LFXTAL055283 Equivalent & Substitute Parts Reference

Part Overview

The LFXTAL055283 is a 16 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products in the CFPX-104 series. This surface mount device operates at 16.0000 MHz with ±10ppm frequency stability and 10pF load capacitance, housed in a 4-SMD no-lead package measuring 5.00mm × 3.20mm. The part is ROHS3 compliant and currently active in production with 844 units in stock.

Substitute parts are identified when equivalent electrical performance can be maintained across critical parameters including frequency, frequency stability, load capacitance, operating temperature range, and package form factor. Alternative sources provide design flexibility, supply chain redundancy, and inventory optimization for applications requiring 16 MHz crystal oscillators with matching electrical specifications.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Frequency	16.0000	MHz	Critical - Must match exactly
Frequency Stability	±10	ppm	Critical - Determines timing accuracy
Frequency Tolerance	±10	ppm	Critical - Initial accuracy specification
Load Capacitance	10	pF	Critical - Circuit tuning parameter
ESR (Equivalent Series Resistance)	50	Ohms	Important - Affects oscillator startup and stability
Operating Mode	Fundamental	-	Critical - Determines frequency generation method
Operating Temperature Range	-10°C to 60°C	-	Critical - Application environment compatibility
Mounting Type	Surface Mount	-	Critical - PCB assembly compatibility
Package / Case	4-SMD, No Lead	-	Critical - Physical footprint and soldering
Size / Dimension	5.00 × 3.20	mm	Important - PCB layout constraint
Height - Seated (Max)	1.00	mm	Important - Clearance and assembly compatibility
RoHS Status	ROHS3 Compliant	-	Important - Regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the LFXTAL055283 are identified based on strict electrical and mechanical parameter matching. The substitution logic is organized into two categories:

Category 1: Direct Electrical Equivalents (Load Capacitance 10pF)

The ABM8-16.000MHZ-10-1-U-T maintains identical electrical specifications: 16 MHz frequency, ±10ppm stability, 10pF load capacitance, and -10°C to 60°C operating temperature. This part is functionally interchangeable from an electrical standpoint. The ESR differs (70 Ohms versus 50 Ohms), which represents a measurable but acceptable variance within fundamental mode crystal oscillator design tolerances. The physical package remains 4-SMD no-lead configuration, though dimensions are smaller (3.20mm × 2.50mm versus 5.00mm × 3.20mm) and seated height is reduced (0.80mm versus 1.00mm). Both parts are ROHS3 compliant and active in production.

Category 2: Load Capacitance Variant (7pF Load Capacitance)

The ABM8-16.000MHZ-7-1-U-T shares the same frequency (16 MHz), frequency stability (±10ppm), operating mode (fundamental), temperature range (-10°C to 60°C), and package type (4-SMD no-lead). However, the load capacitance is specified at 7pF rather than 10pF. This parameter difference requires circuit-level evaluation, as load capacitance directly affects oscillator tuning and frequency accuracy in the application circuit. This part is suitable only when the application circuit is designed or verified to operate with 7pF load capacitance specifications.

Key Parameters Determining Substitution Eligibility:

Frequency: 16.0000 MHz (exact match required)
Frequency Stability: ±10ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature: -10°C to 60°C (exact match required)
Package Type: 4-SMD, No Lead (exact match required)
Load Capacitance: 10pF (exact match for Category 1; 7pF variant for Category 2)
RoHS Compliance: ROHS3 (maintained across all parts)

Parameter Comparison

Parameter	LFXTAL055283 (Main Part)	ABM8-16.000MHZ-10-1-U-T (Substitute 1)	ABM8-16.000MHZ-7-1-U-T (Substitute 2)
Manufacturer	IQD Frequency Products	Abracon LLC	Abracon LLC
Series	CFPX-104	ABM8	ABM8
Frequency	16.0000 MHz	16.0000 MHz	16.0000 MHz
Frequency Stability	±10ppm	±10ppm	±10ppm
Frequency Tolerance	±10ppm	±10ppm	±10ppm
Load Capacitance	10pF	10pF	7pF
ESR	50 Ohms	70 Ohms	70 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	5.00 × 3.20 mm	3.20 × 2.50 mm	3.20 × 2.50 mm
Height - Seated (Max)	1.00 mm	0.80 mm	0.80 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active
Inventory Availability	844 Pcs	114244 Pcs	1900 Pcs

