7M24070029 24 MHz ±10ppm Crystal 9pF SMD Equivalent & Substitute Parts

Part Overview

The 7M24070029 is a 24 MHz surface mount crystal manufactured by TXC CORPORATION, designed for applications requiring precise frequency control with 9pF load capacitance. This Active product operates across the industrial temperature range of -40°C to 85°C and meets RoHS compliance requirements. The part is packaged in a 4-SMD, No Lead configuration with compact dimensions of 3.20mm × 2.50mm and a maximum seated height of 0.80mm.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or when equivalent electrical and mechanical parameters are acceptable for the application.

Key Parameters

Parameter	Value	Unit
Frequency	24.0000	MHz
Frequency Tolerance	±10	ppm
Frequency Stability	±15	ppm
Load Capacitance	9	pF
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	4-SMD, No Lead	—
Size / Dimension	3.20 × 2.50	mm
Height - Seated (Max)	0.80	mm
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 7M24070029 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Frequency: 24.0000 MHz (exact match required)
Frequency Tolerance: ±10 ppm (exact match required)
Frequency Stability: ±15 ppm (exact match required)
Operating Temperature Range: -40°C to 85°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)

Secondary Substitution Criteria:

Load Capacitance: 9pF (preferred) or 10pF (acceptable with circuit verification)
Size / Dimension: 3.20mm × 2.50mm (preferred) or 2.00mm × 1.60mm (acceptable if PCB layout permits)
Height - Seated (Max): 0.80mm (preferred) or lower values (acceptable)
RoHS Status: ROHS3 Compliant or RoHS Compliant (both acceptable)
Moisture Sensitivity Level: 1 (Unlimited) (preferred)

Substitute parts are grouped into two categories:

Group A - Direct Equivalents (9pF Load Capacitance): Parts with identical 9pF load capacitance matching the original specification. These require no circuit redesign.

Group B - Compatible Alternatives (10pF Load Capacitance): Parts with 10pF load capacitance. These are electrically compatible but require verification that the application circuit can accommodate the different load capacitance value.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (MHz)	Frequency Tolerance (ppm)	Load Capacitance (pF)	ESR (Ohms)	Operating Temperature (°C)	Package	Size (mm)	Height Max (mm)	RoHS Status
7M24070029	TXC CORPORATION	24.0000	±10	9	—	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.80	RoHS Compliant
ECS-240-9-33B-CWN-TR	ECS Inc.	24.0000	±10	9	40	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.80	ROHS3 Compliant
FL2400097	Diodes Incorporated	24.0000	±10	9	50	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.75	ROHS3 Compliant
LFXTAL071177	IQD Frequency Products	24.0000	±10	9	40	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.80	ROHS3 Compliant
Q 24,0-JXS21-9-10/15-T1-FU-WA-LF	Jauch Quartz	24.0000	±10	9	80	-40 to 85	4-SMD, No Lead	2.00 × 1.60	0.55	ROHS3 Compliant
402F2401XIAR	CTS-Frequency Controls	24.0000	±10	10	100	-40 to 85	4-SMD, No Lead	2.00 × 1.60	0.55	ROHS3 Compliant
C3E-24.000-10-1015-X-R	Aker Technology Corp	24.0000	±10	10	100	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.75	ROHS3 Compliant
ECS-240-10-37-CWN-TR	ECS Inc.	24.0000	±10	10	80	-40 to 85	4-SMD, No Lead	2.00 × 1.60	0.55	ROHS3 Compliant
Q 24,0-JXS21-10-10/15-T1-FU-WA-LF	Jauch Quartz	24.0000	±10	10	80	-40 to 85	4-SMD, No Lead	2.00 × 1.60	0.55	ROHS3 Compliant
Q 24,0-JXS32-10-10/15-T1-FU-WA-LF	Jauch Quartz	24.0000	±10	10	40	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.70	ROHS3 Compliant
Q 24,0-JXS32-8-10/15-T1-FU-WA-LF	Jauch Quartz	24.0000	±10	8	40	-40 to 85	4-SMD, No Lead	3.20 × 2.50	0.70	ROHS3 Compliant

Engineering Selection Recommendations

Group A - Direct Equivalents (9pF Load Capacitance):

The following parts are direct electrical and mechanical equivalents of the 7M24070029 and require no circuit modification:

ECS-240-9-33B-CWN-TR (ECS Inc.): Identical dimensions, load capacitance, and operating range. ROHS3 Compliant. Inventory: 66,073 pcs.
FL2400097 (Diodes Incorporated): Identical load capacitance and operating range. Slightly reduced height (0.75mm vs 0.80mm). ROHS3 Compliant. Inventory: 5,959 pcs.
LFXTAL071177 (IQD Frequency Products): Identical dimensions, load capacitance, and operating range. ROHS3 Compliant. Inventory: 2,455 pcs.
Q 24,0-JXS21-9-10/15-T1-FU-WA-LF (Jauch Quartz): Identical load capacitance and operating range. Reduced package size (2.00mm × 1.60mm) and height (0.55mm). ROHS3 Compliant. Inventory: 2,707 pcs.

