Q200 XO 2.5 × 2.0 1 – 200 MHz ±20 ppm -40 ~ +105°C 0.8 ps CMOS
PX-U XO 3.2 × 2.5 1 – 200 MHz ±20 ppm -40 ~ +105°C 0.8 ps CMOS
PV-U XO 5 × 3.2 1 – 200 MHz ±20 ppm -40 ~ +105°C 0.8 ps CMOS
PC-U XO 7 × 5 1 – 200 MHz ±20 ppm -40 ~ +105°C 0.8 ps CMOS
OA-M Differential XO 3.2 × 2.5 10 – 1,500 MHz ±25 ppm -40 ~ +85°C 0.6 ps LVPECL / LVDS
OW-M Differential XO 5 × 3.2 10 – 1,500 MHz ±25 ppm -40 ~ +85°C 0.6 ps LVPECL / LVDS
OT-M Differential XO 7 × 5 10 – 1,500 MHz ±25 ppm -40 ~ +85°C 0.6 ps LVPECL / LVDS
OJ-M Differential XO 5 × 3.2 15 – 2,100 MHz ±25 ppm -40 ~ +85°C 0.15 ps LVPECL / LVDS / CML / HCSL
OD-M Differential XO 7 × 5 15 – 2,100 MHz ±25 ppm -40 ~ +85°C 0.15 ps LVPECL / LVDS / CML / HCSL
OD-P Differential XO 7 × 5 15 – 2,100 MHz ±25 ppm -40 ~ +85°C 0.15 ps CMOS / LVPECL / LVDS / CML / HCSL
VA-M Differential VCXO 3.2 × 2.5 10 – 1,500 MHz ±25 ppm -40 ~ +85°C 0.6 ps CMOS / LVPECL / LVDS (Pulling ±100 ppm)
VW-M Differential VCXO 5 × 3.2 10 – 1,500 MHz ±25 ppm -40 ~ +85°C 0.6 ps CMOS / LVPECL / LVDS (Pulling ±50 ppm)
VT-M Differential VCXO 7 × 5 10 – 1,500 MHz ±25 ppm -40 ~ +85°C 0.6 ps CMOS / LVPECL / LVDS (Pulling ±50 ppm)
TX-P Differential TCXO 3.2 × 2.5 10 – 1,500 MHz ±1 ppm -40 ~ +85°C 0.6 ps CMOS / LVPECL / LVDS
Spec evaluation

Stock spec doesn't match exactly — can I still use it?

One of the most common questions from design engineers. The matrix below covers substitution tolerance for six key parameters — a quick feasibility call during datasheet comparison.

Oscillator Substitution Spec Matrix
Parameter
Substitutable?
Deviation tolerance
Risk notes & guidance
Output frequency
⚠ Requires verification
±few ppm to ±50 ppm
Depends on system tolerance to frequency offset. Upstream PLL designs can absorb small offsets; reference-clock direct use requires strict matching.
Frequency stability
✓ Usually yes
Loosen ±25 → ±50 ppm
Loosened stability is usually acceptable unless the system requires strict clock precision (e.g., IEEE 1588 PTP or SyncE).
Phase Jitter
✗ Not recommended
Cannot be relaxed
SyncE, fronthaul, frequency synthesis, and wireless baseband processing are jitter-sensitive. The FASTXO OD-M/OJ-M series delivers 0.15 ps without compromise.
Supply voltage (Vdd)
✓ Mostly yes
1.8V / 2.5V / 3.3V
FASTXO supports all three voltages. If the design rail differs from the model default, verify output logic-level compatibility.
Package size
✓ Usually yes
Multiple sizes available
FASTXO offers packages from 1.2×1.0 mm to 7×5 mm. Match an existing footprint without PCB modifications.
Output waveform (CMOS/Differential)
✗ Not interchangeable
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CMOS is incompatible with LVDS/LVPECL/HCSL/CML. Confirm the receiver circuit type, then select the matching model.
FAQ

FAQ

Click to expand each answer.

