FD2500049 Equivalent & Substitute Parts

Part Overview

The FD2500049 is a 25 MHz XO (Standard) CMOS Oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FD series. This surface mount crystal oscillator operates at 2.5V with Enable/Disable functionality and CMOS output logic. The device is Active status and widely used in applications requiring stable 25 MHz frequency generation with low power consumption. Substitute parts may be required due to inventory constraints, packaging preferences, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

FD2500049

Diodes IncorporatedIn Stock: 885FD2500049 Datasheet

Current PartRFQ

FD2500050

Diodes IncorporatedIn Stock: 859FD2500050 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The FD2500050 is identified as a manufacturer-recommended substitute for the FD2500049. Substitution eligibility is determined by the following critical parameters that must remain compatible:

Core Compatibility Parameters:

• Frequency: 25 MHz (identical)
• Voltage - Supply: 2.5V (identical)
• Function: Enable/Disable (identical)
• Mounting Type: Surface Mount (identical)
• Package / Case: 4-SMD, No Lead (identical)
• Size / Dimension: 0.197" L x 0.126" W (5.00mm x 3.20mm) (identical)
• Operating Temperature: -20°C ~ 70°C (identical)
• Current - Supply (Max): 15mA (identical)
• Current - Supply (Disable) (Max): 10µA (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical)

Allowable Variations:

• Output Type: CMOS (FD2500049) vs. LVCMOS (FD2500050) — both are compatible logic families for 2.5V operation
• Frequency Stability: ±25ppm (FD2500049) vs. ±50ppm (FD2500050) — substitute has wider tolerance
• Height - Seated (Max): 0.051" (1.30mm) (FD2500049) vs. 0.053" (1.35mm) (FD2500050) — minimal height difference
• Packaging: Bulk (FD2500049) vs. Tape & Reel (TR) (FD2500050) — different supply format

Parameter Comparison

Engineering Selection Recommendations

Both FD2500049 and FD2500050 are Active status products from Diodes Incorporated's SaRonix-eCera™ FD series, ensuring long-term availability and manufacturing consistency. Both devices meet ROHS3 compliance and REACH requirements, making them suitable for regulated applications.

The FD2500049 provides tighter frequency stability at ±25ppm with standard CMOS output. The FD2500050 offers LVCMOS output with ±50ppm stability and is supplied in Tape & Reel format, which is preferred for high-volume manufacturing and automated assembly processes.

Selection between these parts should be based on:

• Output logic compatibility requirements (CMOS vs. LVCMOS)
• Frequency stability tolerance requirements for the application
• Supply chain and packaging format preferences (Bulk vs. Tape & Reel)
• PCB assembly process capabilities and height clearance constraints (0.051" vs. 0.053" maximum seated height)

Frequently Asked Questions (FAQ)

Q: Can FD2500050 directly replace FD2500049 in my circuit?

A: Yes, provided your circuit design accepts LVCMOS output logic and the ±50ppm frequency stability meets application requirements. Both devices operate at identical 2.5V supply voltage, frequency (25 MHz), and share the same 4-SMD, No Lead package footprint.

Q: What is the difference between CMOS and LVCMOS output?

A: LVCMOS (Low Voltage CMOS) is a subset of CMOS logic optimized for lower voltage operation. Both are compatible with 2.5V supply systems. LVCMOS typically offers improved noise immunity and lower power consumption in low-voltage applications.

Q: Does the height difference between FD2500049 (0.051") and FD2500050 (0.053") affect PCB design?

A: The height difference is 0.002" (0.05mm), which is negligible for most PCB designs. Both devices fit within standard surface mount assembly clearance specifications. Verify your specific PCB design constraints if height clearance is critical.

Q: Why does FD2500050 have wider frequency stability (±50ppm vs. ±25ppm)?

A: Frequency stability tolerance is a design specification. FD2500049 offers tighter tolerance. Applications requiring ±25ppm stability must use FD2500049. Applications tolerating ±50ppm can use either part.

Q: What is the difference between Bulk and Tape & Reel packaging?

A: Bulk packaging supplies loose components in containers, suitable for small quantities and manual assembly. Tape & Reel format winds components on continuous tape for automated pick-and-place assembly, preferred for high-volume production.

Q: Are both parts suitable for industrial temperature applications?

A: Both FD2500049 and FD2500050 operate across -20°C to 70°C. This is a commercial temperature range. For extended industrial or military temperature ranges, consult Diodes Incorporated for alternative product lines.

Q: Do both parts require special handling during assembly?

A: Both devices have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control measures. Standard ESD precautions for surface mount components apply.