ASE-44.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASE-44.000MHZ-LR-T is a 44 MHz XO (Standard) CMOS oscillator manufactured by Abracon LLC, designed for applications requiring a crystal-based frequency reference with enable/disable functionality. This part operates at 3.3V supply voltage and is housed in a compact 4-SMD, No Lead surface mount package. The product maintains Active status with full RoHS3 compliance and REACH unaffected certification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range.

Key Parameters

Parameter	Value
Frequency	44 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Frequency Stability	±25ppm (Main Part)
Operating Temperature Range	-40°C ~ 85°C
Package / Case	4-SMD, No Lead
Mounting Type	Surface Mount
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.047" (1.20mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the ASE-44.000MHZ-LR-T is determined by strict equivalence across the following critical parameters:

Frequency: 44 MHz (exact match required)
Output Type: CMOS (exact match required)
Supply Voltage: 3.3V (exact match required)
Function: Enable/Disable (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Mounting Type: Surface Mount (exact match required)
Physical Dimensions: 0.126" L x 0.098" W, Height 0.047" max (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
Compliance: RoHS3 Compliant, REACH Unaffected (exact match required)

The identified substitute part ASE-44.000MHZ-L-C-T maintains all critical electrical and mechanical parameters. Frequency stability differs (±50ppm vs ±25ppm), which represents a relaxation of the tolerance specification and does not prevent substitution in applications where the main part's tighter tolerance is not required.

Parameter Comparison

Parameter	ASE-44.000MHZ-LR-T (Main)	ASE-44.000MHZ-L-C-T (Substitute)
Manufacturer	Abracon LLC	Abracon LLC
Series	ASE	ASE
Product Status	Active	Active
Type	XO (Standard)	XO (Standard)
Frequency	44 MHz	44 MHz
Output	CMOS	CMOS
Voltage - Supply	3.3V	3.3V
Function	Enable/Disable	Enable/Disable
Frequency Stability	±25ppm	±50ppm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Current - Supply (Max)	19mA	19mA
Current - Supply (Disable) (Max)	10µA	10µA
Mounting Type	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.047" (1.20mm)	0.047" (1.20mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

Both the ASE-44.000MHZ-LR-T and ASE-44.000MHZ-L-C-T are Active products from Abracon LLC with identical RoHS3 compliance and REACH unaffected status. The parts are electrically and mechanically equivalent across all critical parameters including frequency, output type, supply voltage, function, package dimensions, and operating temperature range.

The primary distinction is frequency stability specification (±25ppm vs ±50ppm) and packaging format (Bulk vs Tape & Reel). Selection between these parts depends on application-specific frequency accuracy requirements and procurement/assembly process compatibility with the packaging format.

Frequently Asked Questions (FAQ)

Q: Can ASE-44.000MHZ-L-C-T replace ASE-44.000MHZ-LR-T in all applications?

A: Substitution is valid when the application does not require the tighter ±25ppm frequency stability of the main part. The substitute part's ±50ppm specification is suitable for applications with relaxed frequency tolerance requirements. All other electrical and mechanical parameters are identical.

Q: What is the difference between the packaging formats?

A: ASE-44.000MHZ-LR-T is supplied in Bulk packaging, while ASE-44.000MHZ-L-C-T is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes. Selection depends on your procurement and manufacturing requirements.

Q: Are the physical dimensions identical?

A: Yes. Both parts are housed in 4-SMD, No Lead packages with identical dimensions of 0.126" L x 0.098" W (3.20mm x 2.50mm) and maximum seated height of 0.047" (1.20mm). PCB layout and assembly tooling are compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS3 Compliant, REACH Unaffected, classified as EAR99, and share the same HTSUS code (8542.39.0001).

Q: What is the frequency stability difference in practical terms?

A: The main part (ASE-44.000MHZ-LR-T) maintains ±25ppm frequency tolerance, while the substitute (ASE-44.000MHZ-L-C-T) maintains ±50ppm. At 44 MHz, this represents a maximum frequency deviation of ±1.1 kHz (main part) versus ±2.2 kHz (substitute). Applications requiring tighter frequency control should use the main part specification.

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