AV-18.432MDHI-T Equivalent & Substitute Parts

Part Overview

The AV-18.432MDHI-T is an 18.432 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION. This surface mount device is designed for applications requiring precise frequency generation with tight tolerance specifications. The part is actively produced and maintains substantial inventory availability (802 pieces in stock). Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits component selection from qualified manufacturers meeting identical electrical and mechanical specifications.

Substiute Parts

AV-18.432MDHI-T

TXC CORPORATIONIn Stock: 851AV-18.432MDHI-T Datasheet

Current PartRFQ

IXA16-HF5F12-18.432MHZ

ILSIIn Stock: 4127IXA16-HF5F12-18.432MHZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AV-18.432MDHI-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 18.432 MHz (exact match required)
• Frequency Tolerance: ±20ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Package Type: 4-SMD, No Lead (exact match required)
• Physical Dimensions: 3.20mm x 2.50mm (exact match required)
• Mounting Type: Surface Mount (exact match required)
• AEC-Q200 Rating: Required for automotive and industrial applications
• RoHS Compliance: Required for regulatory adherence

Allowable Parameter Variations:

• Load Capacitance: Variation permitted within circuit design tolerance (16pF primary specification)
• ESR (Equivalent Series Resistance): Variation permitted based on circuit impedance requirements (120 Ohms primary specification)
• Height - Seated (Max): Minor variation acceptable within PCB assembly constraints
• Packaging Format: Variation permitted (Tape & Reel acceptable alternative to standard packaging)

The IXA16-HF5F12-18.432MHZ from ILSI qualifies as a substitute part based on matching all mandatory parameters while presenting allowable variations in load capacitance (12pF vs. 16pF) and ESR (70 Ohms vs. 120 Ohms).

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (AV-18.432MDHI-T): The AV-18.432MDHI-T remains the primary selection when available. This part carries active production status, AEC-Q200 certification, and RoHS compliance. Inventory availability of 802 pieces supports consistent supply chain management. The 16pF load capacitance and 120 Ohm ESR specifications are established design parameters for the target application circuit.

Substitute Part Selection (IXA16-HF5F12-18.432MHZ): The IXA16-HF5F12-18.432MHZ from ILSI is qualified as a substitute when the primary part is unavailable. This part meets all mandatory electrical and mechanical specifications including frequency, tolerance, temperature range, package type, and dimensions. Both parts carry AEC-Q200 certification and RoHS compliance (ROHS3 represents an updated compliance standard). The substitute part maintains active production status with higher inventory availability (4,044 pieces).

Parameter Variation Considerations: The load capacitance difference (12pF vs. 16pF) and ESR difference (70 Ohms vs. 120 Ohms) represent allowable variations within the 4-SMD crystal oscillator category. These parameters are circuit-dependent and must be evaluated within the specific application's oscillator circuit design. The reduced height of the substitute part (0.80mm vs. 0.90mm) provides improved PCB assembly clearance.

Compliance and Certification: Both parts satisfy automotive and industrial application requirements through AEC-Q200 certification. Both parts meet environmental compliance through RoHS standards. MSL 1 rating on both parts eliminates moisture sensitivity concerns during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the IXA16-HF5F12-18.432MHZ directly replace the AV-18.432MDHI-T without circuit modification?

A: Direct replacement is possible when the oscillator circuit design accommodates the load capacitance variation (12pF vs. 16pF) and ESR variation (70 Ohms vs. 120 Ohms). The circuit designer must verify that the substitute part's electrical characteristics remain within the application's frequency stability and phase noise requirements. Both parts operate at identical frequency and tolerance specifications.

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

A: Load capacitance determines the external capacitor values required in the oscillator circuit. The AV-18.432MDHI-T specifies 16pF load capacitance, while the IXA16-HF5F12-18.432MHZ specifies 12pF. The oscillator circuit must be designed or verified to operate correctly with the substitute part's load capacitance specification. Mismatched load capacitance can result in frequency deviation outside tolerance limits.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the AV-18.432MDHI-T and IXA16-HF5F12-18.432MHZ carry AEC-Q200 certification, which qualifies them for automotive-grade applications. AEC-Q200 certification indicates compliance with automotive reliability and quality standards.

Q: What does the MSL 1 rating mean for component handling?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited floor life. These components do not require special moisture control during storage or handling. Standard ESD precautions apply, but no baking or desiccant storage is required prior to assembly.

Q: How do the RoHS and ROHS3 compliance statuses differ?

A: Both parts are RoHS compliant. RoHS3 represents an updated compliance standard that includes additional restricted substances beyond the original RoHS directive. Both compliance levels satisfy current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the practical impact of the 0.10mm height difference between these parts?

A: The IXA16-HF5F12-18.432MHZ has a maximum seated height of 0.80mm compared to 0.90mm for the AV-18.432MDHI-T. This 0.10mm difference is negligible for most PCB assembly applications and does not affect component placement or clearance in standard surface mount designs.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability requires verification that the oscillator circuit design accommodates the electrical parameter variations. The identical frequency, tolerance, temperature range, package type, and physical dimensions support mechanical interchangeability. Electrical interchangeability depends on circuit-specific load capacitance and ESR requirements.

Q: What inventory considerations apply when selecting between these parts?

A: The AV-18.432MDHI-T maintains 802 pieces in stock, while the IXA16-HF5F12-18.432MHZ maintains 4,044 pieces in stock. The substitute part offers significantly higher inventory availability, which may support extended production runs or rapid fulfillment requirements.