8Q-25.000MEEV-T Equivalent & Substitute Parts

Part Overview

The 8Q-25.000MEEV-T is a 25 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION in a 4-SMD, No Lead surface mount package. This component operates at 25 MHz with ±10ppm frequency stability and 8pF load capacitance, designed for applications requiring precise timing and frequency control. The part is Active in product status and RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Frequency	25	MHz
Frequency Stability	±10	ppm
Frequency Tolerance	±10	ppm
Load Capacitance	8	pF
ESR (Equivalent Series Resistance)	100	Ohms
Operating Mode	Fundamental	—
Operating Temperature Range	-20 to 70	°C
Mounting Type	Surface Mount	—
Package / Case	4-SMD, No Lead	—
Size / Dimension	0.063" L x 0.047" W (1.60mm x 1.20mm)	—
Height - Seated (Max)	0.016" (0.40mm)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the 8Q-25.000MEEV-T are classified into two categories based on electrical and mechanical parameter alignment:

Direct Parametric Equivalents share all critical electrical specifications: 25 MHz frequency, ±10ppm stability and tolerance, 8pF load capacitance, 100 Ohms ESR, fundamental operating mode, -20°C to 70°C temperature range, 4-SMD No Lead package, and 1.60mm x 1.20mm x 0.40mm maximum dimensions. These parts are interchangeable without circuit modification.

Load Capacitance Variants maintain frequency, stability, tolerance, ESR, operating mode, temperature range, package type, and physical dimensions but differ in load capacitance specification (6pF or 7pF instead of 8pF). These parts require circuit design verification to confirm load capacitance compatibility with the application.

ESR Variant (Jauch Quartz Q 25,0-JXS11-8-10/10-FU-LF) matches all parameters except ESR, which is specified at 90 Ohms instead of 100 Ohms. This part maintains 8pF load capacitance and all other electrical and mechanical specifications.

Substitution eligibility is determined by: Frequency (25 MHz), Frequency Stability (±10ppm), Frequency Tolerance (±10ppm), Load Capacitance (8pF preferred; 6pF or 7pF requires verification), ESR (100 Ohms preferred; 90 Ohms acceptable with circuit analysis), Operating Mode (Fundamental), Temperature Range (-20°C to 70°C), Package Type (4-SMD, No Lead), and Physical Dimensions (1.60mm x 1.20mm x 0.40mm).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (MHz)	Frequency Stability (ppm)	Load Capacitance (pF)	ESR (Ohms)	Operating Temperature (°C)	Package / Case	Size (mm)	RoHS Status	MSL	Product Status
8Q-25.000MEEV-T	TXC CORPORATION	25	±10	8	100	-20 ~ 70	4-SMD, No Lead	1.60 x 1.20 x 0.40	ROHS3 Compliant	1 (Unlimited)	Active
ABM12W-25.0000MHZ-6-B1U-T3	Abracon LLC	25	±10	6	100	-20 ~ 70	4-SMD, No Lead	1.60 x 1.20 x 0.40	ROHS3 Compliant	Not Applicable	Active
ABM12W-25.0000MHZ-7-B1U-T3	Abracon LLC	25	±10	7	100	-20 ~ 70	4-SMD, No Lead	1.60 x 1.20 x 0.40	ROHS3 Compliant	Not Applicable	Active
Q 25,0-JXS11-8-10/10-FU-LF	Jauch Quartz	25	±10	8	90	-20 ~ 70	4-SMD, No Lead	1.60 x 1.20 x 0.40	ROHS3 Compliant	1 (Unlimited)	Active
8Q-25.000MEEV-T (FTS)	FTS	25	±10	8	100	-20 ~ 70	4-SMD, No Lead	1.60 x 1.20 x 0.40	RoHS Compliant	1 (Unlimited)	Active
ABM12W-25.0000MHZ-8-B1U-T3	Abracon LLC	25	±10	8	100	-20 ~ 70	4-SMD, No Lead	1.60 x 1.20 x 0.40	ROHS3 Compliant	Not Applicable	Active

Engineering Selection Recommendations

Direct Replacement (No Circuit Modification Required):

The ABM12W-25.0000MHZ-8-B1U-T3 (Abracon LLC) and 8Q-25.000MEEV-T (FTS) are direct parametric equivalents to the primary 8Q-25.000MEEV-T (TXC CORPORATION). All three parts share identical electrical specifications (25 MHz, ±10ppm stability/tolerance, 8pF load capacitance, 100 Ohms ESR) and mechanical dimensions (1.60mm x 1.20mm x 0.40mm). All parts are Active in product status and RoHS3 compliant. The ABM12W-25.0000MHZ-8-B1U-T3 offers the highest inventory availability (15,604 units) and is available in Cut Tape and Digi-Reel packaging options.

