7B08020001 8 MHz ±30ppm Crystal 18pF SMD Equivalent & Substitute Parts

Part Overview

The TXC CORPORATION 7B08020001 is an 8 MHz fundamental mode crystal oscillator with 18pF load capacitance, designed for surface mount applications in 4-SMD, No Lead package configuration. This part operates across the industrial temperature range of -40°C to 85°C with ±30ppm frequency stability and 80 Ohms equivalent series resistance (ESR).

The 7B08020001 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this crystal specification.

Substiute Parts

7B08020001

TXC CORPORATIONIn Stock: 7627B08020001 Datasheet

Current PartRFQ

C3E-8.000-18-3030-X-R

Aker Technology CorpIn Stock: 5826C3E-8.000-18-3030-X-R Datasheet

SimilarRFQ

C5S-8.000-16-3030-X-R

Aker Technology USAIn Stock: 1800C5S-8.000-16-3030-X-R Datasheet

SimilarRFQ

C5S-8.000-18-3030-X-R

Aker Technology USAIn Stock: 3324C5S-8.000-18-3030-X-R Datasheet

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H130B-8.000-18-3030-EXT-TR

Raltron ElectronicsIn Stock: 7994H130B-8.000-18-3030-EXT-TR Datasheet

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LFXTAL059158

IQD Frequency ProductsIn Stock: 4551LFXTAL059158 Datasheet

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QT532S-8.000MAHJ-T

QSTIn Stock: 769QT532S-8.000MAHJ-T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7B08020001 is determined by the following critical parameters:

Primary Matching Criteria:

• Frequency: 8.0000 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)
• Package Type: 4-SMD, No Lead (exact match required)
• Operating Mode: Fundamental (exact match required)

Secondary Compatibility Parameters:

• Load Capacitance: 18pF (primary specification; 16pF variants acceptable with circuit design verification)
• ESR: 80 Ohms (nominal; range 70–150 Ohms acceptable depending on circuit requirements)
• Physical Dimensions: 5.00 x 3.20mm footprint (standard for this package class)

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (18pF Load Capacitance) Parts matching all primary criteria and 18pF load capacitance specification. These include C5S-8.000-18-3030-X-R, H130B-8.000-18-3030-EXT-TR, and QT532S-8.000MAHJ-T.

Category 2: Parameter Variants (16pF Load Capacitance) Parts matching all primary criteria but with 16pF load capacitance. These include C5S-8.000-16-3030-X-R and LFXTAL059158. These variants require circuit-level evaluation to confirm compatibility with the application's oscillator circuit design.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Direct Equivalents):

The QT532S-8.000MAHJ-T (QST) and H130B-8.000-18-3030-EXT-TR (Raltron Electronics) are the preferred substitutes for the 7B08020001. Both parts match all primary electrical parameters including 8 MHz frequency, ±30ppm stability, 18pF load capacitance, and -40°C to 85°C operating range. Both are classified as Active products with ROHS3 compliance, ensuring long-term supply availability and regulatory alignment. The QT532S-8.000MAHJ-T provides an exact ESR match at 80 Ohms, while the H130B-8.000-18-3030-EXT-TR operates at 85 Ohms ESR, representing a 6% variance within acceptable oscillator circuit tolerances.

The C5S-8.000-18-3030-X-R (Aker Technology USA) is an alternative direct equivalent with 18pF load capacitance and Active product status. This part operates at 70 Ohms ESR, representing a 12.5% reduction from the original specification. This ESR variance is within typical oscillator design margins and does not preclude substitution.

Secondary Substitutes (Parameter Variants):

The C5S-8.000-16-3030-X-R (Aker Technology USA) and LFXTAL059158 (IQD Frequency Products) feature 16pF load capacitance instead of 18pF. These parts are suitable substitutes only when the application circuit has been designed or verified to accommodate 16pF load capacitance. The C5S-8.000-16-3030-X-R operates at 70 Ohms ESR; the LFXTAL059158 operates at 150 Ohms ESR. Both are Active products with ROHS3 compliance.

Not Recommended:

The C3E-8.000-18-3030-X-R (Aker Technology Corp) exhibits 500 Ohms ESR, representing a 525% increase from the original 80 Ohms specification. This significant ESR elevation may compromise oscillator startup characteristics and frequency stability in circuits designed for the original 80 Ohms parameter. This part is not recommended as a substitute without comprehensive circuit re-evaluation and testing.

Frequently Asked Questions (FAQ)

Q1: Can the C5S-8.000-18-3030-X-R directly replace the 7B08020001 without circuit modifications?

A: Yes. The C5S-8.000-18-3030-X-R matches all primary electrical specifications: 8 MHz frequency, ±30ppm stability, 18pF load capacitance, and -40°C to 85°C operating range. The 70 Ohms ESR represents a 12.5% reduction from the original 80 Ohms, which is within standard oscillator circuit design tolerances. No circuit modifications are required.

Q2: What is the difference between 16pF and 18pF load capacitance variants, and can they be interchanged?

A: Load capacitance specifies the external capacitive load the crystal oscillator circuit must present for the crystal to oscillate at its specified frequency. A 16pF variant requires the circuit to present 16pF load capacitance; an 18pF variant requires 18pF. These are not interchangeable without circuit design verification. If your circuit was designed for 18pF load capacitance, substituting a 16pF crystal may result in frequency deviation. Consult your oscillator circuit schematic to confirm the specified load capacitance before selecting a 16pF variant.

Q3: Why does the C3E-8.000-18-3030-X-R have such high ESR compared to other substitutes?

A: The C3E-8.000-18-3030-X-R is manufactured by Aker Technology Corp and exhibits 500 Ohms ESR, significantly higher than the original 80 Ohms specification. High ESR can increase power consumption, reduce oscillation amplitude, and compromise frequency stability in circuits with limited drive capability. This part is not recommended as a direct substitute without comprehensive circuit testing and validation.

Q4: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant. The original 7B08020001 is RoHS Compliant. All substitutes meet or exceed the original RoHS compliance status, ensuring regulatory alignment for applications subject to RoHS requirements.

Q5: What is the significance of "Active" versus "Obsolete" product status?

A: Product status indicates manufacturer support and supply availability. The 7B08020001 is classified as Obsolete, meaning TXC CORPORATION has discontinued production and support. All recommended substitutes are classified as Active, indicating ongoing production, manufacturer support, and long-term supply availability. Selecting Active products ensures design continuity and reduces supply chain risk.

Q6: Can I use the H130B-8.000-18-3030-EXT-TR as a drop-in replacement?

A: Yes. The H130B-8.000-18-3030-EXT-TR (Raltron Electronics) is a direct equivalent with matching frequency, stability, load capacitance, and operating temperature range. The 85 Ohms ESR represents a 6% increase from the original 80 Ohms, which is within acceptable oscillator design tolerances. This part is suitable for direct substitution without circuit modifications.

Q7: What packaging format is used for these crystal parts?

A: All parts listed, including the 7B08020001 and all substitutes, use 4-SMD, No Lead surface mount package with 5.00 x 3.20mm footprint dimensions. This standardized package ensures mechanical and electrical compatibility across all listed parts. No PCB layout modifications are required when substituting between these parts.

Q8: How do I verify that a substitute part is compatible with my specific application?

A: Verify compatibility by confirming: (1) Frequency matches your circuit requirement (8.0000 MHz); (2) Load capacitance matches your oscillator circuit design (18pF or 16pF as applicable); (3) Operating temperature range encompasses your application environment (-40°C to 85°C); (4) ESR is within your circuit's drive capability specifications. Consult your oscillator circuit schematic and application requirements before final part selection.