7M-25.000MAHV-T Equivalent & Substitute Parts

Part Overview

The 7M-25.000MAHV-T is a 25 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications in 4-SMD, No Lead package configuration. This active product operates across the industrial temperature range of -40°C to 85°C with ±30ppm frequency stability and is RoHS Compliant with MSL 1 rating. Substitute parts are identified to address inventory availability, packaging format preferences, or specific load capacitance and ESR requirements within the 25 MHz crystal category.

Key Parameters

Parameter	Value	Unit
Frequency	25.000	MHz
Frequency Stability	±30	ppm
Load Capacitance	8	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 for the 7M-25.000MAHV-T is determined by the following critical parameters:

Primary Matching Criteria:

Frequency: 25.000 MHz (exact match required)
Frequency Stability: ±30ppm (exact match required)
Operating Mode: Fundamental (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 Compatibility Parameters:

Load Capacitance: 8pF (primary specification; substitutes with 6pF, 10pF acceptable within circuit design tolerance)
ESR: 60 Ohms (primary specification; substitutes range 80-150 Ohms acceptable within circuit design tolerance)
Physical Dimensions: Variations permitted within PCB layout constraints
RoHS/REACH Compliance: All substitutes maintain compliance status

Substitute parts are grouped by load capacitance variation (6pF, 8pF, 10pF) and ESR characteristics, as these parameters directly affect circuit oscillation frequency and startup behavior. All identified substitutes maintain identical frequency, stability, temperature range, and fundamental operating mode.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (MHz)	Frequency Stability (ppm)	Load Capacitance (pF)	ESR (Ohms)	Package	Size (mm)	Height (mm)	RoHS Status	Inventory (Pcs)
7M-25.000MAHV-T	TXC CORPORATION	25.000	±30	8	60	4-SMD, No Lead	3.20 x 2.50	0.80	RoHS Compliant	3473
7R-25.000MAHB-T	TXC CORPORATION	25.000	±30	6	150	4-SMD, No Lead	2.05 x 1.65	0.60	RoHS Compliant	1732
7R-25.000MAHQ-T	TXC CORPORATION	25.000	±30	10	150	4-SMD, No Lead	2.05 x 1.65	0.60	RoHS Compliant	3548
C2E-25.000-10-3030-X-M	Aker Technology Corp	25.000	±30	10	100	4-SMD, No Lead	2.50 x 2.00	0.65	ROHS3 Compliant	2000
C2E-25.000-10-3030-X-R	Aker Technology Corp	25.000	±30	10	100	4-SMD, No Lead	2.50 x 2.00	0.65	ROHS3 Compliant	3911
C3E-25.000-10-3030-X-R	Aker Technology Corp	25.000	±30	10	100	4-SMD, No Lead	3.20 x 2.50	0.75	ROHS3 Compliant	5798
ILCX18-FF5F10-25.000MHZ	ILSI	25.000	±30	10	80	4-SMD, No Lead	2.50 x 2.00	0.65	ROHS3 Compliant	1317
ILCX19-FF5F10-25.000MHZ	ILSI	25.000	±30	10	80	4-SMD, No Lead	2.00 x 1.60	0.55	ROHS3 Compliant	5912
R2520-25.000-8-F-3030-EXT-TR	Raltron Electronics	25.000	±30	8	100	4-SMD, No Lead	2.50 x 2.00	0.65	ROHS3 Compliant	3153

Engineering Selection Recommendations

Direct Substitutes (Identical Load Capacitance - 8pF):

The R2520-25.000-8-F-3030-EXT-TR from Raltron Electronics maintains the 8pF load capacitance specification of the primary part. This substitute differs in ESR (100 Ohms versus 60 Ohms) and physical dimensions (2.50 x 2.00 mm versus 3.20 x 2.50 mm). The part is ROHS3 Compliant with active product status and 3153 units in inventory.

Alternative Load Capacitance Substitutes (6pF and 10pF):

The 7R-25.000MAHB-T (6pF, 150 Ohms) and 7R-25.000MAHQ-T (10pF, 150 Ohms) from TXC CORPORATION provide load capacitance variations. Both maintain identical frequency, stability, and temperature specifications. The 6pF variant is the smallest footprint option (2.05 x 1.65 mm, 0.60 mm height). The 10pF variant offers higher inventory availability (3548 units).

