7M-40.000MBBK-T Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 7M-40.000MBBK-T is a 40 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION. This surface mount device is specified for 20pF load capacitance with ±50ppm frequency stability across an operating temperature range of -20°C to 70°C. The component is actively produced and maintains RoHS compliance with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are identified when original inventory is unavailable or when equivalent electrical and mechanical specifications are required for circuit board redesign or manufacturing optimization.

Substiute Parts

7M-40.000MBBK-T

TXC CORPORATIONIn Stock: 9267M-40.000MBBK-T Datasheet

Current PartRFQ

ECS-400-20-33-TR

ECS Inc.In Stock: 1795ECS-400-20-33-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7M-40.000MBBK-T is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 40.0000 MHz (exact match required)
• Frequency Stability: ±50ppm (tolerance band must not exceed specification)
• Load Capacitance: 20pF (exact match required)
• Operating Mode: Fundamental
• Operating Temperature Range: -20°C to 70°C (minimum coverage required)
• Package Type: 4-SMD, No Lead
• Physical Dimensions: 3.20mm × 2.50mm footprint
• Mounting Type: Surface Mount
• Packaging Format: Tape & Reel

Allowable Variation Parameters:

• ESR (Equivalent Series Resistance): Variation permitted within component design specifications
• Manufacturer: Different manufacturers acceptable if all electrical and mechanical parameters align
• Series designation: Different series acceptable if specifications match

The substitute part ECS-400-20-33-TR meets all mandatory matching criteria and is therefore classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Component: 7M-40.000MBBK-T

The TXC CORPORATION 7M-40.000MBBK-T is the specified component for this application. It is actively produced with confirmed inventory availability (901 pcs in stock). The device carries full RoHS compliance certification and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.

Substitute Component: ECS-400-20-33-TR

The ECS Inc. ECS-400-20-33-TR is an equivalent substitute meeting all mandatory electrical and mechanical specifications. This component demonstrates:

• Identical frequency specification (40.0000 MHz)
• Matching frequency stability (±50ppm)
• Identical load capacitance (20pF)
• Identical package footprint and height (3.20 × 2.50 × 0.80 mm)
• Identical operating temperature range (-20°C to 70°C)
• ROHS3 compliance (enhanced RoHS standard)
• Equivalent regulatory classification (EAR99, HTSUS 8541.60.0060)
• Higher inventory availability (1767 pcs in stock)

The ESR difference (40 Ohms vs. 60 Ohms) represents a design variation within acceptable component tolerances and does not affect substitution eligibility when electrical performance requirements are met by the circuit design.

Selection between these components should be based on availability, lead time, cost, and supply chain requirements. Both components are suitable for direct substitution in applications designed for 40 MHz ±50ppm crystals with 20pF load capacitance.

Frequently Asked Questions (FAQ)

Q: Can the ECS-400-20-33-TR be used as a direct replacement for the 7M-40.000MBBK-T?

A: Yes. The ECS-400-20-33-TR meets all mandatory electrical and mechanical specifications. Both components operate at 40.0000 MHz with ±50ppm stability, 20pF load capacitance, identical package dimensions, and matching temperature ranges. Direct substitution is supported without circuit modification.

Q: What is the significance of the ESR difference (60 Ohms vs. 40 Ohms)?

A: ESR (Equivalent Series Resistance) is a design parameter that affects crystal oscillator circuit performance. The ECS-400-20-33-TR has lower ESR (40 Ohms) compared to the TXC component (60 Ohms). This variation is within normal manufacturing tolerances for crystal oscillators and does not prevent substitution. Circuit design must accommodate the specified load capacitance (20pF) and frequency stability (±50ppm) for both components.

Q: Are both components RoHS compliant?

A: Yes. The 7M-40.000MBBK-T carries RoHS compliance certification. The ECS-400-20-33-TR carries ROHS3 compliance certification, which represents an enhanced RoHS standard. Both meet current regulatory requirements for lead-free manufacturing and hazardous substance restrictions.

Q: Do the components have identical physical dimensions?

A: Yes. Both components share identical footprint dimensions (3.20mm × 2.50mm) and maximum seated height (0.80mm). Both are packaged as 4-SMD, No Lead devices in Tape & Reel format. PCB layout and reflow soldering parameters remain unchanged between components.

Q: What is the operating temperature range for both components?

A: Both the 7M-40.000MBBK-T and ECS-400-20-33-TR operate across -20°C to 70°C. This temperature range applies to frequency stability performance and component reliability specifications.

Q: Are there any regulatory or export considerations?

A: Both components are classified under ECCN EAR99 and HTSUS code 8541.60.0060. Both carry REACH Unaffected status. No additional regulatory documentation is required for substitution between these components.

Q: What packaging format is used for both components?

A: Both components are supplied in Tape & Reel (TR) format, standard for surface mount crystal oscillators in production environments. Reel specifications and tape dimensions are consistent with industry standards for 4-SMD packages.