7M-24.000MEEV-T 24 MHz SMD Crystal Equivalent & Substitute Parts

Part Overview

The 7M-24.000MEEV-T is a 24 MHz fundamental mode SMD crystal manufactured by TXC CORPORATION. This part operates at 24.0000 MHz with ±10ppm frequency stability and is housed in a 4-SMD, No Lead package measuring 3.20mm × 2.50mm. The device is RoHS Compliant with MSL 1 (Unlimited moisture sensitivity level) and maintains Active product status. Equivalent and substitute parts are identified based on matching frequency, stability, load capacitance, ESR, operating temperature range, package type, and mounting configuration to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value
Frequency	24 MHz
Frequency Stability	±10ppm
Load Capacitance	8pF
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-20°C to 70°C
Package / Case	4-SMD, No Lead
Size / Dimension	3.20mm × 2.50mm (0.126" L × 0.098" W)
Height - Seated (Max)	0.80mm (0.031")
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL (Moisture Sensitivity Level)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 7M-24.000MEEV-T is determined by the following critical parameters:

Primary Matching Criteria:

Frequency: 24 MHz (exact match required)
Frequency Stability: ±10ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature Range: -20°C to 70°C (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

Load Capacitance: 8pF (primary specification; parts with 6pF, 7pF, or 10pF load capacitance require circuit design verification)
ESR: 60 Ohms (primary specification; parts with 40, 50, or 100 Ohms ESR require circuit design verification)
Physical Dimensions: 3.20mm × 2.50mm (primary specification; smaller packages such as 2.50mm × 2.00mm or 2.00mm × 1.60mm may present PCB layout constraints)
Height: 0.80mm maximum (primary specification; lower profile packages such as 0.60mm or 0.50mm may affect assembly clearance)

Substitute parts are grouped into two categories:

Category A - Direct Substitutes (Identical Load Capacitance and ESR): Parts matching 8pF load capacitance and 60 Ohms ESR with identical package dimensions and height specifications.

Category B - Functional Substitutes (Alternate Load Capacitance or ESR): Parts matching 24 MHz frequency, ±10ppm stability, and fundamental mode operation but with different load capacitance (6pF, 7pF, or 10pF) or ESR (40, 50, or 100 Ohms). These parts require circuit design verification to confirm compatibility with the target application's oscillator circuit parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency	Frequency Stability	Load Capacitance	ESR (Ohms)	Package Size (mm)	Height (mm)	RoHS Status	Inventory (Pcs)
7M-24.000MEEV-T	TXC CORPORATION	24 MHz	±10ppm	8pF	60	3.20 × 2.50	0.80	RoHS Compliant	1137
7M-24.000MEEQ-T	TXC CORPORATION	24 MHz	±10ppm	10pF	60	3.20 × 2.50	0.80	RoHS Compliant	19162
402F24011CAR	CTS-Frequency Controls	24 MHz	±10ppm	10pF	100	2.00 × 1.60	0.55	ROHS3 Compliant	3456
403C11A24M00000	CTS-Frequency Controls	24 MHz	±10ppm	10pF	60	3.20 × 2.50	0.80	ROHS3 Compliant	44699
ABM10W-24.0000MHZ-6-B1U-T3	Abracon LLC	24 MHz	±10ppm	6pF	50	2.50 × 2.00	0.60	ROHS3 Compliant	4040
ABM10W-24.0000MHZ-8-B1U-T3	Abracon LLC	24 MHz	±10ppm	8pF	50	2.50 × 2.00	0.60	ROHS3 Compliant	27792
ABM11W-24.0000MHZ-6-B1U-T3	Abracon LLC	24 MHz	±10ppm	6pF	50	2.00 × 1.60	0.50	ROHS3 Compliant	3753
ABM11W-24.0000MHZ-7-B1U-T3	Abracon LLC	24 MHz	±10ppm	7pF	50	2.00 × 1.60	0.50	ROHS3 Compliant	5099
ABM11W-24.0000MHZ-8-B1U-T3	Abracon LLC	24 MHz	±10ppm	8pF	50	2.00 × 1.60	0.50	ROHS3 Compliant	2061
ABM8-24.000MHZ-10-B1U-T	Abracon LLC	24 MHz	±10ppm	10pF	50	3.20 × 2.50	0.80	ROHS3 Compliant	4870
ABM8-24.000MHZ-10-R40-B1U-T	Abracon LLC	24 MHz	±10ppm	10pF	40	3.20 × 2.50	0.80	ROHS3 Compliant	1722

Engineering Selection Recommendations

Direct Substitution (No Circuit Modification Required):

The 7M-24.000MEEQ-T (TXC CORPORATION) and 403C11A24M00000 (CTS-Frequency Controls) are functionally equivalent to the 7M-24.000MEEV-T with the following considerations:

7M-24.000MEEQ-T: Identical manufacturer (TXC CORPORATION), same package dimensions (3.20mm × 2.50mm), same height (0.80mm), same ESR (60 Ohms), and same operating temperature range. Load capacitance differs at 10pF versus 8pF. RoHS Compliant status maintained. Inventory availability is significantly higher (19,162 pcs).
403C11A24M00000: CTS-Frequency Controls alternative with identical package dimensions (3.20mm × 2.50mm), same height (0.80mm), same ESR (60 Ohms), and same operating temperature range. Load capacitance is 10pF. ROHS3 Compliant status. Highest inventory availability (44,699 pcs).