Group B - Compatible Alternatives (10pF Load Capacitance):

The following parts operate at 10pF load capacitance instead of 9pF. These are electrically compatible with the original specification but require circuit verification to confirm that the application can accommodate the different load capacitance:

C3E-24.000-10-1015-X-R (Aker Technology Corp): Identical dimensions to original. ROHS3 Compliant. Inventory: 8,116 pcs.
ECS-240-10-37-CWN-TR (ECS Inc.): Reduced package size (2.00mm × 1.60mm). ROHS3 Compliant. Inventory: 13,778 pcs.
Q 24,0-JXS21-10-10/15-T1-FU-WA-LF (Jauch Quartz): Reduced package size (2.00mm × 1.60mm). ROHS3 Compliant. Inventory: 7,086 pcs.
Q 24,0-JXS32-10-10/15-T1-FU-WA-LF (Jauch Quartz): Identical dimensions to original. ROHS3 Compliant. Inventory: 2,371 pcs.
402F2401XIAR (CTS-Frequency Controls): Reduced package size (2.00mm × 1.60mm). ROHS3 Compliant. Inventory: 21,392 pcs.

Load Capacitance Deviation:

The part Q 24,0-JXS32-8-10/15-T1-FU-WA-LF (Jauch Quartz) operates at 8pF load capacitance, which deviates from the original 9pF specification. This part is not recommended as a direct substitute without explicit circuit design verification.

All substitute parts listed maintain the required frequency tolerance of ±10 ppm, frequency stability of ±15 ppm, and operating temperature range of -40°C to 85°C. All substitute parts are ROHS3 Compliant or RoHS Compliant and meet REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q1: Can I use a 10pF load capacitance crystal as a substitute for the 9pF original?

A: Yes, 10pF load capacitance crystals are electrically compatible with applications designed for 9pF crystals. However, the application circuit must be verified to confirm that the oscillator circuit can accommodate the different load capacitance. The frequency tolerance and stability specifications remain identical at ±10 ppm and ±15 ppm respectively. Consult the application circuit design documentation before substitution.

Q2: What is the significance of ESR (Equivalent Series Resistance) in crystal selection?

A: ESR values range from 40 Ohms to 100 Ohms across the substitute parts listed. The ESR affects the crystal's ability to start oscillation and its power consumption in the circuit. Lower ESR values (40 Ohms) generally provide better performance characteristics. The original 7M24070029 does not specify an ESR value. When selecting a substitute, verify that the application circuit can operate with the specified ESR of the chosen part.

Q3: Are there package size differences between substitute parts?

A: Yes. The original 7M24070029 uses a 3.20mm × 2.50mm package with 0.80mm maximum height. Some substitutes use a smaller 2.00mm × 1.60mm package with 0.55mm maximum height. Smaller packages may be advantageous for space-constrained PCB layouts but require verification that the PCB footprint and assembly equipment can accommodate the different dimensions. Larger packages maintain identical footprints to the original.

Q4: Do all substitute parts meet RoHS compliance?

A: Yes. The original 7M24070029 is RoHS Compliant. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant, meeting current regulatory requirements. All parts maintain REACH Unaffected status.

Q5: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be exposed to moisture before soldering. MSL 1 (Unlimited) means the component has no moisture sensitivity restrictions and can be stored indefinitely without special drying procedures. The original 7M24070029 and most substitutes are rated MSL 1. This simplifies inventory management and assembly processes.

Q6: Which substitute part offers the best direct replacement?

A: ECS-240-9-33B-CWN-TR provides the most direct replacement. It matches the original 7M24070029 in frequency, tolerance, stability, load capacitance (9pF), package dimensions (3.20mm × 2.50mm), and height (0.80mm). It is ROHS3 Compliant and has the highest inventory availability (66,073 pcs) among 9pF alternatives.

Q7: Can I substitute a crystal with different operating temperature range?

A: No. All substitute parts listed maintain the identical operating temperature range of -40°C to 85°C as the original 7M24070029. This specification is critical for application reliability and must not be compromised.

Q8: What should I verify before using a substitute part?

A: Before substituting any part, verify: (1) Load capacitance compatibility with the application circuit, (2) PCB footprint and assembly equipment compatibility with package dimensions, (3) ESR compatibility with the oscillator circuit design, (4) Frequency tolerance and stability requirements are met, and (5) Operating temperature range covers the intended application environment.

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