7B-16.384MBBK-T Crystal Equivalent & Substitute Parts

Part Overview

The 7B-16.384MBBK-T is a 16.384 MHz surface mount crystal oscillator manufactured by TXC CORPORATION. This component is classified as obsolete, indicating discontinued production and limited availability. The part operates at a fundamental frequency with ±50ppm stability and is designed for applications requiring precise timing in embedded systems, telecommunications, and industrial equipment. Due to its obsolete status, identifying compatible substitute parts is essential for ongoing design support and production continuity.

Substiute Parts

7B-16.384MBBK-T

TXC CORPORATIONIn Stock: 10577B-16.384MBBK-T Datasheet

Current PartRFQ

7M-16.384MBBK-T

TXC CORPORATIONIn Stock: 10567M-16.384MBBK-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 7M-16.384MBBK-T qualifies as a direct substitute based on the following critical parameters:

Matching Parameters:

• Identical frequency: 16.384 MHz
• Identical frequency stability: ±50ppm
• Identical load capacitance: 20pF
• Identical operating mode: Fundamental
• Identical operating temperature range: -20°C ~ 70°C
• Identical mounting type: Surface Mount
• Identical package type: 4-SMD, No Lead
• Identical RoHS compliance status
• Identical moisture sensitivity level

Differing Parameters:

• ESR: 7B series = 40 Ohms; 7M series = 80 Ohms
• Physical dimensions: 7B = 5.00mm × 3.20mm; 7M = 3.20mm × 2.50mm
• Height: 7B = 1.05mm; 7M = 0.80mm
• Product status: 7B = Obsolete; 7M = Active
• Packaging format: 7B = Bulk; 7M = Tape & Reel

The 7M-16.384MBBK-T maintains electrical compatibility through identical frequency, stability, load capacitance, and operating parameters. The higher ESR value (80 Ohms vs. 40 Ohms) and smaller physical footprint represent the primary technical differences.

Parameter Comparison

Engineering Selection Recommendations

The 7M-16.384MBBK-T is the appropriate substitute for the obsolete 7B-16.384MBBK-T based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical frequency (16.384 MHz), frequency stability (±50ppm), load capacitance (20pF), and operating temperature range (-20°C ~ 70°C). These parameters ensure functional equivalence in timing-critical applications.

Regulatory Compliance: Both parts are RoHS compliant and carry identical moisture sensitivity ratings (MSL 1), satisfying environmental and reliability requirements for industrial and commercial applications.

Product Status Advantage: The 7M series is active production, ensuring long-term availability and supply chain continuity compared to the discontinued 7B series.

Physical Considerations: The 7M-16.384MBBK-T features a smaller footprint (3.20mm × 2.50mm vs. 5.00mm × 3.20mm) and reduced height (0.80mm vs. 1.05mm). PCB layout modifications may be required for direct replacement in space-constrained designs.

ESR Difference: The 7M series exhibits higher equivalent series resistance (80 Ohms vs. 40 Ohms). Circuit designs with tight ESR specifications must evaluate this parameter against oscillator circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the 7M-16.384MBBK-T directly replace the 7B-16.384MBBK-T without circuit modifications?

A: Electrical substitution is valid based on matching frequency, stability, load capacitance, and operating temperature parameters. However, the higher ESR (80 Ohms vs. 40 Ohms) and smaller physical dimensions require circuit evaluation. PCB layout changes are necessary due to the reduced footprint.

Q: What is the significance of the ESR difference between these parts?

A: ESR affects oscillator startup characteristics and power consumption. The 7M series' higher ESR (80 Ohms) may require oscillator circuit tuning compared to the 7B series (40 Ohms). Circuit designers must verify oscillator performance with the substitute part's ESR specification.

Q: Are both parts suitable for the same temperature range applications?

A: Yes. Both the 7B-16.384MBBK-T and 7M-16.384MBBK-T operate across the identical temperature range of -20°C to 70°C, ensuring thermal compatibility in equivalent applications.

Q: What packaging differences exist between these parts?

A: The 7B series is supplied in bulk packaging, while the 7M series is supplied in Tape & Reel (TR) format. This affects handling, storage, and automated assembly processes but does not impact electrical performance.

Q: Why is the 7M series recommended despite the ESR difference?

A: The 7M-16.384MBBK-T is in active production, providing supply security and long-term availability. The ESR difference is a known, measurable parameter that can be accommodated through circuit design verification rather than a compatibility barrier.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both parts are RoHS compliant and carry identical moisture sensitivity ratings (MSL 1), satisfying equivalent regulatory and environmental requirements.