9B-36.000MEEJ-B Equivalent & Substitute Parts

Part Overview

The 9B-36.000MEEJ-B is a 36 MHz through-hole crystal manufactured by TXC CORPORATION, specified for ±10ppm frequency stability with 18pF load capacitance and 80 Ohms equivalent series resistance (ESR). The device operates in 3rd overtone mode within the temperature range of -20°C to 70°C and is housed in an HC-49/US package.

This part is classified as obsolete. Identifying equivalent and substitute components is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

9B-36.000MEEJ-B

TXC CORPORATIONIn Stock: 7549B-36.000MEEJ-B Datasheet

Current PartRFQ

ABL-36.000MHZ-B1U-T

Abracon LLCIn Stock: 900ABL-36.000MHZ-B1U-T Datasheet

SimilarRFQ

ABL-36.000MHZ-B4Y-T

Abracon LLCIn Stock: 827ABL-36.000MHZ-B4Y-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9B-36.000MEEJ-B is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 36 MHz
• Load Capacitance: 18pF
• Package / Case: HC-49/US
• Mounting Type: Through Hole
• Operating Temperature Range: -20°C to 70°C

Allowable Variation Parameters:

• Frequency Stability: The original part specifies ±10ppm. Substitute parts with equal or tighter (lower) frequency stability values are acceptable.
• ESR: The original part specifies 80 Ohms. Substitute parts with lower ESR values are acceptable as they represent improved performance characteristics.
• Operating Mode: Substitutes may operate in different modes (fundamental vs. 3rd overtone) provided all other electrical parameters are met.

Substitute parts are grouped based on their ability to meet or exceed the original specifications while maintaining full compatibility with the HC-49/US footprint and through-hole mounting requirements.

Parameter Comparison

Engineering Selection Recommendations

ABL-36.000MHZ-B1U-T (Primary Substitute)

The ABL-36.000MHZ-B1U-T is the preferred substitute for the 9B-36.000MEEJ-B. This part maintains identical frequency (36 MHz), load capacitance (18pF), frequency stability (±10ppm), and operating temperature range (-20°C to 70°C). The package and mounting type are identical (HC-49/US through-hole). The ESR is reduced to 40 Ohms, representing improved performance. The part is currently in active production status with 874 units in stock. Both parts are ROHS3 compliant and carry the same ECCN and HTSUS classifications.

ABL-36.000MHZ-B4Y-T (Secondary Substitute)

The ABL-36.000MHZ-B4Y-T is an acceptable substitute when frequency stability requirements permit relaxation to ±30ppm. This part shares the same frequency, load capacitance, package, mounting type, and operating temperature range as the original. The ESR is 40 Ohms. This part is currently in active production status with 766 units in stock and is ROHS3 compliant. Selection of this part is appropriate only when the application circuit design accommodates the wider frequency tolerance.

Frequently Asked Questions (FAQ)

Q: Can the ABL-36.000MHZ-B1U-T directly replace the 9B-36.000MEEJ-B in existing designs?

A: Yes. The ABL-36.000MHZ-B1U-T maintains all critical electrical parameters: 36 MHz frequency, ±10ppm stability, 18pF load capacitance, and identical HC-49/US package with through-hole mounting. The reduced ESR (40 Ohms vs. 80 Ohms) represents improved performance and does not create compatibility issues.

Q: What is the difference between 3rd overtone and fundamental operating modes?

A: The original 9B-36.000MEEJ-B operates in 3rd overtone mode, while the Abracon substitutes operate in fundamental mode. Both modes produce the same 36 MHz output frequency. The operating mode affects internal crystal behavior but does not impact circuit-level compatibility when frequency, load capacitance, and ESR specifications are met.

Q: When should the ABL-36.000MHZ-B4Y-T be selected instead of the ABL-36.000MHZ-B1U-T?

A: The ABL-36.000MHZ-B4Y-T should be selected only when the application circuit design accommodates the ±30ppm frequency tolerance. The original 9B-36.000MEEJ-B specifies ±10ppm stability. If the circuit requires ±10ppm or tighter tolerance, the ABL-36.000MHZ-B1U-T must be used.

Q: Are there any physical dimension differences between these parts?

A: All three parts use the HC-49/US package with identical length and width (0.453" L x 0.197" W / 11.50mm x 5.00mm). The seated height differs slightly: the original is 0.145" (3.68mm) maximum, while both Abracon parts are 0.138" (3.50mm) maximum. These dimensions are within standard HC-49/US tolerances and do not affect PCB mounting compatibility.

Q: Are all three parts RoHS compliant?

A: Yes. The 9B-36.000MEEJ-B, ABL-36.000MHZ-B1U-T, and ABL-36.000MHZ-B4Y-T are all ROHS3 compliant. All three parts carry the same ECCN (EAR99) and HTSUS (8541.60.0060) classifications.

Q: What is the inventory status of these parts?

A: The original 9B-36.000MEEJ-B has 671 units in stock but is classified as obsolete. The ABL-36.000MHZ-B1U-T has 874 units in stock and is in active production. The ABL-36.000MHZ-B4Y-T has 766 units in stock and is in active production.