What are FASTXO's main advantages?
FASTXO's core advantage is any-frequency support + fast delivery。We cover any frequency from 1 MHz to 2.1 GHz, with 24-hour samples and 1-week production — without being constrained by a standard catalog. The PLL frequency synthesis architecture meets non-standard frequency needs while fully preserving the signal integrity of a quartz oscillator.
Where has FASTXO been successfully deployed?
FASTXO has been deployed across multiple key sectors: cloud data center hardware (high-density compute), 5G network infrastructure (fronthaul/backhaul equipment), automotive electronic systems (ECU control units), and professional broadcast equipment (high-precision synchronization). These deployments demonstrate FASTXO's ability to meet a wide range of demanding clock requirements.
What temperature ranges does FASTXO support? Can it be used in automotive or industrial environments?
Mainstream FASTXO models support a wide -40°C to +85°C temperature range; select models (e.g., PZ-U) extend to +105°C. For specialized industrial or harsh environment needs, contact a Taitien FAE to confirm the appropriate model and specs.
What applications does the TX-P TCXO ±1 ppm stability support?
TX-P's ±1 ppm @ -40 to +85°C stability is suited for small cells, Synchronous Ethernet (SyncE), GNSS receiver modules, and optical transport equipment — applications sensitive to frequency precision. Frequency coverage spans 10 MHz to 1.5 GHz with any-frequency output and 24-hour sample lead time.
OD-M and OJ-M both deliver 0.15 ps jitter — what's the selection difference?
Their electrical specs are identical (Phase Jitter 0.15 ps, 15–2,100 MHz, LVPECL/LVDS/HCSL/CML support). The main difference is package size: OD-M is 7×5 mm, OJ-M is 5×3.2 mm and fits more space-constrained designs. Select based on PCB layout constraints.
Do fast-delivery oscillators come with full test reports and compliance documentation?
Yes. Every FASTXO shipment includes a frequency test report, ISO 9001 quality certification, RoHS conformance declaration, and lot traceability documentation as standard. For specialized certifications (e.g., AEC-Q200 automotive), please specify at the quotation stage.
If my current oscillator supplier can't deliver on time, can FASTXO serve as a contingency supply?
This is exactly FASTXO's core value scenario. When standard suppliers can't deliver on time, or you need supply chain resilience, FASTXO provides critical supply agility. Many manufacturers have built FASTXO into their supply management strategy. Just send us the original model number or spec parameters, and our FAE will reply within one business day with a matching solution.
Our project is in North America, and current geopolitics raises cross-border supply risk. Does Taitien provide localized support?
Yes. Taitien operates a North America Engineering Service Center (NAESC) in Lynnwood, Washington — with local manufacturing capacity, a regional logistics hub, and buffer stock — backed by a US-hours FAE team that engages directly from design-in through production. The full cycle stays in North America, avoiding Asia-time-zone delays and cross-border logistics disruptions. For long-term projects, VMI and multi-year supply agreements are available. Contact: NAESC@taitien.com。
If even FASTXO's 24-hour samples aren't fast enough, can I program the frequency on my own bench?
Yes. The Taitien PXW-3 Crystal Oscillator Programmer is a USB-powered bench tool that programs CMOS oscillators to any frequency from 1 MHz to 200 MHz in ≤ 2 seconds per part, covering five mainstream SMD packages from 7.5×5.0 to 2.0×1.6 mm. Keep a stock of blanks and program on demand — eliminating the 3–6 week wait for factory orders entirely. Programming parameters are co-developed with the Taitien oscillator team from the same internal architecture (not reverse-engineered from third-party tools); every programmed result matches factory specs and includes lot traceability.

When you need clocks fast
FASTXO is ready

Data centers, 5G infrastructure, and automotive electronics rely on FASTXO's fast supply capability. Whether the trigger is a non-standard frequency or an emergency delivery, send us your frequency, stability, package, and quantity requirements — we'll confirm a delivery plan within one business day.

Request a quote → View full product list

24H sample shipping  ·  1-week production lead time  ·  Any frequency  ·  Quartz signal integrity preserved

© TAITIEN ELECTRONICS CO., LTD. — Since 1976 — Taiwan's First OCXO Manufacturer
Specifications on this page are subject to the actual shipping model's datasheet. For updates, please contact Taitien sales.