9B-20.000MEEJ-B Equivalent & Substitute Parts

Part Overview

The 9B-20.000MEEJ-B is a 20 MHz through-hole crystal oscillator manufactured by TXC CORPORATION. This component operates at a fundamental frequency with 18pF load capacitance and 30 Ohms equivalent series resistance, housed in an HC-49/US package. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

9B-20.000MEEJ-B

TXC CORPORATIONIn Stock: 7489B-20.000MEEJ-B Datasheet

Current PartRFQ

ECS-200-18-4X-CKM

ECS Inc.In Stock: 1697ECS-200-18-4X-CKM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9B-20.000MEEJ-B is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Frequency: 20 MHz (exact match required)
• Frequency Stability: ±10ppm (exact match required)
• Load Capacitance: 18pF (exact match required)
• ESR: 30 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)

Mechanical Equivalence Requirements:

• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -20°C to 70°C (minimum required)

Compliance Requirements:

• RoHS3 Compliance (mandatory for substitution)

The substitute part ECS-200-18-4X-CKM meets all electrical and mechanical equivalence criteria. Physical dimensions vary slightly within acceptable tolerances for HC-49/US package specifications, and the substitute maintains full compliance with applicable environmental and trade regulations.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: ECS-200-18-4X-CKM

The ECS-200-18-4X-CKM is a direct electrical and mechanical equivalent to the obsolete 9B-20.000MEEJ-B. Selection of this substitute is based on the following factors:

Product Status Consideration: The 9B-20.000MEEJ-B is classified as obsolete, whereas the ECS-200-18-4X-CKM maintains active product status with confirmed inventory availability (1673 units in stock versus 684 units for the original part). This ensures long-term supply continuity.

Compliance Alignment: Both parts maintain ROHS3 compliance and share identical ECCN (EAR99) and HTSUS (8541.60.0050) classifications, ensuring regulatory equivalence for procurement and export purposes.

Electrical Performance: All critical electrical parameters are identical: 20 MHz frequency, ±10ppm stability, 18pF load capacitance, and 30 Ohms ESR. The fundamental operating mode and -20°C to 70°C temperature range are preserved.

Mechanical Compatibility: Both components use HC-49/US through-hole packaging. Physical dimension variations (length, width, height) fall within standard HC-49/US package tolerances and do not affect PCB footprint compatibility or mounting reliability.

Packaging Consideration: The substitute is supplied in bulk packaging, whereas original inventory information does not specify packaging type. Verify bulk packaging compatibility with your procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the ECS-200-18-4X-CKM be used as a direct replacement for the 9B-20.000MEEJ-B without circuit modification?

A: Yes. The ECS-200-18-4X-CKM is electrically and mechanically equivalent across all critical parameters: frequency (20 MHz), stability (±10ppm), load capacitance (18pF), ESR (30 Ohms), operating mode (fundamental), temperature range (-20°C to 70°C), and package type (HC-49/US through-hole). No circuit redesign is required.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist within HC-49/US package tolerances. The substitute is slightly smaller in length (0.447" vs 0.453"), width (0.183" vs 0.197"), and height (0.138" vs 0.145"). These differences do not affect PCB footprint compatibility or mounting performance.

Q: What is the significance of the product status difference (obsolete vs. active)?

A: The original 9B-20.000MEEJ-B is obsolete, meaning TXC CORPORATION no longer manufactures this part. The ECS-200-18-4X-CKM is active production, ensuring reliable long-term availability and supply chain stability for new designs and production runs.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both parts are ROHS3 compliant and share identical ECCN (EAR99) and HTSUS (8541.60.0050) classifications. The substitute maintains full compliance with applicable environmental regulations and trade requirements.

Q: What is the difference between packaging types listed for these parts?

A: The original part information does not specify packaging type, while the substitute is supplied in bulk packaging. Confirm that bulk packaging is compatible with your assembly and procurement workflows before ordering.

Q: Are there any frequency or stability differences that would affect circuit performance?

A: No. Both parts operate at identical frequency (20 MHz) with identical stability (±10ppm) and tolerance (±10ppm). Circuit performance and timing accuracy are preserved with the substitute.

Q: Can the ECS-200-18-4X-CKM be used in applications requiring the full -20°C to 70°C operating range?

A: Yes. The substitute maintains the identical operating temperature range of -20°C to 70°C, ensuring performance across the full specified environmental conditions.