Aker Technology Corp Series (10pF, 100 Ohms):

The C2E-25.000-10-3030-X-M, C2E-25.000-10-3030-X-R, and C3E-25.000-10-3030-X-R all feature 10pF load capacitance and 100 Ohms ESR. The C3E variant matches the primary part's physical dimensions (3.20 x 2.50 mm) with highest inventory (5798 units). The C2E variants offer compact dimensions (2.50 x 2.00 mm) with combined inventory of 5911 units. All are ROHS3 Compliant.

ILSI Series (10pF, 80 Ohms):

The ILCX18-FF5F10-25.000MHZ and ILCX19-FF5F10-25.000MHZ provide the lowest ESR option (80 Ohms) among 10pF substitutes. The ILCX19 variant offers the smallest footprint (2.00 x 1.60 mm, 0.55 mm height) with highest inventory among ILSI options (5912 units). Both are ROHS3 Compliant.

Selection Criteria:

Footprint Constraint: ILCX19-FF5F10-25.000MHZ for minimum space; 7R-25.000MAHB-T for 6pF requirement
ESR Sensitivity: ILCX18-FF5F10-25.000MHZ or ILCX19-FF5F10-25.000MHZ for lowest ESR (80 Ohms)
Inventory Priority: C3E-25.000-10-3030-X-R (5798 units) or ILCX19-FF5F10-25.000MHZ (5912 units)
Dimension Match: C3E-25.000-10-3030-X-R maintains primary part dimensions (3.20 x 2.50 mm)
Load Capacitance Match: R2520-25.000-8-F-3030-EXT-TR for 8pF specification

All substitutes maintain RoHS/REACH compliance and active product status.

Frequently Asked Questions (FAQ)

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

A: Load capacitance substitution requires circuit design verification. The 10pF variants (7R-25.000MAHQ-T, C2E series, C3E-25.000-10-3030-X-R, ILCX18-FF5F10-25.000MHZ, ILCX19-FF5F10-25.000MHZ) will affect oscillation frequency and startup behavior. Substitution is permissible only if the circuit design accommodates the load capacitance variation within the ±30ppm stability specification.

Q: What is the impact of ESR differences between the main part and substitutes?

A: The primary part specifies 60 Ohms ESR. Substitutes range from 80 Ohms (ILSI series) to 150 Ohms (7R series). Higher ESR increases power consumption and may affect startup margin. Lower ESR (80 Ohms) provides improved performance characteristics. ESR selection depends on circuit design requirements and oscillator drive level specifications.

Q: Are all substitutes physically compatible with the same PCB footprint?

A: No. The primary part measures 3.20 x 2.50 mm. The C3E-25.000-10-3030-X-R maintains identical dimensions. The 7R series (2.05 x 1.65 mm), C2E series (2.50 x 2.00 mm), ILCX18 (2.50 x 2.00 mm), and ILCX19 (2.00 x 1.60 mm) require PCB layout modification. Height variations range from 0.55 mm to 0.80 mm, affecting clearance requirements.

Q: Which substitute offers the best inventory availability?

A: The C3E-25.000-10-3030-X-R provides the highest inventory with 5798 units in stock. The ILCX19-FF5F10-25.000MHZ offers 5912 units. Both are suitable for high-volume applications.

Q: Do all substitutes maintain the same RoHS compliance status?

A: The primary part is RoHS Compliant. All identified substitutes are either RoHS Compliant or ROHS3 Compliant, maintaining regulatory compliance. REACH status is Unaffected for all parts.

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

A: Cut Tape packaging is suitable for lower-volume applications and manual assembly. Tape & Reel packaging is optimized for automated pick-and-place equipment in high-volume production. The primary part is available in Cut Tape (CT) & Digi-Reel®. Substitutes are available in both formats depending on the specific part number variant.

Q: Can I use the 6pF variant (7R-25.000MAHB-T) as a substitute?

A: The 6pF load capacitance differs from the 8pF specification. Substitution requires circuit design verification to confirm compatibility with the lower load capacitance. The 150 Ohms ESR is also significantly higher than the primary part's 60 Ohms, affecting startup behavior and power consumption.

Q: Which substitute has the lowest ESR?

A: The ILCX18-FF5F10-25.000MHZ and ILCX19-FF5F10-25.000MHZ both feature 80 Ohms ESR, the lowest among all substitutes. This provides improved oscillator performance characteristics compared to the primary part's 60 Ohms ESR baseline.

Q: Are there any frequency differences between the main part and substitutes?

A: All identified substitutes maintain the 25.000 MHz frequency specification with ±30ppm stability. Frequency is identical across all parts.

Q: What is MSL 1 rating and why is it important?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. All identified parts maintain MSL 1 rating, eliminating moisture-related handling constraints during storage and assembly.

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