9B-14.7456MEEJ-B MHz Crystal Equivalent & Substitute Parts

Part Overview

The 9B-14.7456MEEJ-B is a 14.7456 MHz through-hole crystal oscillator manufactured by TXC CORPORATION, designed for fundamental mode operation in timing and frequency control applications. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support, maintenance, and new design implementations where legacy frequency specifications are required.

The crystal operates at 14.7456 MHz with ±10ppm frequency stability, 18pF load capacitance, and 30 Ohms equivalent series resistance in an HC-49/US package. Due to its obsolete status, substitute parts with compatible electrical and mechanical parameters are necessary to maintain supply chain continuity.

Substiute Parts

9B-14.7456MEEJ-B

TXC CORPORATIONIn Stock: 7859B-14.7456MEEJ-B Datasheet

Current PartRFQ

9B-14.7456MAAJ-B

TXC CORPORATIONIn Stock: 15849B-14.7456MAAJ-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9B-14.7456MEEJ-B is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 14.7456 MHz (exact match required)
• Load Capacitance: 18pF (exact match required)
• ESR: 30 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)

Allowable Variation Parameters:

• Frequency Stability: Substitute parts may have equal or tighter (lower) frequency stability specifications than the original ±10ppm. Looser stability specifications are not acceptable for direct substitution.
• Operating Temperature Range: Substitute parts must support the minimum operating range of -20°C ~ 70°C or broader.

The identified substitute part 9B-14.7456MAAJ-B matches all mandatory parameters but differs in frequency stability specification (±30ppm versus ±10ppm). This represents a relaxation of the stability requirement and requires engineering evaluation based on application-specific timing tolerances.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (9B-14.7456MAAJ-B):

The 9B-14.7456MAAJ-B is electrically and mechanically compatible with the 9B-14.7456MEEJ-B for applications where the relaxed frequency stability specification of ±30ppm is acceptable. Both parts are ROHS3 compliant and REACH affected, maintaining regulatory alignment. Both parts are classified as obsolete, indicating limited future availability.

Selection Criteria:

1. Timing Tolerance Assessment: Applications requiring frequency stability tighter than ±30ppm cannot use the 9B-14.7456MAAJ-B as a direct substitute. Applications with timing tolerances of ±30ppm or greater can proceed with substitution.

2. Regulatory Compliance: Both parts maintain identical RoHS and REACH compliance status, suitable for applications with these regulatory requirements.

3. Inventory Availability: The 9B-14.7456MAAJ-B has higher current inventory (1573 Pcs) compared to the main part (741 Pcs), providing improved supply chain availability.

4. Obsolescence Planning: Both parts are obsolete. Long-term system support should evaluate non-obsolete alternatives with identical electrical specifications if available through the manufacturer or authorized distributors.

Frequently Asked Questions (FAQ)

Q: Can the 9B-14.7456MAAJ-B replace the 9B-14.7456MEEJ-B in any application?

A: The 9B-14.7456MAAJ-B is mechanically and electrically compatible for PCB assembly and circuit operation. However, the relaxed frequency stability (±30ppm versus ±10ppm) must be evaluated against application timing requirements. If the application circuit design accommodates ±30ppm frequency variation, substitution is valid. If the design requires ±10ppm or tighter stability, this substitute is not appropriate.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use identical HC-49/US through-hole packages with matching dimensions (0.453" L x 0.197" W, 0.145" max seated height) and identical mechanical specifications. Direct PCB footprint compatibility is confirmed.

Q: What is the significance of the frequency stability difference?

A: Frequency stability defines the maximum frequency deviation over the operating temperature range and time. The main part guarantees ±10ppm stability, while the substitute guarantees ±30ppm. In timing-critical applications (such as communication protocols, data synchronization, or precision instrumentation), this difference may affect system performance. In less critical applications, the relaxed specification may be acceptable.

Q: Are both parts still available for purchase?

A: Both parts are classified as obsolete. The 9B-14.7456MAAJ-B has higher current inventory (1573 Pcs) than the main part (741 Pcs), but neither part is in active production. Availability is limited to existing stock from authorized distributors.

Q: Do these parts have identical regulatory compliance?

A: Yes. Both parts are ROHS3 compliant and REACH affected, with identical ECCN (EAR99) and HTSUS (8541.60.0050) classifications. Regulatory requirements are satisfied identically by both parts.

Q: What should I do if neither part meets my application requirements?

A: Contact TXC CORPORATION or authorized distributors to identify non-obsolete 14.7456 MHz crystal alternatives with equivalent or superior specifications. Specify your required frequency stability, load capacitance, ESR, and operating temperature range to identify suitable modern replacements.