Equivalent & Substitute Parts for TXC CORPORATION 9B10000172

Part Overview

The TXC CORPORATION 9B10000172 is a 10 MHz through-hole crystal oscillator with 20pF load capacitance and 40 Ohms equivalent series resistance (ESR), housed in an HC-49/US package. This component operates in fundamental mode across a temperature range of -20°C to 70°C with ±30ppm frequency stability. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and production continuity.

Substiute Parts

9B10000172

TXC CORPORATIONIn Stock: 7389B10000172 Datasheet

Current PartRFQ

9B-10.000MAAJ-B

TXC CORPORATIONIn Stock: 12959B-10.000MAAJ-B Datasheet

SimilarRFQ

HC49US-FF3F18-10.000MHZ

ILSIIn Stock: 2074HC49US-FF3F18-10.000MHZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9B10000172 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Frequency: 10 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -20°C to 70°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: HC-49/US (exact match required)

Secondary Compatibility Parameters:

• Load Capacitance: 20pF (primary specification; 18pF variants acceptable with circuit verification)
• ESR: 40 Ohms (primary specification; higher ESR values acceptable with circuit verification)

The substitute parts listed below maintain compatibility with the primary electrical specifications while accommodating minor variations in load capacitance and ESR within acceptable engineering tolerances for HC-49/US crystal applications.

Parameter Comparison

Engineering Selection Recommendations

9B-10.000MAAJ-B (TXC CORPORATION): This substitute maintains identical frequency, stability, ESR, and temperature specifications as the main part. The primary difference is load capacitance (18pF versus 20pF). Both parts are ROHS3 compliant and share identical physical dimensions and mounting characteristics. This part is classified as obsolete, matching the status of the main component.

HC49US-FF3F18-10.000MHZ (ILSI): This substitute maintains identical frequency, stability, and temperature specifications. The ESR is 60 Ohms (compared to 40 Ohms in the main part) and load capacitance is 18pF. This part is classified as active, providing long-term availability. Physical dimensions are within HC-49/US tolerance specifications. ROHS3 compliance and EAR99 classification are maintained.

Selection between these substitutes depends on component availability requirements and circuit tolerance for the specified parameter variations.

Frequently Asked Questions (FAQ)

Q: Can the 9B-10.000MAAJ-B directly replace the 9B10000172?

A: Yes. Both parts share identical frequency (10 MHz), frequency stability (±30ppm), ESR (40 Ohms), operating temperature range (-20°C to 70°C), and physical dimensions. The load capacitance difference (18pF versus 20pF) is within acceptable substitution parameters for HC-49/US crystal applications.

Q: What is the impact of the 18pF load capacitance in substitute parts versus the 20pF specification of the main part?

A: Load capacitance affects the crystal's operating frequency in the circuit. The 2pF difference between 20pF and 18pF represents a minor variation. Circuit design must account for this parameter during component selection.

Q: Can the HC49US-FF3F18-10.000MHZ be used as a substitute despite the 60 Ohms ESR versus 40 Ohms in the main part?

A: ESR affects power consumption and circuit stability. The 20 Ohms increase in ESR is a parameter variation that must be evaluated within the specific circuit application. This part maintains all other critical specifications including frequency, stability, and temperature range.

Q: What is the significance of the product status difference between obsolete and active parts?

A: The main part (9B10000172) and 9B-10.000MAAJ-B are both obsolete, indicating discontinued production. The HC49US-FF3F18-10.000MHZ is active, indicating current manufacturing and long-term availability. Active status provides supply chain continuity for new designs and ongoing production requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part and all listed substitutes are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: Do physical dimension variations between parts affect mounting compatibility?

A: All parts use the HC-49/US package standard. Minor dimensional variations (11.50mm versus 11.10mm length; 5.00mm versus 4.70mm width; 3.68mm versus 3.50mm height) remain within HC-49/US tolerance specifications and are compatible with standard through-hole PCB footprints designed for this package type.