FN2000121 Equivalent & Substitute Parts

Part Overview

The FN2000121 is a 20 MHz crystal oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FN series. This CMOS oscillator operates at 3.3V with Enable/Disable functionality in a 4-SMD, No Lead surface mount package. The device is Active status and ROHS3 compliant, suitable for applications requiring precise frequency generation with low power consumption in disabled mode.

Substitute parts are identified when design requirements change, inventory constraints occur, or performance specifications need adjustment within the allowed parameter ranges for this oscillator category.

Substiute Parts

FN2000121

Diodes IncorporatedIn Stock: 1144FN2000121 Datasheet

Current PartRFQ

FN2000115

Diodes IncorporatedIn Stock: 943FN2000115 Datasheet

UpgradeRFQ

FN2000118

Diodes IncorporatedIn Stock: 1751FN2000118 Datasheet

MFR RecommendedRFQ

SXO75C3A271-20.000M

Suntsu Electronics, Inc.In Stock: 4892SXO75C3A271-20.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the FN2000121 is determined by strict equivalence in the following parameters:

• Frequency: 20 MHz (exact match required)
• Output Type: CMOS (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Function: Enable/Disable (exact match required)
• Package Type: 4-SMD, No Lead (exact match required)
• Package Dimensions: 7.00mm x 5.00mm (exact match required)
• Mounting Type: Surface Mount (exact match required)

Variations permitted within substitution:

• Frequency Stability: ±25ppm to ±50ppm
• Operating Temperature Range: -40°C ~ 85°C to -20°C ~ 70°C
• Current Supply (Max): 15mA to 16mA
• Current Supply (Disable): 10µA or unspecified
• Height - Seated (Max): 1.60mm to 1.80mm
• Manufacturer: Diodes Incorporated or Suntsu Electronics, Inc.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity.

FN2000115 provides improved frequency stability at ±25ppm and extended operating temperature range (-40°C ~ 85°C), suitable for applications requiring tighter frequency tolerance and wider temperature operation.

FN2000118 maintains identical frequency stability (±50ppm) to the FN2000121 while offering extended operating temperature range (-40°C ~ 85°C), appropriate for designs requiring broader thermal performance without frequency tolerance changes.

SXO75C3A271-20.000M from Suntsu Electronics provides cross-manufacturer substitution with equivalent electrical specifications. The reduced seated height (1.60mm vs. 1.80mm) accommodates space-constrained PCB layouts. Current supply specification is 16mA maximum, within acceptable operating margins.

Frequently Asked Questions (FAQ)

Q: Can FN2000115 replace FN2000121 directly? Yes. FN2000115 is a direct substitute with identical package, frequency, voltage, and function. The improved frequency stability (±25ppm vs. ±50ppm) and extended temperature range (-40°C ~ 85°C vs. -20°C ~ 70°C) represent performance enhancements compatible with FN2000121 applications.

Q: What is the difference between FN2000118 and FN2000121? Both parts share identical frequency stability (±50ppm) and current specifications. FN2000118 extends the operating temperature range to -40°C ~ 85°C. Selection depends on thermal environment requirements.

Q: Is SXO75C3A271-20.000M compatible with FN2000121? Yes. The Suntsu part maintains all critical electrical parameters: 20 MHz frequency, 3.3V supply, CMOS output, and Enable/Disable function in the same 4-SMD, No Lead package. The 0.2mm reduction in seated height is compatible with standard PCB assembly processes.

Q: Are all substitutes ROHS3 compliant? Yes. FN2000115, FN2000118, and SXO75C3A271-20.000M are all ROHS3 compliant, maintaining regulatory equivalence with FN2000121.

Q: Which substitute offers the best frequency stability? FN2000115 provides ±25ppm frequency stability, superior to the ±50ppm specification of FN2000121, FN2000118, and SXO75C3A271-20.000M.

Q: Can I use these substitutes interchangeably on the same PCB? Yes. All substitutes share identical package dimensions (7.00mm x 5.00mm), mounting type (Surface Mount), and pinout configuration (4-SMD, No Lead), enabling direct PCB layout compatibility.