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7M25077010 25 MHz ±20ppm Crystal 18pF SMD Equivalent & Substitute Parts
Part Overview
The TXC CORPORATION 7M25077010 is a 25 MHz surface mount crystal oscillator with 18pF load capacitance, ±20ppm frequency stability, and operating temperature range of -40°C to 85°C. This component is classified as Active product status and is RoHS Compliant. The 4-SMD, No Lead package (3.20mm x 2.50mm) is standard for modern electronic assemblies requiring compact form factors and automated placement.
Equivalent and substitute parts are identified when designs require alternative sourcing, inventory optimization, or when original manufacturer components become unavailable. Substitution validity depends strictly on matching critical electrical parameters: frequency (25 MHz), frequency stability (±20ppm), load capacitance compatibility, package type (4-SMD, No Lead), physical dimensions, and operating temperature range (-40°C to 85°C).
Substiute Parts
Key Parameters
| Parameter | Value | Unit | Substitution Criticality |
|---|---|---|---|
| Frequency | 25.0000 | MHz | Critical - Must Match Exactly |
| Frequency Stability | ±20 | ppm | Critical - Must Match or Better |
| Load Capacitance | 18 | pF | Critical - Affects Circuit Operation |
| Operating Temperature Range | -40 to 85 | °C | Critical - Application Dependent |
| Mounting Type | Surface Mount | - | Critical - Assembly Compatibility |
| Package / Case | 4-SMD, No Lead | - | Critical - PCB Layout Compatibility |
| Size / Dimension | 3.20 x 2.50 | mm | Critical - Footprint Match |
| Height - Seated (Max) | 0.80 | mm | Important - Clearance Verification |
| RoHS Status | RoHS Compliant | - | Important - Regulatory Compliance |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | - | Important - Storage & Handling |
Substitute Part Grouping Explanation
Substitution logic for the 7M25077010 is based on strict parameter matching across five critical dimensions:
Frequency Match: All substitute parts operate at 25.0000 MHz, identical to the main part.
Frequency Stability: All substitute parts maintain ±20ppm stability, meeting the original specification.
Load Capacitance Compatibility: Substitutes are grouped into two categories:
- 18pF Load Capacitance (Direct Substitutes): ABM8-25.000MHZ-D2X-T, ECS-250-18-33-JTN-TR, FL2500133. These parts match the original 18pF load capacitance exactly and are electrically interchangeable.
- 20pF Load Capacitance (Application-Dependent Substitutes): ECS-250-20-33-JTN-TR, FL2500213Z. These parts operate at 20pF load capacitance and require circuit verification before substitution, as load capacitance affects oscillation frequency and circuit stability.
- 16pF Load Capacitance (Limited Substitution): RH100-25.000-16-F-2020-EXT-TR. This part operates at 16pF load capacitance and is suitable only for applications designed to accommodate lower load capacitance values.
Package and Physical Dimensions: All substitute parts use 4-SMD, No Lead package with 3.20mm x 2.50mm footprint, ensuring PCB layout compatibility. Height variations (0.75mm to 0.80mm) are within acceptable assembly clearance tolerances.
Operating Temperature Range: All substitute parts support -40°C to 85°C operating temperature, matching the original specification.
Regulatory Compliance: All substitute parts are RoHS3 Compliant or RoHS Compliant, meeting environmental and regulatory requirements equivalent to or exceeding the original part.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Frequency (MHz) | Frequency Stability (ppm) | Load Capacitance (pF) | ESR (Ohms) | Package / Case | Size (mm) | Height Max (mm) | Operating Temp (°C) | RoHS Status | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 7M25077010 | TXC CORPORATION | 25.0000 | ±20 | 18 | - | 4-SMD, No Lead | 3.20 x 2.50 | 0.80 | -40 to 85 | RoHS Compliant | 943 |
| ABM8-25.000MHZ-D2X-T | Abracon LLC | 25.0000 | ±20 | 18 | 50 | 4-SMD, No Lead | 3.20 x 2.50 | 0.80 | -40 to 85 | ROHS3 Compliant | 1806 |
| ECS-250-18-33-JTN-TR | ECS Inc. | 25.0000 | ±20 | 18 | 40 | 4-SMD, No Lead | 3.20 x 2.50 | 0.80 | -40 to 85 | ROHS3 Compliant | 6007 |
| ECS-250-20-33-JTN-TR | ECS Inc. | 25.0000 | ±20 | 20 | 40 | 4-SMD, No Lead | 3.20 x 2.50 | 0.80 | -40 to 85 | ROHS3 Compliant | 3101 |
| FL2500133 | Diodes Incorporated | 25.0000 | ±20 | 18 | 40 | 4-SMD, No Lead | 3.20 x 2.50 | 0.75 | -40 to 85 | ROHS3 Compliant | 1305 |
| FL2500213Z | Diodes Incorporated | 25.0000 | ±20 | 20 | 30 | 4-SMD, No Lead | 3.20 x 2.50 | 0.75 | -40 to 85 | ROHS3 Compliant | 2605 |
| RH100-25.000-16-F-2020-EXT-TR | Raltron Electronics | 25.0000 | ±20 | 16 | 60 | 4-SMD, No Lead | 3.20 x 2.50 | 0.80 | -40 to 85 | ROHS3 Compliant | 10366 |
Engineering Selection Recommendations
Direct Substitutes (18pF Load Capacitance - Highest Compatibility):
ABM8-25.000MHZ-D2X-T (Abracon LLC) and ECS-250-18-33-JTN-TR (ECS Inc.) are direct electrical equivalents to the 7M25077010. Both maintain 18pF load capacitance, ±20ppm frequency stability, and -40°C to 85°C operating temperature. Both are ROHS3 Compliant, exceeding the RoHS Compliant status of the original part. ABM8-25.000MHZ-D2X-T offers 50 Ohms ESR, while ECS-250-18-33-JTN-TR provides 40 Ohms ESR. Selection between these two depends on circuit impedance requirements and ESR tolerance specifications.