Conditional Substitution (Circuit Design Verification Required):

The following parts require verification of oscillator circuit design parameters before substitution:

ABM10W-24.0000MHZ-8-B1U-T3 (Abracon LLC): Matches 8pF load capacitance and fundamental mode operation. ESR is 50 Ohms (lower than 60 Ohms specification). Package dimensions are smaller (2.50mm × 2.00mm) with reduced height (0.60mm). High inventory availability (27,792 pcs). ROHS3 Compliant.
ABM8-24.000MHZ-10-B1U-T (Abracon LLC): Maintains identical package dimensions (3.20mm × 2.50mm) and height (0.80mm). Load capacitance is 10pF. ESR is 50 Ohms. ROHS3 Compliant. Inventory availability is 4,870 pcs.
ABM11W-24.0000MHZ-8-B1U-T3 (Abracon LLC): Matches 8pF load capacitance. ESR is 50 Ohms. Package is significantly smaller (2.00mm × 1.60mm) with reduced height (0.50mm). ROHS3 Compliant. Inventory availability is 2,061 pcs.

All substitute parts maintain 24 MHz frequency, ±10ppm stability, fundamental operating mode, -20°C to 70°C temperature range, 4-SMD No Lead package type, and surface mount configuration. RoHS compliance is maintained across all alternatives.

Frequently Asked Questions (FAQ)

Q1: Can I substitute the 7M-24.000MEEV-T with the 7M-24.000MEEQ-T?

The 7M-24.000MEEQ-T differs in load capacitance (10pF versus 8pF). Both parts share identical frequency (24 MHz), frequency stability (±10ppm), ESR (60 Ohms), package dimensions (3.20mm × 2.50mm), height (0.80mm), and operating temperature range (-20°C to 70°C). Substitution is possible if the oscillator circuit is designed to accommodate 10pF load capacitance. Verification with circuit design parameters is required.

Q2: What is the difference between ESR values in substitute parts?

ESR (Equivalent Series Resistance) affects crystal oscillator startup characteristics and frequency stability under load. The 7M-24.000MEEV-T specifies 60 Ohms ESR. Substitute parts with 50 Ohms ESR (Abracon LLC series) or 40 Ohms ESR (ABM8-24.000MHZ-10-R40-B1U-T) have lower resistance. Lower ESR values reduce power consumption and improve startup margin but require oscillator circuit verification to confirm compatibility with the target application's gain and load specifications.

Q3: Can I use a smaller package crystal as a substitute?

The 7M-24.000MEEV-T uses a 3.20mm × 2.50mm package with 0.80mm height. Smaller alternatives such as ABM11W series (2.00mm × 1.60mm with 0.50mm height) or ABM10W series (2.50mm × 2.00mm with 0.60mm height) require PCB layout verification. Smaller packages may present assembly clearance constraints and require confirmation that the target PCB footprint accommodates the reduced dimensions.

Q4: Are all substitute parts RoHS compliant?

The 7M-24.000MEEV-T is RoHS Compliant. All listed substitute parts maintain RoHS compliance (either RoHS Compliant or ROHS3 Compliant status). ROHS3 Compliant parts meet the same environmental standards as RoHS Compliant parts and are suitable for applications requiring RoHS certification.

Q5: What load capacitance should I select for substitution?

Load capacitance determines the frequency at which the crystal oscillates when connected to a specific oscillator circuit. The 7M-24.000MEEV-T specifies 8pF load capacitance. Substitute parts with 8pF load capacitance (ABM10W-24.0000MHZ-8-B1U-T3, ABM11W-24.0000MHZ-8-B1U-T3) are preferred for direct substitution. Parts with 10pF (7M-24.000MEEQ-T, 403C11A24M00000, ABM8-24.000MHZ-10-B1U-T) or 6pF/7pF load capacitance require oscillator circuit design verification to confirm frequency accuracy and stability.

Q6: Which substitute part has the highest inventory availability?

The 403C11A24M00000 (CTS-Frequency Controls) has the highest inventory availability at 44,699 pcs. This part matches the 7M-24.000MEEV-T in package dimensions (3.20mm × 2.50mm), height (0.80mm), and ESR (60 Ohms), with the exception of load capacitance (10pF versus 8pF).

Q7: Can I substitute based on package size alone?

No. Package size is a necessary but not sufficient condition for substitution. All critical parameters must match: frequency (24 MHz), frequency stability (±10ppm), operating mode (Fundamental), operating temperature range (-20°C to 70°C), and mounting type (Surface Mount). Load capacitance and ESR must be verified against oscillator circuit design specifications. Physical dimensions and height must be confirmed to fit the target PCB layout and assembly clearance requirements.

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