Load Capacitance Variants (Circuit Verification Required):

The ABM12W-25.0000MHZ-6-B1U-T3 and ABM12W-25.0000MHZ-7-B1U-T3 (Abracon LLC) maintain all specifications except load capacitance, specified at 6pF and 7pF respectively. These parts are suitable only when the application circuit is designed to operate with the specified load capacitance value. Both parts are Active, RoHS3 compliant, and available in high inventory quantities (4,999 and 1,765 units respectively).

ESR Variant (Circuit Analysis Required):

The Q 25,0-JXS11-8-10/10-FU-LF (Jauch Quartz) matches all parameters except ESR, specified at 90 Ohms compared to the 100 Ohms of the primary part. This 10 Ohm difference may affect circuit performance in applications with tight ESR tolerances. The part is Active, RoHS3 compliant, and maintains 8pF load capacitance and all other electrical and mechanical specifications.

All substitute parts are Active in product status, RoHS3 compliant (or RoHS compliant), and operate within the -20°C to 70°C temperature range. Selection should be based on load capacitance compatibility, ESR tolerance requirements, packaging format availability, and inventory lead times.

Frequently Asked Questions (FAQ)

Q: Can the ABM12W-25.0000MHZ-8-B1U-T3 be used as a direct replacement for the 8Q-25.000MEEV-T?

A: Yes. The ABM12W-25.0000MHZ-8-B1U-T3 is a direct parametric equivalent with identical frequency (25 MHz), frequency stability (±10ppm), load capacitance (8pF), ESR (100 Ohms), operating temperature range (-20°C to 70°C), and physical dimensions (1.60mm x 1.20mm x 0.40mm). No circuit modification is required.

Q: What is the difference between the 6pF, 7pF, and 8pF load capacitance variants?

A: Load capacitance specifies the external capacitive load for which the crystal is calibrated to oscillate at the specified frequency. The 8Q-25.000MEEV-T is calibrated for 8pF load capacitance. The ABM12W-25.0000MHZ-6-B1U-T3 and ABM12W-25.0000MHZ-7-B1U-T3 are calibrated for 6pF and 7pF respectively. Using a part with incorrect load capacitance will result in frequency deviation. Substitution with load capacitance variants requires circuit design verification.

Q: How does the 90 Ohm ESR of the Jauch Quartz part compare to the 100 Ohm ESR of the primary part?

A: ESR (Equivalent Series Resistance) affects crystal oscillator circuit performance, including startup time and power consumption. The Q 25,0-JXS11-8-10/10-FU-LF specifies 90 Ohms ESR compared to 100 Ohms for the 8Q-25.000MEEV-T. This 10 Ohm difference may impact circuit behavior in applications with tight ESR tolerances or specific oscillator design requirements. Circuit analysis is required before substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS3 compliant or RoHS compliant, meeting environmental and hazardous substance restrictions.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel packaging provides components on cut tape segments or alternative reel formats, suitable for lower-volume or mixed-component orders. The ABM12W-25.0000MHZ-8-B1U-T3 is available in both formats.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL (Moisture Sensitivity Level) 1 indicates the lowest moisture sensitivity classification. MSL 1 (Unlimited) means the component has unlimited shelf life under normal storage conditions and does not require special moisture-control handling or baking procedures before soldering.

Q: Can I substitute the 8Q-25.000MEEV-T with the FTS 8Q-25.000MEEV-T?

A: Yes. The FTS 8Q-25.000MEEV-T is a parametric equivalent with identical electrical and mechanical specifications. Both parts share the same part number designation and are interchangeable. The FTS version is RoHS compliant with MSL 1 (Unlimited) rating.

Q: Which substitute part has the highest inventory availability?

A: The ABM12W-25.0000MHZ-8-B1U-T3 (Abracon LLC) has the highest inventory availability with 15,604 units in stock.

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