7M24000021 24 MHz Crystal Equivalent & Substitute Parts

Part Overview

The 7M24000021 is a 24 MHz surface mount crystal oscillator manufactured by TXC CORPORATION, designed for applications requiring precise frequency generation at 24 MHz with ±30ppm stability. This Active product operates across the -20°C to 70°C temperature range and is housed in a compact 4-SMD, No Lead package measuring 3.20mm x 2.50mm. The component features 12pF load capacitance and is RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating. Substitute parts are identified when equivalent frequency, stability, load capacitance, and package specifications are available from alternative manufacturers or product lines, enabling design flexibility and supply chain continuity.

Substiute Parts

7M24000021

TXC CORPORATIONIn Stock: 303537M24000021 Datasheet

Current PartRFQ

7M-24.000MAAE-T

TXC CORPORATIONIn Stock: 63867M-24.000MAAE-T Datasheet

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FH2400032Z

Diodes IncorporatedIn Stock: 840FH2400032Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7M24000021 are qualified based on the following critical parameters that must align with the main part specification:

Primary Matching Criteria:

• Frequency: 24.0000 MHz (exact match required)
• Frequency Stability: ±30ppm (tolerance must not exceed this value)
• Load Capacitance: 12pF (primary specification) or 10pF (acceptable variance for fundamental mode operation)
• Package / Case: 4-SMD, No Lead (physical and electrical compatibility)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Operating Temperature Range: -20°C to 70°C (minimum coverage required)
• RoHS Compliance: Required for regulatory alignment

Secondary Considerations:

• ESR (Equivalent Series Resistance): When specified, values between 50–60 Ohms are acceptable for 24 MHz crystals
• Operating Mode: Fundamental mode operation is standard for this frequency class
• MSL Rating: 1 (Unlimited) ensures no moisture sensitivity constraints

Substitutes meeting these criteria enable direct replacement without circuit redesign or performance degradation.

Parameter Comparison

Engineering Selection Recommendations

7M-24.000MAAE-T (TXC CORPORATION)

This substitute maintains identical frequency, stability, load capacitance, and package dimensions to the 7M24000021. Both components are manufactured by TXC CORPORATION within the same 7M series, ensuring design continuity. The 7M-24.000MAAE-T specifies 60 Ohms ESR and Fundamental operating mode, providing additional technical clarity. RoHS Compliance and MSL 1 rating match the main part. This substitute is suitable for direct replacement in applications where the main part is unavailable.

FH2400032Z (Diodes Incorporated)

This substitute operates at the same 24 MHz frequency and ±30ppm stability as the main part. The load capacitance is specified as 10pF rather than 12pF; this variance is acceptable for fundamental mode crystal operation at 24 MHz. The FH2400032Z features a smaller footprint (2.50mm x 2.00mm versus 3.20mm x 2.50mm) and lower seated height (0.70mm versus 0.80mm), enabling use in space-constrained designs. ESR is specified at 50 Ohms. ROHS3 Compliance and MSL 1 rating satisfy regulatory requirements. PCB layout modifications may be required due to dimensional differences.

Both substitutes maintain Active product status and full compliance with RoHS and REACH requirements, ensuring regulatory alignment with the original 7M24000021 specification.

Frequently Asked Questions (FAQ)

Q: Can the 7M-24.000MAAE-T replace the 7M24000021 without circuit modification?

A: Yes. Both parts share identical frequency (24 MHz), stability (±30ppm), load capacitance (12pF), package type (4-SMD, No Lead), and physical dimensions (3.20mm x 2.50mm). No circuit redesign is required. The 7M-24.000MAAE-T is a direct substitute.

Q: What is the significance of the 10pF load capacitance on the FH2400032Z compared to the 12pF specification of the main part?

A: Load capacitance determines the crystal's resonant frequency when connected to a specific oscillator circuit. The 10pF specification on the FH2400032Z is acceptable for 24 MHz fundamental mode operation. However, the oscillator circuit must be designed or verified to accommodate 10pF load capacitance. If the original circuit is optimized for 12pF, substitution with the FH2400032Z may require circuit tuning or validation.

Q: Are there physical compatibility concerns when using the FH2400032Z?

A: The FH2400032Z has a smaller footprint (2.50mm x 2.00mm) and lower height (0.70mm) compared to the main part (3.20mm x 2.50mm, 0.80mm height). PCB pad layouts designed for the 7M24000021 may require modification to accommodate the FH2400032Z. Verify pad spacing and placement before assembly.

Q: Do all three parts meet the same regulatory and compliance standards?

A: Yes. The 7M24000021, 7M-24.000MAAE-T, and FH2400032Z are all RoHS Compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. The FH2400032Z specifies ROHS3 Compliance, which is a more recent standard revision and is fully compatible with RoHS requirements.

Q: What is the difference between the packaging formats listed for these parts?

A: The main part 7M24000021 is listed with packaging "-" (not specified in detail). The 7M-24.000MAAE-T and FH2400032Z are both specified as Tape & Reel (TR) packaging, which is standard for high-volume surface mount assembly. Tape & Reel format ensures automated pick-and-place compatibility and is the industry standard for SMD components.

Q: Can the ESR values (60 Ohms for 7M-24.000MAAE-T and 50 Ohms for FH2400032Z) affect circuit performance?

A: ESR (Equivalent Series Resistance) influences crystal impedance and oscillator startup characteristics. For 24 MHz crystals, ESR values between 50–60 Ohms are within acceptable ranges for standard oscillator circuits. Both substitutes fall within this range. However, if the original circuit has specific ESR requirements, verify compatibility with the substitute's ESR specification before implementation.

Q: What inventory levels are available for each part?

A: The 7M24000021 has 30,300 Pcs in stock. The 7M-24.000MAAE-T has 6,332 Pcs in stock. The FH2400032Z has 786 Pcs in stock. Inventory levels should be confirmed at the time of procurement.