416F374X2AST Crystal Equivalent & Substitute Parts

Part Overview

The 416F374X2AST is a 37.4 MHz surface mount crystal manufactured by CTS-Frequency Controls, designed for fundamental mode operation in 4-SMD, No Lead packaging. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The crystal operates across -10°C to 60°C with ±15ppm frequency tolerance and 60 Ohms equivalent series resistance, suitable for timing and frequency control circuits requiring stable oscillation at 37.4 MHz.

Key Parameters

Parameter	Value
Frequency	37.4 MHz
Frequency Tolerance	±15ppm
Frequency Stability	±20ppm
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-10°C to 60°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.063" L x 0.047" W (1.60mm x 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)
Load Capacitance	Series
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 416F374X2AST is determined by strict adherence to the following critical parameters:

Frequency: Exact match at 37.4 MHz
Frequency Tolerance: ±15ppm maximum deviation
ESR: 60 Ohms
Operating Mode: Fundamental
Package / Case: 4-SMD, No Lead
Physical Dimensions: 0.063" L x 0.047" W (1.60mm x 1.20mm)
Height - Seated (Max): 0.018" (0.45mm)
Operating Temperature Range: -10°C to 60°C minimum
Load Capacitance: Series configuration

The substitute parts 416F374X2ASR and 416F374XXASR meet all critical electrical and mechanical parameters required for direct substitution. Both parts maintain identical frequency specifications, ESR characteristics, and physical form factors. The primary distinction lies in product status and packaging configuration.

Parameter Comparison

Parameter	416F374X2AST (Main Part)	416F374X2ASR (Substitute)	416F374XXASR (Substitute)
Manufacturer	CTS-Frequency Controls	CTS-Frequency Controls	CTS-Frequency Controls
Frequency	37.4 MHz	37.4 MHz	37.4 MHz
Frequency Tolerance	±15ppm	±15ppm	±15ppm
Frequency Stability	±20ppm	±20ppm	±15ppm
ESR	60 Ohms	60 Ohms	60 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental
Operating Temperature	-10°C to 60°C	-10°C to 60°C	-10°C to 60°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	0.063" L x 0.047" W (1.60mm x 1.20mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)	0.018" (0.45mm)	0.018" (0.45mm)
Load Capacitance	Series	Series	Series
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active
Packaging	Not specified	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Both 416F374X2ASR and 416F374XXASR are qualified substitutes for the discontinued 416F374X2AST based on electrical and mechanical parameter equivalence. Selection between the two active alternatives depends on product status and availability:

416F374X2ASR maintains identical frequency stability specification (±20ppm) to the original part and is currently active with 790 units in stock. This part provides direct functional equivalence with established supply availability.

416F374XXASR offers improved frequency stability at ±15ppm and is currently active with 957 units in stock. The enhanced stability specification and higher inventory level support long-term production continuity.

Both parts are ROHS3 compliant, carry MSL 1 rating, and are packaged in Tape & Reel configuration suitable for automated assembly processes. Physical footprint and electrical characteristics are identical across all three part numbers, ensuring PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can 416F374X2ASR and 416F374XXASR be used interchangeably with 416F374X2AST?

A: Yes. Both substitute parts meet all critical electrical and mechanical parameters: 37.4 MHz frequency, ±15ppm tolerance, 60 Ohms ESR, 4-SMD No Lead package, and identical physical dimensions. No circuit redesign or PCB layout changes are required.

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

A: The primary difference is frequency stability specification. 416F374X2ASR maintains ±20ppm stability matching the original part, while 416F374XXASR provides tighter ±15ppm stability. Both meet the ±15ppm tolerance requirement. Inventory levels differ, with 416F374XXASR currently stocked at higher quantities.

Q: Are there packaging differences between the main part and substitutes?

A: The main part 416F374X2AST packaging is not specified in available data. Both substitute parts are supplied in Tape & Reel (TR) packaging, standard for automated assembly. Physical dimensions and mounting characteristics remain identical.

Q: Do the substitute parts require different circuit design considerations?

A: No. All three parts operate in fundamental mode across -10°C to 60°C with series load capacitance configuration. Electrical characteristics, including ESR and frequency specifications, are equivalent. Existing circuit designs require no modification.

Q: What compliance certifications apply to the substitute parts?

A: Both 416F374X2ASR and 416F374XXASR are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level) rating. Certifications match the original part specifications.

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