7B-14.7456MBBK-T Crystal Equivalent & Substitute Parts

Part Overview

The 7B-14.7456MBBK-T is a 14.7456 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications in 4-SMD, No Lead packaging. This component operates across the temperature range of -20°C to 70°C with a frequency stability of ±50ppm and a load capacitance of 20pF.

The 7B-14.7456MBBK-T is classified as Obsolete. Identification of equivalent and substitute parts is necessary to ensure continued availability for new designs, production continuity, and component sourcing flexibility when the original part becomes unavailable or when design requirements necessitate alternative specifications.

Substiute Parts

7B-14.7456MBBK-T

TXC CORPORATIONIn Stock: 11477B-14.7456MBBK-T Datasheet

Current PartRFQ

7M-14.7456MBBK-T

TXC CORPORATIONIn Stock: 7247M-14.7456MBBK-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7B-14.7456MBBK-T is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 14.7456 MHz (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -20°C to 70°C (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• RoHS Compliance: Required

Allowable Variation Parameters:

• ESR (Equivalent Series Resistance): Variation permitted within circuit design tolerance
• Physical Dimensions: Variation permitted if mounting footprint compatibility is maintained
• Height - Seated (Max): Variation permitted if PCB clearance requirements are satisfied

The 7M-14.7456MBBK-T meets all mandatory matching parameters and is therefore classified as a direct substitute for the 7B-14.7456MBBK-T.

Parameter Comparison

Engineering Selection Recommendations

The 7M-14.7456MBBK-T is a direct substitute for the 7B-14.7456MBBK-T based on compliance with all mandatory electrical and mechanical parameters. The substitute part is classified as Active, ensuring continued availability and supply chain reliability compared to the Obsolete status of the original part.

Both parts are RoHS Compliant and carry Moisture Sensitivity Level 1 (Unlimited), meeting environmental and handling requirements for industrial applications.

The primary difference between the two parts is the ESR specification: the 7B series specifies 40 Ohms, while the 7M series specifies 100 Ohms. This variation must be evaluated within the context of the specific circuit design and oscillator load requirements. Additionally, the 7M-14.7456MBBK-T features a smaller physical footprint (3.20mm x 2.50mm versus 5.00mm x 3.20mm) and reduced height (0.80mm versus 1.05mm), which may provide advantages in space-constrained PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the 7M-14.7456MBBK-T be used as a direct replacement for the 7B-14.7456MBBK-T?

A: Yes. Both parts share identical frequency (14.7456 MHz), frequency stability (±50ppm), load capacitance (20pF), operating mode (Fundamental), operating temperature range (-20°C to 70°C), mounting type (Surface Mount), and package type (4-SMD, No Lead). Both are RoHS Compliant with MSL 1 rating.

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

A: The 7B-14.7456MBBK-T specifies 40 Ohms ESR, while the 7M-14.7456MBBK-T specifies 100 Ohms ESR. ESR affects the crystal's impedance characteristics and power consumption in the oscillator circuit. The circuit design must accommodate the higher ESR of the 7M series. Verification of oscillator circuit performance is required during design integration.

Q: Are there physical mounting differences between these parts?

A: Yes. The 7M-14.7456MBBK-T is physically smaller (3.20mm x 2.50mm versus 5.00mm x 3.20mm) and has reduced height (0.80mm versus 1.05mm). Both use 4-SMD, No Lead packaging. PCB footprint compatibility must be confirmed before substitution.

Q: Why is the 7B-14.7456MBBK-T classified as Obsolete?

A: The 7B series has reached end-of-life status. The 7M-14.7456MBBK-T, classified as Active, represents the current production equivalent from TXC CORPORATION for this frequency specification.

Q: Are both parts suitable for new designs?

A: The 7M-14.7456MBBK-T is recommended for new designs due to its Active product status and continued manufacturing availability. The 7B-14.7456MBBK-T should be used only for legacy system maintenance or when existing inventory is available.