9C-8.000MABK-T Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 9C-8.000MABK-T is an 8 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION in HC-49/US surface mount package. This part is classified as obsolete, necessitating identification of active equivalent components for ongoing production and maintenance applications. The crystal operates at 8.0000 MHz with ±30ppm frequency tolerance and 20pF load capacitance, designed for standard timing and clock generation circuits requiring stable frequency reference.

Substiute Parts

9C-8.000MABK-T

TXC CORPORATIONIn Stock: 7569C-8.000MABK-T Datasheet

Current PartRFQ

E1SEA18-8.000M TR

EcliptekIn Stock: 5994E1SEA18-8.000M TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9C-8.000MABK-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 8.0000 MHz (exact match required)
• Frequency Tolerance: ±30ppm (determines timing accuracy)
• Operating Mode: Fundamental (circuit design requirement)
• Package / Case: HC-49/US (mechanical and electrical interface)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Operating Temperature Range: -20°C to 70°C (environmental specification)

Allowable Variation Parameters:

• Load Capacitance: 18pF to 20pF (within typical circuit tuning range)
• ESR: 80 to 90 Ohms (acceptable for standard oscillator circuits)
• Physical dimensions: Minor variations acceptable within HC-49/US envelope
• Packaging format: Tape & Reel acceptable as alternative to standard packaging

The substitute part E1SEA18-8.000M TR from Ecliptek meets all mandatory matching criteria while operating within allowable variation limits for load capacitance and ESR.

Parameter Comparison

Engineering Selection Recommendations

The E1SEA18-8.000M TR from Ecliptek is a direct functional equivalent for the obsolete 9C-8.000MABK-T. Selection is based on the following engineering criteria:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Compliance Certifications: Both parts maintain ROHS3 compliance and identical MSL ratings (1 - Unlimited), confirming equivalent environmental and handling requirements.

Electrical Compatibility: The substitute operates at identical frequency (8.0000 MHz) and frequency tolerance (±30ppm), maintaining circuit timing specifications. Load capacitance variation of 2pF and ESR variation of 10 Ohms fall within standard oscillator circuit tuning tolerances and do not compromise functional performance.

Mechanical Compatibility: Both parts utilize HC-49/US surface mount package with identical operating temperature range (-20°C to 70°C), ensuring direct PCB footprint compatibility and thermal performance equivalence.

Packaging Format: The substitute is supplied in Tape & Reel format, standard for high-volume production environments and compatible with automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the E1SEA18-8.000M TR directly replace the 9C-8.000MABK-T without circuit modifications?

A: Yes. Both parts operate at 8.0000 MHz with ±30ppm tolerance in HC-49/US surface mount package. The 2pF load capacitance difference (20pF to 18pF) and 10 Ohm ESR difference (80 to 90 Ohms) are within standard oscillator circuit tuning ranges and do not require design changes.

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

A: Load capacitance determines the external tuning capacitor values in the oscillator circuit. The 2pF difference between 20pF and 18pF is accommodated by standard circuit design practices and does not affect frequency accuracy or stability specifications.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are ROHS3 compliant with identical MSL ratings (1 - Unlimited). The substitute maintains equivalent environmental and handling requirements.

Q: Why is the original part classified as obsolete?

A: The 9C-8.000MABK-T is no longer in active production by TXC CORPORATION. The E1SEA18-8.000M TR from Ecliptek is actively manufactured and represents the current equivalent solution for this frequency and package specification.

Q: Does the Tape & Reel packaging of the substitute affect compatibility?

A: No. Tape & Reel is the standard packaging format for surface mount components in production environments. It is compatible with automated pick-and-place assembly equipment and provides equivalent component protection and handling characteristics.

Q: What parameters must remain identical for substitution to be valid?

A: Frequency (8.0000 MHz), frequency tolerance (±30ppm), operating mode (Fundamental), package type (HC-49/US), mounting type (Surface Mount), and operating temperature range (-20°C to 70°C) must remain identical. Load capacitance and ESR may vary within specified tolerances.