INDUSTRY COMPONENT

Package/Housing

Protective housing for crystal oscillator components that provides mechanical stability, environmental protection, and electrical shielding.

Component Specifications

Definition
The package/housing in a crystal oscillator is a precisely engineered enclosure that contains and protects the quartz crystal resonator and associated electronic components. It serves multiple critical functions including mechanical support, thermal management, electromagnetic interference (EMI) shielding, and environmental protection against moisture, dust, and contaminants. The housing maintains the crystal's precise frequency stability by providing controlled atmospheric conditions and minimizing external vibrations and thermal fluctuations.
Working Principle
The package/housing operates on principles of mechanical protection, thermal management, and electromagnetic compatibility. It provides a hermetic or semi-hermetic seal to maintain stable internal conditions for the quartz crystal resonator, prevents contamination from external elements, dissipates heat generated during operation, and shields the sensitive oscillator circuitry from external electromagnetic interference while containing its own emissions.
Materials
Common materials include: Kovar alloy (Fe-Ni-Co) for metal packages, ceramic (alumina Al₂O₃) for surface-mount devices, plastic (PPS, LCP) for cost-effective applications, and glass for specialized hermetic seals. Lead frames typically use Alloy 42 or copper alloys. Sealing materials include glass frit, solder, or epoxy resins.
Technical Parameters
ParameterTypical rangeNotes & selection driver
DimensionsStandard sizes: 3.2x2.5mm, 5.0x3.2mm, 7.0x5.0mm
Lead Count4-pin, 6-pin, 8-pin configurations
Package TypeSMD (Surface Mount Device), DIP (Dual In-line Package), TO (Transistor Outline)
Sealing TypeHermetic, Semi-hermetic, Non-hermetic
Mounting Height0.8mm to 1.2mm typical
Storage Temperature-55°C to +125°C
Operating Temperature-40°C to +85°C (Commercial), -40°C to +125°C (Industrial)
Moisture Sensitivity LevelMSL 1 to MSL 3

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 9001, IEC 60122-1, JESD22-A113, MIL-PRF-55310

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Hermetic seal failure leading to moisture ingress
  • Thermal stress causing package cracking
  • EMI radiation exceeding regulatory limits
  • Mechanical vibration affecting frequency stability
  • Solder joint failure due to thermal cycling
FMEA Triads
Trigger: Inadequate sealing process control
Failure: Moisture ingress leading to frequency drift and eventual oscillator failure
Mitigation: Implement hermeticity testing (fine/ gross leak tests), use proper sealing materials, maintain controlled manufacturing environment
Trigger: Coefficient of thermal expansion (CTE) mismatch between materials
Failure: Package cracking or delamination during temperature cycling
Mitigation: Select materials with compatible CTE, implement stress relief designs, use compliant adhesives and sealants
Trigger: Insufficient EMI shielding design
Failure: Electromagnetic interference affecting nearby circuits or failing regulatory compliance
Mitigation: Implement proper grounding, use conductive coatings or metal shielding, optimize package geometry for EMI containment

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±10ppm to ±50ppm frequency stability, ±3% to ±10% frequency accuracy
Test Method
Environmental stress screening (ESS), thermal cycling (-55°C to +125°C), vibration testing (10-2000Hz), hermeticity testing (helium leak detection), EMI/EMC testing per FCC/CE standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Package/Housing

Manufacturer profiles associated with Package/Housing.

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Frequently Asked Questions

What is the difference between hermetic and non-hermetic crystal oscillator packages?

Hermetic packages provide complete sealing against moisture and gases using metal, ceramic, or glass materials, offering superior long-term stability and reliability. Non-hermetic packages use plastic materials with lower cost but reduced protection against environmental factors.

How does the package material affect crystal oscillator performance?

Package materials significantly impact thermal characteristics, mechanical stability, and EMI shielding. Ceramic packages offer excellent thermal conductivity and stability, metal packages provide superior EMI shielding, while plastic packages offer cost advantages with adequate performance for many commercial applications.

What are the key considerations when selecting a crystal oscillator package?

Key considerations include: operating environment (temperature, humidity), required frequency stability, EMI requirements, mounting method (SMD vs through-hole), space constraints, thermal management needs, and cost targets for the specific application.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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