FH2400049 24 MHz Crystal Equivalent & Substitute Parts

Part Overview

The FH2400049 is a 24 MHz fundamental mode crystal manufactured by Diodes Incorporated in the SaRonix-eCera™ FH series. This surface mount device operates across the -40°C to 85°C temperature range with ±30ppm frequency stability and is specified for 10pF load capacitance. The part is active and in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be maintained across the critical operating parameters: frequency, frequency stability, load capacitance, operating temperature range, and mounting configuration. Mechanical variations in package dimensions and ESR differences are acceptable when the electrical interface requirements are satisfied.

Substiute Parts

FH2400049

Diodes IncorporatedIn Stock: 4498FH2400049 Datasheet

Current PartRFQ

8Q-24.000MAHV-T

FTSIn Stock: 41518Q-24.000MAHV-T Datasheet

MFR RecommendedRFQ

8Z-24.000MAHE-T

TXC CORPORATIONIn Stock: 30668Z-24.000MAHE-T Datasheet

MFR RecommendedRFQ

8Z-24.000MAHQ-T

TXC CORPORATIONIn Stock: 31968Z-24.000MAHQ-T Datasheet

MFR RecommendedRFQ

FA-238 24.0000MD30X-W5

EPSONIn Stock: 56652FA-238 24.0000MD30X-W5 Datasheet

MFR RecommendedRFQ

ILCX20-FF5F8-24.000MHZ

ILSIIn Stock: 2129ILCX20-FF5F8-24.000MHZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Frequency: Must be 24 MHz (exact match required)
• Frequency Stability: Must be ±30ppm or better
• Operating Temperature Range: Must support -40°C to 85°C minimum
• Mounting Type: Must be Surface Mount, 4-SMD, No Lead configuration
• Operating Mode: Must be Fundamental mode
• Load Capacitance: Acceptable range is 8pF to 12pF (within typical circuit tolerance)
• ESR: Acceptable range is 50 to 150 Ohms (within typical oscillator design margins)

All identified substitute parts meet these criteria. Variations in package dimensions, ESR values within the acceptable range, and load capacitance within ±2pF of the primary specification do not prevent functional substitution in standard oscillator circuits.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with current manufacturing status and appropriate compliance certifications. Selection among substitutes should be based on:

ESR Considerations: The FH2400049 specifies 50 Ohms ESR. The 8Q-24.000MAHV-T, 8Z-24.000MAHE-T, and 8Z-24.000MAHQ-T each specify 100 Ohms ESR, which is within acceptable oscillator design margins. The FA-238 24.0000MD30X-W5 specifies 60 Ohms ESR, closest to the primary part. The ILCX20-FF5F8-24.000MHZ specifies 150 Ohms ESR, which remains within typical oscillator tolerance but represents the upper limit.

Load Capacitance Matching: The 8Z-24.000MAHQ-T and FA-238 24.0000MD30X-W5 specify 10pF load capacitance, matching the primary part exactly. The 8Q-24.000MAHV-T and ILCX20-FF5F8-24.000MHZ specify 8pF, and the 8Z-24.000MAHE-T specifies 12pF. Load capacitance variations of ±2pF are accommodated in standard oscillator circuit design.

Package Dimensions: The FH2400049, 8Z-24.000MAHE-T, and FA-238 24.0000MD30X-W5 share identical footprint dimensions (0.098" L x 0.079" W / 2.50mm x 2.00mm). The 8Q-24.000MAHV-T and ILCX20-FF5F8-24.000MHZ use a smaller 0.063" x 0.047" (1.60mm x 1.20mm) footprint, which is a direct mechanical substitute for space-constrained applications.

Compliance: All parts maintain ROHS3 or RoHS compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the FH2400049 with any of these parts without circuit modification?

A: Yes. All substitute parts operate at 24 MHz with ±30ppm stability across the -40°C to 85°C temperature range. Load capacitance variations of ±2pF and ESR variations up to 150 Ohms are within standard oscillator design tolerance. No circuit modification is required.

Q: What is the difference between 10pF, 8pF, and 12pF load capacitance specifications?

A: Load capacitance specifies the external capacitive load the crystal is designed to operate into. Variations within ±2pF of the primary specification are accommodated by standard oscillator circuits through minor tuning adjustments in the load network. The 8Z-24.000MAHQ-T (10pF) provides the closest electrical match to the FH2400049.

Q: Are there package size differences I should consider?

A: Yes. The FH2400049, 8Z-24.000MAHE-T, and FA-238 24.0000MD30X-W5 use the same 2.50mm x 2.00mm footprint. The 8Q-24.000MAHV-T and ILCX20-FF5F8-24.000MHZ use a smaller 1.60mm x 1.20mm footprint. Both footprints are 4-SMD, No Lead configurations and are mechanically interchangeable on PCBs designed for either size.

Q: What does ESR (Equivalent Series Resistance) mean for crystal selection?

A: ESR is the internal resistance of the crystal. Lower ESR values (50-60 Ohms) require less drive power from the oscillator circuit. Higher ESR values (100-150 Ohms) require more drive power but remain within acceptable limits for standard oscillator designs. All listed substitutes operate within typical oscillator specifications.

Q: Which substitute part is the closest electrical match to the FH2400049?

A: The 8Z-24.000MAHQ-T (TXC CORPORATION) provides the closest match with identical 10pF load capacitance, identical 2.50mm x 2.00mm package dimensions, and 100 Ohms ESR within standard design tolerance.

Q: Are all these parts currently in stock?

A: Inventory status is provided in the part data. The FH2400049 has 4400 pcs available. Substitute availability varies: 8Q-24.000MAHV-T (4128 pcs), 8Z-24.000MAHE-T (2984 pcs), 8Z-24.000MAHQ-T (3132 pcs), FA-238 24.0000MD30X-W5 (56566 pcs), and ILCX20-FF5F8-24.000MHZ (2035 pcs).