FL2500279Z Equivalent & Substitute Parts

Part Overview

The FL2500279Z is a 25 MHz crystal oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FL series. This surface mount crystal is designed for fundamental mode operation with a load capacitance of 12pF and operates across the temperature range of -20°C to 70°C. The component is actively produced and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications.

Substiute Parts

FL2500279Z

Diodes IncorporatedIn Stock: 3484FL2500279Z Datasheet

Current PartRFQ

7R-25.000MAAQ-T

TXC CORPORATIONIn Stock: 20227R-25.000MAAQ-T Datasheet

MFR RecommendedRFQ

8Y-25.000MAAE-T

TXC CORPORATIONIn Stock: 14678Y-25.000MAAE-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FL2500279Z is determined by the following critical parameters:

• Frequency: Must be 25 MHz
• Frequency Stability: Must be ±30ppm or better
• Operating Mode: Must be Fundamental
• Operating Temperature Range: Must cover -20°C to 70°C minimum
• Package / Case: Must be 4-SMD, No Lead for mechanical compatibility
• Mounting Type: Must be Surface Mount
• Load Capacitance: 12pF is the primary specification; deviations require circuit validation
• ESR: Variations are acceptable within circuit design tolerances
• Compliance: RoHS and MSL ratings must meet or exceed the original specification

The FL2500279Z has two qualified substitute parts: 7R-25.000MAAQ-T (TXC CORPORATION) and 8Y-25.000MAAE-T (TXC CORPORATION). Both maintain the core frequency, stability, operating mode, temperature range, and package requirements. Load capacitance differences and ESR variations are within acceptable substitution parameters for this crystal category.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain active product status and full compliance certifications. The 8Y-25.000MAAE-T offers the closest electrical match to the FL2500279Z, with identical load capacitance (12pF) and lower ESR (100 Ohms versus 60 Ohms). The 7R-25.000MAAQ-T provides an alternative with 10pF load capacitance and higher ESR (150 Ohms), suitable for applications where load capacitance tolerance permits deviation from the 12pF specification. All three parts are RoHS compliant and carry unlimited moisture sensitivity ratings, ensuring compatibility in standard manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can the 7R-25.000MAAQ-T substitute for the FL2500279Z if my circuit is designed for 12pF load capacitance?

A: The 7R-25.000MAAQ-T operates at 10pF load capacitance, which differs from the FL2500279Z specification of 12pF. Substitution is possible only if your circuit design accommodates 10pF load capacitance. Load capacitance mismatch may affect frequency accuracy and stability performance.

Q: What is the primary difference between the two substitute parts?

A: The 8Y-25.000MAAE-T matches the FL2500279Z load capacitance at 12pF with 100 Ohms ESR. The 7R-25.000MAAQ-T operates at 10pF load capacitance with 150 Ohms ESR. Both maintain identical frequency, stability, operating mode, temperature range, and package specifications.

Q: Are there packaging differences between these parts?

A: The FL2500279Z is supplied in Tape & Reel (TR) packaging. The substitute parts are supplied in Cut Tape (CT) packaging. Both packaging formats are compatible with standard surface mount assembly processes.

Q: Do all three parts meet the same compliance requirements?

A: All three parts are RoHS compliant and carry MSL 1 (Unlimited) ratings. The FL2500279Z is RoHS3 compliant, while the substitute parts are RoHS compliant. Both compliance levels are acceptable for equivalent substitution.

Q: What is the impact of ESR differences on circuit performance?

A: ESR variations (60 Ohms, 100 Ohms, and 150 Ohms) affect crystal oscillator circuit damping and startup characteristics. Selection depends on your oscillator circuit design specifications. Consult your circuit design documentation to confirm ESR compatibility.