7M-24.000MEFC-T Crystal Equivalent & Substitute Parts

Part Overview

The 7M-24.000MEFC-T is a 24 MHz surface mount crystal oscillator manufactured by TXC CORPORATION. This active product operates in fundamental mode with a load capacitance of 9pF and equivalent series resistance of 60 Ohms. The component is housed in a 4-SMD, No Lead package measuring 3.20mm x 2.50mm with a maximum seated height of 0.80mm. This crystal is RoHS Compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter ranges. Alternative sources provide design flexibility, supply chain redundancy, and inventory availability options.

Key Parameters

Parameter	Value	Unit
Frequency	24	MHz
Frequency Tolerance	±10	ppm
Load Capacitance	9	pF
ESR (Equivalent Series Resistance)	60	Ohms
Operating Mode	Fundamental	—
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	4-SMD, No Lead	—
Size / Dimension	3.20 x 2.50	mm
Height - Seated (Max)	0.80	mm
RoHS Status	RoHS Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

Frequency: 24 MHz
Frequency Tolerance: ±10 ppm
Operating Mode: Fundamental
Operating Temperature Range: -40°C to 85°C
Mounting Type: Surface Mount
Package / Case: 4-SMD, No Lead
MSL Rating: 1 (Unlimited)

Allowable Variation Parameters:

Load Capacitance: 9pF to 10pF (within circuit design tolerance)
ESR: 60 to 80 Ohms (within circuit impedance tolerance)
Physical Dimensions: Minor variations acceptable within PCB layout constraints
Frequency Stability: Values equal to or better than ±30ppm

Parts are grouped as substitutes when all mandatory parameters align and allowable variations remain within acceptable engineering tolerances for the application circuit.

Parameter Comparison

Parameter	7M-24.000MEFC-T (TXC)	T10GC1-24.000MHZ-T (MMD)	RH100-24.000-9-1015-EXT-TR (Raltron)	XF24M00000S409 (TGS)
Manufacturer	TXC CORPORATION	MMD	Raltron Electronics	TGS
Frequency	24 MHz	24 MHz	24 MHz	24 MHz
Frequency Tolerance	±10 ppm	±10 ppm	±10 ppm	±10 ppm
Load Capacitance	9 pF	10 pF	9 pF	9 pF
ESR	60 Ohms	80 Ohms	60 Ohms	60 Ohms
Frequency Stability	±30 ppm	±30 ppm	±15 ppm	±30 ppm
Operating Mode	Fundamental	Fundamental	Fundamental	Fundamental
Operating Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	3.20 x 2.50 mm	3.45 x 2.75 mm	3.20 x 2.50 mm	3.20 x 2.50 mm
Height - Seated (Max)	0.80 mm	0.75 mm	0.80 mm	0.80 mm
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

RH100-24.000-9-1015-EXT-TR (Raltron Electronics)

This part provides parametric equivalence with identical load capacitance (9pF) and ESR (60 Ohms). Frequency stability of ±15ppm exceeds the main part specification of ±30ppm. Physical dimensions and height match exactly. ROHS3 compliance and MSL Level 1 rating align with environmental requirements. Tape & Reel packaging supports high-volume production workflows.

XF24M00000S409 (TGS)

This part maintains exact parametric equivalence with 9pF load capacitance and 60 Ohms ESR. Frequency stability of ±30ppm matches the main part. Physical dimensions and height are identical. RoHS Compliant status and MSL Level 1 rating satisfy compliance requirements. Tape & Reel packaging and high inventory availability (600,806 pcs) support supply chain continuity.

T10GC1-24.000MHZ-T (MMD)

This part operates at 24 MHz with ±10ppm frequency tolerance and ±30ppm stability. Load capacitance is 10pF with 80 Ohms ESR, representing allowable variations within circuit design tolerance. Physical dimensions are 3.45 x 2.75mm with 0.75mm maximum height, requiring PCB layout verification for space constraints. ROHS3 compliance and MSL Level 1 rating meet environmental standards. Cut Tape packaging is suitable for lower-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the T10GC1-24.000MHZ-T substitute for the 7M-24.000MEFC-T in all applications?

A: The T10GC1-24.000MHZ-T operates at the same 24 MHz frequency with identical tolerance and stability specifications. However, load capacitance differs (10pF vs. 9pF) and ESR is higher (80 Ohms vs. 60 Ohms). Circuit design must accommodate these parameter variations. Physical dimensions are also larger (3.45 x 2.75mm vs. 3.20 x 2.50mm), requiring PCB layout verification.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the current version of the directive. Both statuses satisfy RoHS requirements for component selection.

Q: Are all substitute parts available in the same packaging format?

A: No. The 7M-24.000MEFC-T is supplied in standard packaging. RH100-24.000-9-1015-EXT-TR and XF24M00000S409 are supplied in Tape & Reel format for automated assembly. T10GC1-24.000MHZ-T is supplied in Cut Tape format. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Which substitute part has the best frequency stability?

A: RH100-24.000-9-1015-EXT-TR offers ±15ppm frequency stability, which exceeds the main part specification of ±30ppm. This represents superior long-term frequency accuracy.

Q: Can I use these parts interchangeably on the same PCB?

A: Physical dimensions vary between parts. RH100-24.000-9-1015-EXT-TR and XF24M00000S409 match the main part dimensions exactly (3.20 x 2.50mm). T10GC1-24.000MHZ-T is larger (3.45 x 2.75mm) and requires PCB layout verification. All parts use identical 4-SMD, No Lead package type and mounting method.

Q: What is the significance of MSL Level 1 rating?

A: MSL Level 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry this rating, eliminating moisture sensitivity concerns.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either RoHS Compliant or ROHS3 Compliant status, meeting environmental and regulatory requirements.

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