CTS-Frequency Controls 416F44035ITT Crystal Equivalent & Substitute Parts

Part Overview

The 416F44035ITT is a 44 MHz surface mount crystal oscillator manufactured by CTS-Frequency Controls, designed for applications requiring fundamental mode operation with 6pF load capacitance. This part is discontinued at DiGi Electronics, making identification of equivalent substitute components necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Frequency	44 MHz
Frequency Tolerance	±30ppm
Load Capacitance	6pF
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-40°C to 85°C
Package Type	4-SMD, No Lead
Physical Dimensions	0.063" L × 0.047" W (1.60mm × 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 416F44035ITT is determined by strict equivalence across the following critical parameters:

Frequency: 44 MHz (exact match required)
Frequency Tolerance: ±30ppm (exact match required)
Load Capacitance: 6pF (exact match required)
ESR: 60 Ohms (exact match required)
Operating Mode: Fundamental (exact match required)
Package Type: 4-SMD, No Lead (exact match required)
Physical Dimensions: 0.063" L × 0.047" W, 0.018" max height (exact match required)
Operating Temperature Range: -40°C to 85°C (exact match required)

The substitute parts 416F44033ITR and 416F44035ITR meet all critical electrical and mechanical parameters. The primary distinction is packaging format (Tape & Reel vs. bulk) and product status (Active vs. Discontinued).

Parameter Comparison

Parameter	416F44035ITT (Main)	416F44033ITR (Substitute)	416F44035ITR (Substitute)
Manufacturer	CTS-Frequency Controls	CTS-Frequency Controls	CTS-Frequency Controls
Frequency	44 MHz	44 MHz	44 MHz
Frequency Stability	±50ppm	±30ppm	±50ppm
Frequency Tolerance	±30ppm	±30ppm	±30ppm
Load Capacitance	6pF	6pF	6pF
ESR	60 Ohms	60 Ohms	60 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	0.063" L × 0.047" W (1.60mm × 1.20mm)	0.063" L × 0.047" W (1.60mm × 1.20mm)	0.063" L × 0.047" W (1.60mm × 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)	0.018" (0.45mm)	0.018" (0.45mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)
Inventory Availability	1094 Pcs	1005 Pcs	769 Pcs

Engineering Selection Recommendations

Both 416F44033ITR and 416F44035ITR are direct electrical and mechanical equivalents to the 416F44035ITT. Selection between these substitutes should be based on the following factors:

416F44033ITR: This part offers improved frequency stability at ±30ppm and maintains Active product status with CTS-Frequency Controls. It is suitable for applications where tighter frequency stability is beneficial within the same tolerance specification.

416F44035ITR: This part matches the frequency stability specification of the original 416F44035ITT at ±50ppm and is also Active. It provides direct parametric equivalence with the discontinued part.

Both substitutes are ROHS3 compliant, carry MSL 1 rating, and are available in Tape & Reel packaging format. Selection may depend on procurement volume requirements and packaging format compatibility with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 416F44033ITR and 416F44035ITR be used interchangeably with 416F44035ITT?

A: Yes. Both substitute parts meet all critical electrical parameters (44 MHz frequency, ±30ppm tolerance, 6pF load capacitance, 60 Ohms ESR) and mechanical specifications (4-SMD package, identical dimensions and height). The primary differences are product status (Active vs. Discontinued) and packaging format (Tape & Reel vs. bulk).

Q: What is the difference between 416F44033ITR and 416F44035ITR?

A: The primary difference is frequency stability specification. 416F44033ITR specifies ±30ppm stability, while 416F44035ITR specifies ±50ppm stability. Both meet the ±30ppm frequency tolerance requirement. All other electrical and mechanical parameters are identical.

Q: Are the substitute parts available in the same packaging as the original 416F44035ITT?

A: The substitute parts are supplied in Tape & Reel (TR) format, while the original 416F44035ITT was supplied in bulk packaging. Both formats contain the same component with identical electrical and mechanical specifications. Assembly equipment compatibility with Tape & Reel format should be confirmed for your production process.

Q: Do the substitute parts meet the same compliance requirements as the original part?

A: Yes. Both 416F44033ITR and 416F44035ITR are ROHS3 compliant, REACH unaffected, carry MSL 1 rating, and share the same ECCN (EAR99) and HTSUS classification as the original 416F44035ITT.

Q: What is the current availability status of these substitute parts?

A: Both 416F44033ITR and 416F44035ITR are Active products with current inventory: 416F44033ITR (1005 Pcs) and 416F44035ITR (769 Pcs). The original 416F44035ITT is discontinued at DiGi Electronics but 1094 Pcs remain in stock.

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