CTS-Frequency Controls 402F54022ILT 54 MHz Crystal Equivalent & Substitute Parts

Part Overview

The 402F54022ILT is a 54 MHz fundamental mode crystal oscillator manufactured by CTS-Frequency Controls, designed for surface mount applications in 4-SMD, No Lead packaging. This part operates across the industrial temperature range of -40°C to 85°C with a load capacitance of 12pF and 60 Ohms equivalent series resistance. The 402F54022ILT is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Direct substitutes and parametric equivalents are available from the same manufacturer series, offering alternative frequency stability grades and load capacitance values to accommodate different circuit requirements.

Key Parameters

Parameter	Value
Frequency	54 MHz
Frequency Stability	±20ppm
Frequency Tolerance	±20ppm
Load Capacitance	12pF
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max)	0.022" (0.55mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 402F54022ILT is determined by the following critical parameters: frequency (54 MHz), operating mode (Fundamental), package type (4-SMD, No Lead), physical dimensions (2.00mm x 1.60mm), ESR (60 Ohms), operating temperature range (-40°C to 85°C), and compliance certifications (ROHS3, REACH Unaffected).

Substitute parts are grouped into three categories based on allowed parameter variations:

Direct Manufacturer Substitutes maintain identical frequency, ESR, package, and dimensions while offering improved frequency stability (±10ppm or ±15ppm) compared to the original ±20ppm specification. These parts are pin-compatible and mechanically interchangeable.

Similar Manufacturer Substitutes maintain frequency, ESR, package, dimensions, and operating temperature range but vary load capacitance (9pF or 10pF versus the original 12pF). These parts require circuit verification to confirm load capacitance compatibility with the application.

Parametric Equivalents provide identical electrical and mechanical specifications to the original part, differing only in packaging format (Tape & Reel versus cut tape) and product status (Active versus Discontinued).

Parameter Comparison

Part Number	Frequency	Frequency Stability	Frequency Tolerance	Load Capacitance	ESR	Package	Dimensions	Product Status	Inventory
402F54022ILT	54 MHz	±20ppm	±20ppm	12pF	60 Ω	4-SMD, No Lead	2.00mm x 1.60mm	Discontinued	915 Pcs
402F54012ILR	54 MHz	±20ppm	±10ppm	12pF	60 Ω	4-SMD, No Lead	2.00mm x 1.60mm	Active	690 Pcs
402F5401XILR	54 MHz	±15ppm	±10ppm	12pF	60 Ω	4-SMD, No Lead	2.00mm x 1.60mm	Active	668 Pcs
402F54022IAR	54 MHz	±20ppm	±20ppm	10pF	60 Ω	4-SMD, No Lead	2.00mm x 1.60mm	Active	964 Pcs
402F54022IJR	54 MHz	±20ppm	±20ppm	9pF	60 Ω	4-SMD, No Lead	2.00mm x 1.60mm	Active	992 Pcs
402F54022ILR	54 MHz	±20ppm	±20ppm	12pF	60 Ω	4-SMD, No Lead	2.00mm x 1.60mm	Active	674 Pcs

Engineering Selection Recommendations

402F54022ILR is the primary parametric equivalent, offering identical electrical specifications and physical dimensions to the 402F54022ILT with Active product status and Tape & Reel packaging. This part is the direct replacement for discontinued inventory applications.

402F54012ILR and 402F5401XILR provide improved frequency stability (±10ppm and ±15ppm respectively) while maintaining 12pF load capacitance and identical package specifications. These parts are suitable for applications requiring tighter frequency tolerance than the original ±20ppm specification.

402F54022IAR and 402F54022IJR maintain the original ±20ppm frequency stability and ±20ppm tolerance but feature reduced load capacitance values (10pF and 9pF respectively). Selection of these parts requires verification that the application circuit is designed for the specified load capacitance value.

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and identical operating temperature range (-40°C to 85°C), ensuring regulatory and environmental compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can 402F54012ILR replace 402F54022ILT directly? A: Yes. Both parts operate at 54 MHz with 12pF load capacitance, 60 Ohms ESR, and identical 4-SMD, No Lead packaging. The 402F54012ILR offers improved frequency stability (±10ppm versus ±20ppm), making it a direct upgrade for applications where tighter tolerance is acceptable.

Q: What is the difference between 402F54022IAR and 402F54022IJR? A: Both parts maintain 54 MHz frequency and ±20ppm stability specifications identical to the original 402F54022ILT. The primary difference is load capacitance: 402F54022IAR specifies 10pF while 402F54022IJR specifies 9pF. Selection depends on the application circuit's load capacitance requirement.

Q: Are all substitute parts available in the same packaging format? A: The original 402F54022ILT is supplied in cut tape format. Substitute parts 402F54012ILR, 402F5401XILR, 402F54022IAR, 402F54022IJR, and 402F54022ILR are supplied in Tape & Reel (TR) format. Both formats are compatible with standard pick-and-place assembly equipment.

Q: Does load capacitance affect circuit performance? A: Load capacitance is a critical parameter that affects crystal oscillation frequency and circuit stability. Parts with different load capacitance values (9pF, 10pF, or 12pF) must be verified for compatibility with the specific oscillator circuit design before substitution.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility with the original 402F54022ILT.

Q: What is the difference between frequency stability and frequency tolerance? A: Frequency stability (ppm) defines the maximum frequency variation over the operating temperature range and time. Frequency tolerance (ppm) defines the initial frequency accuracy at 25°C. Both parameters must be considered for application requirements.

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