FH2400097 24 MHz Crystal Equivalent & Substitute Parts

Part Overview

The FH2400097 is a 24 MHz fundamental mode crystal manufactured by Diodes Incorporated in the SaRonix-eCera™ FH series. This surface mount device operates across the industrial temperature range of -40°C to 85°C and is specified for 8pF load capacitance with 60 Ohms equivalent series resistance. The part is ROHS3 compliant and carries MSL 1 rating, indicating unlimited moisture sensitivity protection.

Substitute parts are identified based on matching the core electrical specifications: 24 MHz frequency, ±10ppm frequency tolerance, ±15ppm frequency stability, fundamental operating mode, 4-SMD no-lead package configuration, and identical temperature operating range. Substitutes may vary in load capacitance (8pF to 10pF), ESR (40 to 100 Ohms), and physical dimensions while maintaining functional equivalence in circuit applications.

Key Parameters

Parameter	FH2400097 Specification
Manufacturer	Diodes Incorporated
Frequency	24 MHz
Frequency Tolerance	±10ppm
Frequency Stability	±15ppm
Load Capacitance	8pF
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)	0.028" (0.70mm)
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Frequency: 24 MHz (exact match required)
Frequency Tolerance: ±10ppm (exact match required)
Frequency Stability: ±15ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Operating Temperature Range: -40°C to 85°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: 1 (exact match required)

Substitute parts are grouped into two categories based on load capacitance and ESR characteristics:

Group A (8pF Load Capacitance): Parts with 8pF load capacitance matching the FH2400097 specification. These include Jauch Quartz JXS32 series variants with 40 Ohms ESR.

Group B (9pF Load Capacitance): Parts with 9pF load capacitance, representing a minor deviation from the primary specification. These include Jauch Quartz JXS32 series and EPSON TSX-3225 series variants with 40 Ohms ESR.

Group C (10pF Load Capacitance): Parts with 10pF load capacitance. These include CTS-Frequency Controls 402 series (100 Ohms ESR), ECS Inc. ECX-1637 series (80 Ohms ESR), and Jauch Quartz JXS21 series (80 Ohms ESR).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency	Load Capacitance	ESR (Ohms)	Size (mm)	Height Max (mm)	Product Status
FH2400097	Diodes Incorporated	24 MHz	8pF	60	2.50 x 2.00	0.70	Active
402F2401XIAR	CTS-Frequency Controls	24 MHz	10pF	100	2.00 x 1.60	0.55	Active
ECS-240-10-37-CWN-TR	ECS Inc.	24 MHz	10pF	80	2.00 x 1.60	0.55	Active
Q 24,0-JXS21-10-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	10pF	80	2.00 x 1.60	0.55	Active
Q 24,0-JXS21-9-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	9pF	80	2.00 x 1.60	0.55	Active
Q 24,0-JXS32-10-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	10pF	40	3.20 x 2.50	0.70	Active
Q 24,0-JXS32-8-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	8pF	40	3.20 x 2.50	0.70	Active
Q 24,0-JXS32-9-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	9pF	40	3.20 x 2.50	0.70	Active
TSX-3225 24.0000MF15X-AC3	EPSON	24 MHz	9pF	40	3.20 x 2.50	0.60	Active
TSX-3225 24.0000MF15X-AC6	EPSON	24 MHz	9pF	40	3.20 x 2.50	0.60	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance with MSL 1 rating, ensuring regulatory and environmental compatibility with the FH2400097.

For direct footprint compatibility: Q 24,0-JXS32-8-10/15-T1-FU-WA-LF maintains identical physical dimensions (3.20mm x 2.50mm) and maximum height (0.70mm) as the FH2400097, with matching 8pF load capacitance. This part offers the lowest ESR deviation at 40 Ohms versus the original 60 Ohms.

For compact PCB layouts: CTS-Frequency Controls 402F2401XIAR, ECS-240-10-37-CWN-TR, and Jauch Quartz JXS21 series provide smaller footprints (2.00mm x 1.60mm) with reduced height (0.55mm), accommodating space-constrained designs. Load capacitance increases to 10pF in these variants.

For load capacitance matching: Parts with 8pF specification (FH2400097 and Q 24,0-JXS32-8-10/15-T1-FU-WA-LF) are preferred when circuit design requires exact load capacitance. Parts with 9pF or 10pF load capacitance require circuit validation to confirm frequency accuracy within tolerance bands.

For ESR considerations: Jauch Quartz JXS32 series and EPSON TSX-3225 series offer lower ESR (40 Ohms) compared to the FH2400097 (60 Ohms), reducing power consumption and improving oscillator startup characteristics. CTS-Frequency Controls 402F2401XIAR presents higher ESR (100 Ohms), suitable for applications with higher drive levels.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 10pF load capacitance crystal for the 8pF FH2400097?

A: Substitution is possible only if the circuit design accommodates the load capacitance change. The oscillator circuit must be validated to confirm that frequency remains within the ±10ppm tolerance specification. Load capacitance affects the crystal's resonant frequency; circuits designed for 8pF may require tuning adjustments for 10pF operation.

Q: What is the impact of ESR differences between substitute parts?

A: ESR affects oscillator startup time, power consumption, and drive level requirements. Lower ESR (40 Ohms) reduces power dissipation and improves startup characteristics. Higher ESR (100 Ohms) requires higher drive levels from the oscillator circuit. The FH2400097 operates at 60 Ohms; substitutes with 40 or 80 Ohms ESR are generally compatible with standard oscillator designs.

Q: Are the smaller footprint substitutes (2.00mm x 1.60mm) compatible with FH2400097 PCB layouts?

A: Smaller footprint parts require PCB redesign. The FH2400097 uses a 2.50mm x 2.00mm footprint; CTS, ECS, and Jauch JXS21 series use 2.00mm x 1.60mm footprints. Pad patterns and land layouts differ and must be updated in the PCB design. Height differences (0.70mm versus 0.55mm) may also affect component clearance.

Q: Which substitute offers the closest electrical match to FH2400097?

A: Q 24,0-JXS32-8-10/15-T1-FU-WA-LF provides the closest match with identical 8pF load capacitance and matching physical dimensions (3.20mm x 2.50mm, 0.70mm height). ESR differs at 40 Ohms versus 60 Ohms, but this represents a favorable reduction in equivalent series resistance.

Q: Do all substitute parts carry the same compliance certifications?

A: All listed substitute parts are ROHS3 compliant with MSL 1 rating, matching the FH2400097 compliance profile. All parts operate across -40°C to 85°C temperature range with ±10ppm frequency tolerance and ±15ppm frequency stability. Regulatory compatibility is maintained across all substitutes.

Q: What packaging formats are available for these substitutes?

A: Most substitutes are supplied in Tape & Reel (TR) format. EPSON TSX-3225 24.0000MF15X-AC3 is available in Cut Tape (CT) & Digi-Reel® format. Packaging format selection depends on assembly process requirements and order quantities.

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