CTS-Frequency Controls 416F360X3AAT 36 MHz Crystal Equivalent & Substitute Parts

Part Overview

The CTS-Frequency Controls 416F360X3AAT is a 36 MHz fundamental mode crystal oscillator in a 4-SMD, No Lead surface mount package. This part is discontinued at DiGi Electronics but remains available in inventory (914 pcs). The 36 MHz frequency with ±15 ppm tolerance and 10 pF load capacitance serves applications requiring precise timing references in compact form factors. Due to discontinuation status, equivalent and substitute parts from the same manufacturer series provide direct functional alternatives with identical or compatible electrical and mechanical specifications.

Key Parameters

Parameter	Value
Frequency	36 MHz
Frequency Tolerance	±15 ppm
Load Capacitance	10 pF
ESR (Equivalent Series Resistance)	80 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 (1.60 mm x 1.20 mm)
Height - Seated (Max)	0.018" (0.45 mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 416F360X3AAT is determined by the following critical parameters: frequency (36 MHz), frequency tolerance (±15 ppm), ESR (80 Ohms), operating mode (Fundamental), package type (4-SMD, No Lead), physical dimensions (1.60 mm x 1.20 mm), and environmental compliance (ROHS3, MSL 1).

Substitute parts are grouped into two categories:

Load Capacitance Variants (416F360X3AKR, 416F360X3ALR): These parts maintain identical frequency, tolerance, ESR, package, and dimensions but differ in load capacitance (8 pF and 12 pF respectively). Selection depends on circuit design requirements for load capacitance matching.

Parametric Equivalents (416F360X2AAR, 416F360X3AAR, 416F360XXAAR): These parts maintain the 10 pF load capacitance specification identical to the main part. Differences exist in frequency stability ratings (±20 ppm, ±30 ppm, ±15 ppm respectively), which represent tighter or equivalent stability performance. All maintain identical package, dimensions, ESR, and compliance certifications.

Parameter Comparison

Part Number	Frequency	Frequency Tolerance	Frequency Stability	Load Capacitance	ESR	Package	Product Status	Inventory (pcs)
416F360X3AAT	36 MHz	±15 ppm	±30 ppm	10 pF	80 Ω	4-SMD, No Lead	Discontinued	914
416F360X3AKR	36 MHz	±15 ppm	±30 ppm	8 pF	80 Ω	4-SMD, No Lead	Active	786
416F360X3ALR	36 MHz	±15 ppm	±30 ppm	12 pF	80 Ω	4-SMD, No Lead	Active	1069
416F360X2AAR	36 MHz	±15 ppm	±20 ppm	10 pF	80 Ω	4-SMD, No Lead	Active	769
416F360X3AAR	36 MHz	±15 ppm	±30 ppm	10 pF	80 Ω	4-SMD, No Lead	Active	750
416F360XXAAR	36 MHz	±15 ppm	±15 ppm	10 pF	80 Ω	4-SMD, No Lead	Active	1113

Engineering Selection Recommendations

Direct Replacement (Identical Load Capacitance): For applications requiring the original 10 pF load capacitance specification, select from 416F360X2AAR, 416F360X3AAR, or 416F360XXAAR. All three are active products with current availability. The 416F360XXAAR offers the tightest frequency stability (±15 ppm) and highest inventory (1113 pcs). The 416F360X2AAR provides intermediate stability (±20 ppm) with 769 pcs available. The 416F360X3AAR matches the original frequency stability specification (±30 ppm) with 750 pcs available.

Load Capacitance Optimization: If circuit design permits load capacitance adjustment, 416F360X3AKR (8 pF) and 416F360X3ALR (12 pF) are active alternatives. Both maintain identical frequency tolerance, ESR, and package specifications. The 416F360X3ALR has the highest inventory availability (1069 pcs).

Compliance and Packaging: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical physical dimensions (1.60 mm x 1.20 mm). All are available in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 416F360X3AKR (8 pF) or 416F360X3ALR (12 pF) directly replace 416F360X3AAT (10 pF)?

A: Direct replacement depends on circuit load capacitance requirements. The crystal frequency and tolerance remain identical across all three variants. If the circuit is designed for 10 pF load capacitance, substitution with 8 pF or 12 pF variants requires circuit verification to confirm load capacitance compatibility. Mismatched load capacitance may result in frequency deviation outside tolerance specifications.

Q: What is the difference between frequency tolerance and frequency stability?

A: Frequency tolerance (±15 ppm for all parts) specifies the initial accuracy of the crystal frequency at room temperature. Frequency stability (ranging from ±15 ppm to ±30 ppm across variants) specifies the maximum frequency variation over the operating temperature range (-10°C to 60°C). Tighter stability ratings indicate better frequency retention across temperature extremes.

Q: Are all substitute parts suitable for automated assembly?

A: Yes. All substitute parts are supplied in Tape & Reel (TR) packaging and maintain identical 4-SMD, No Lead package specifications with dimensions of 1.60 mm x 1.20 mm and maximum seated height of 0.45 mm, compatible with standard surface mount assembly equipment.

Q: Which substitute part offers the best long-term availability?

A: All substitute parts carry Active product status, indicating current manufacturing and distribution. The 416F360XXAAR has the highest current inventory (1113 pcs) and offers the tightest frequency stability specification (±15 ppm), making it suitable for applications requiring superior frequency retention.

Q: Do all parts meet the same environmental compliance standards?

A: Yes. All parts listed are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. All share identical ECCN (EAR99) and HTSUS (8541.60.0060) classifications.

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