FL2500133 (Diodes Incorporated, SaRonix-eCera™ FL series) is also an 18pF direct substitute with 40 Ohms ESR and ROHS3 Compliance. Height is 0.75mm (versus 0.80mm for the original), providing additional PCB clearance margin. This part is suitable for applications with tight vertical space constraints.
Application-Dependent Substitutes (20pF Load Capacitance):
ECS-250-20-33-JTN-TR and FL2500213Z both operate at 20pF load capacitance. These parts are substitutes only for applications where the circuit design accommodates 20pF load capacitance. Load capacitance affects crystal oscillation frequency and circuit stability; substitution requires verification that the application circuit is designed for 20pF operation. FL2500213Z offers lower ESR (30 Ohms) compared to ECS-250-20-33-JTN-TR (40 Ohms).
Limited Substitution (16pF Load Capacitance):
RH100-25.000-16-F-2020-EXT-TR (Raltron Electronics) operates at 16pF load capacitance with 60 Ohms ESR. This part is suitable only for applications specifically designed for 16pF load capacitance. The higher ESR (60 Ohms) may affect circuit performance in applications optimized for lower impedance values.
Regulatory and Compliance Considerations:
All substitute parts are ROHS3 Compliant or RoHS Compliant, meeting current environmental regulations. All parts are classified as Active product status, ensuring continued availability and manufacturer support. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements beyond standard ESD precautions.
Inventory and Availability:
ECS-250-18-33-JTN-TR offers the highest inventory availability (6007 Pcs), followed by RH100-25.000-16-F-2020-EXT-TR (10366 Pcs). For applications requiring immediate substitution with maximum supply assurance, these parts provide optimal availability.
Frequently Asked Questions (FAQ)
Q: Can I substitute the 7M25077010 with a 20pF load capacitance crystal?
A: Substitution with 20pF load capacitance crystals (ECS-250-20-33-JTN-TR or FL2500213Z) is possible only if your circuit design is verified to operate with 20pF load capacitance. Load capacitance directly affects the crystal's oscillation frequency and circuit stability. The original design was optimized for 18pF; changing to 20pF may shift the operating frequency outside acceptable tolerance. Circuit simulation or testing is required before production substitution.
Q: What is the difference between the substitute parts with different ESR values?
A: Equivalent Series Resistance (ESR) affects the crystal's impedance and power consumption in the oscillator circuit. Lower ESR (30-40 Ohms) generally results in lower power consumption and faster startup. Higher ESR (50-60 Ohms) may require circuit adjustment for optimal performance. Selection depends on your circuit design specifications and power budget requirements. The original 7M25077010 does not specify ESR; verify your circuit design documentation for ESR tolerance requirements.
Q: Are all substitute parts physically compatible with the original PCB footprint?
A: Yes. All substitute parts use the 4-SMD, No Lead package with 3.20mm x 2.50mm footprint, matching the original 7M25077010. Height variations (0.75mm to 0.80mm) are within standard PCB assembly clearance tolerances and do not affect placement compatibility. Verify your PCB design clearance specifications if vertical space is constrained.
Q: Which substitute part offers the best availability?
A: RH100-25.000-16-F-2020-EXT-TR (Raltron Electronics) offers the highest inventory (10366 Pcs), followed by ECS-250-18-33-JTN-TR (6007 Pcs). For applications requiring immediate sourcing with maximum supply assurance, these parts provide optimal availability. Note that RH100-25.000-16-F-2020-EXT-TR operates at 16pF load capacitance and is suitable only for applications designed for this specification.
Q: Do all substitute parts meet the same regulatory compliance as the original?
A: All substitute parts are ROHS3 Compliant or RoHS Compliant, meeting or exceeding the original part's RoHS Compliant status. All parts are REACH Unaffected and classified as EAR99 for export control purposes, matching the original part's regulatory profile. All parts are classified as Active product status, ensuring continued manufacturer support and availability.
Q: What is the difference between the Abracon and ECS 18pF substitutes?
A: ABM8-25.000MHZ-D2X-T (Abracon) and ECS-250-18-33-JTN-TR (ECS) are both direct 18pF substitutes with identical frequency, stability, and operating temperature. The primary difference is ESR: Abracon provides 50 Ohms, while ECS provides 40 Ohms. ECS offers higher inventory availability (6007 Pcs versus 1806 Pcs). Selection depends on your circuit's ESR tolerance requirements and preferred supplier.
Q: Can I use the Diodes FL2500133 as a direct replacement?
A: Yes. FL2500133 is a direct 18pF substitute with identical electrical specifications to the 7M25077010. The primary advantage is reduced height (0.75mm versus 0.80mm), providing additional PCB clearance. FL2500133 is ROHS3 Compliant and offers good inventory availability (1305 Pcs). This part is suitable for applications with tight vertical space constraints.
Q: What should I verify before substituting with a different load capacitance crystal?
A: Before substituting with 16pF or 20pF load capacitance crystals, verify: (1) Your circuit design documentation specifies the required load capacitance; (2) The oscillator circuit is designed to accommodate the alternative load capacitance value; (3) Frequency stability remains within acceptable tolerance with the alternative load capacitance; (4) ESR specifications are compatible with your circuit design. Load capacitance affects crystal frequency and circuit stability; substitution without verification may result in out-of-specification operation.
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