9B-6.000MAAJ-B Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 9B-6.000MAAJ-B is a 6 MHz through-hole crystal oscillator manufactured by TXC CORPORATION. This component operates at a fundamental frequency with 18pF load capacitance and 80 Ohms equivalent series resistance in an HC-49/US package. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and procurement planning.

Substiute Parts

9B-6.000MAAJ-B

TXC CORPORATIONIn Stock: 9969B-6.000MAAJ-B Datasheet

Current PartRFQ

HC49US-FF3F18-6.000MHZ

ILSIIn Stock: 819HC49US-FF3F18-6.000MHZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9B-6.000MAAJ-B is determined by strict alignment of the following parameters:

Critical Parameters (Must Match Exactly):

• Frequency: 6 MHz
• Load Capacitance: 18pF
• Package / Case: HC-49/US
• Mounting Type: Through Hole
• Operating Mode: Fundamental

Acceptable Variation Parameters:

• Frequency Stability: ±30ppm (substitute must meet or exceed this specification)
• ESR: Tolerance range of ±20 Ohms from the specified 80 Ohms is acceptable within standard crystal manufacturing tolerances
• Operating Temperature Range: Substitute must cover the minimum range of -20°C ~ 70°C
• Physical Dimensions: Minor variations within HC-49/US standard envelope are acceptable

The HC49US-FF3F18-6.000MHZ from ILSI qualifies as a substitute based on matching all critical parameters and maintaining compatible electrical characteristics within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: HC49US-FF3F18-6.000MHZ (ILSI)

The HC49US-FF3F18-6.000MHZ is the qualified substitute for the obsolete 9B-6.000MAAJ-B. Selection rationale:

1. Functional Equivalence: All critical electrical parameters match the original specification, including frequency, load capacitance, operating mode, and temperature range.

2. Package Compatibility: Both components use the HC-49/US package with through-hole mounting, ensuring direct PCB compatibility without layout modifications.

3. Regulatory Compliance: The substitute maintains ROHS3 compliance and shares identical ECCN and HTSUS classifications, supporting supply chain continuity.

4. Product Status: The substitute is classified as Active, ensuring long-term availability and supply chain stability compared to the obsolete original part.

5. ESR Consideration: The substitute ESR of 100 Ohms represents a 20 Ohm increase from the original 80 Ohms specification. This variation falls within standard crystal manufacturing tolerances and does not compromise circuit functionality for typical oscillator applications.

6. Inventory Availability: 747 pieces of the substitute are available in new original condition, supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can the HC49US-FF3F18-6.000MHZ directly replace the 9B-6.000MAAJ-B without circuit modifications?

A: Yes. Both components share identical frequency, load capacitance, package type, and operating temperature specifications. The 20 Ohm ESR difference (80 Ohms vs. 100 Ohms) is within standard crystal manufacturing tolerances and does not require circuit redesign for typical oscillator applications.

Q: What does the HC-49/US package designation mean?

A: HC-49/US is a standardized through-hole crystal package format. Both the original and substitute components use this identical package, ensuring mechanical and electrical compatibility on printed circuit boards without modification.

Q: Why is the original part classified as obsolete?

A: The 9B-6.000MAAJ-B is no longer in active production by TXC CORPORATION. The substitute HC49US-FF3F18-6.000MHZ from ILSI provides equivalent functionality with active product status and ongoing availability.

Q: Does the frequency stability specification of ±30ppm apply to both parts?

A: Yes. Both the original and substitute components maintain ±30ppm frequency stability across the operating temperature range of -20°C to 70°C, ensuring equivalent timing accuracy in circuit applications.

Q: Are there any compliance or regulatory differences between the two parts?

A: No. Both components are ROHS3 compliant, share the same ECCN classification (EAR99), and carry identical HTSUS codes (8541.60.0050), supporting equivalent regulatory and supply chain treatment.

Q: What is the significance of the 18pF load capacitance specification?

A: The 18pF load capacitance is a circuit design parameter that must match between the original and substitute components. This specification determines the oscillation frequency and stability characteristics within the host circuit. Mismatched load capacitance would result in frequency deviation.

Q: Can the substitute be used in applications requiring the original part's exact ESR of 80 Ohms?

A: The substitute's 100 Ohm ESR is within acceptable engineering tolerance for standard oscillator circuits. However, applications with specific ESR requirements should be evaluated by the circuit design engineer to confirm compatibility.