Engineering Selection Recommendations

ABM8-16.000MHZ-10-1-U-T Selection Criteria:

This substitute part is electrically equivalent to the LFXTAL055283 across all critical frequency and stability parameters. Both parts maintain 16 MHz operation with ±10ppm stability and 10pF load capacitance. The ESR difference (70 Ohms versus 50 Ohms) falls within acceptable design margins for fundamental mode crystal oscillators. The ABM8 series is ROHS3 compliant and maintains active production status. Physical dimensions are smaller (3.20mm × 2.50mm versus 5.00mm × 3.20mm), which may provide PCB layout advantages in space-constrained applications. The seated height reduction (0.80mm versus 1.00mm) improves clearance margins. Inventory availability is significantly higher (114244 units), supporting supply chain continuity. This part is suitable for direct substitution when PCB layout accommodates the smaller footprint.

ABM8-16.000MHZ-7-1-U-T Selection Criteria:

This part shares identical frequency, stability, operating mode, temperature range, and package type specifications with the main part. The load capacitance specification of 7pF differs from the 10pF requirement. This variance requires verification that the application circuit is designed to operate with 7pF load capacitance. The part is ROHS3 compliant and maintains active production status. ESR is specified at 70 Ohms. Physical dimensions and seated height match the ABM8-16.000MHZ-10-1-U-T variant. This part is suitable only when circuit-level load capacitance requirements are confirmed to be compatible with 7pF specifications.

Compliance and Regulatory Status:

All three parts maintain ROHS3 compliance and active production status. No regulatory barriers exist to substitution. ECCN classification (EAR99) and HTSUS codes (8541.60.0050) are identical across all parts, confirming equivalent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can the ABM8-16.000MHZ-10-1-U-T be used as a direct replacement for the LFXTAL055283?

A: Yes, the ABM8-16.000MHZ-10-1-U-T is electrically equivalent across all critical parameters: 16 MHz frequency, ±10ppm stability, 10pF load capacitance, and -10°C to 60°C operating temperature. Both parts are 4-SMD no-lead surface mount devices with ROHS3 compliance. The ESR difference (70 Ohms versus 50 Ohms) is within acceptable design tolerances. Physical dimensions are smaller, which may require PCB layout verification.

Q: What is the significance of the load capacitance parameter in crystal oscillator substitution?

A: Load capacitance directly affects the oscillator circuit tuning and frequency accuracy. The LFXTAL055283 specifies 10pF load capacitance, which must match the application circuit design. The ABM8-16.000MHZ-7-1-U-T variant with 7pF load capacitance is not interchangeable unless the application circuit is specifically designed or verified to operate with 7pF specifications. Mismatched load capacitance will result in frequency deviation and potential circuit instability.

Q: How does ESR (Equivalent Series Resistance) affect crystal oscillator performance?

A: ESR influences oscillator startup behavior, frequency stability, and power consumption. The LFXTAL055283 specifies 50 Ohms ESR, while the ABM8 substitutes specify 70 Ohms. This 20-Ohm difference is measurable but typically acceptable within fundamental mode crystal oscillator design margins. However, applications with tight frequency stability requirements or marginal oscillator circuit design should evaluate ESR impact through circuit simulation or prototype testing.

Q: Are the physical dimension differences between the LFXTAL055283 and ABM8 series significant?

A: The LFXTAL055283 measures 5.00mm × 3.20mm with 1.00mm seated height. The ABM8 substitutes measure 3.20mm × 2.50mm with 0.80mm seated height. The smaller ABM8 footprint may provide PCB layout advantages in space-constrained designs. However, PCB artwork and component placement must be verified to accommodate the different dimensions. The reduced seated height improves clearance margins for overlying components or enclosures.

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

A: Frequency tolerance specifies the initial accuracy of the crystal oscillator at the time of manufacture, typically measured at 25°C. Frequency stability specifies the maximum frequency deviation over the operating temperature range (-10°C to 60°C for these parts). Both parameters are specified at ±10ppm for the LFXTAL055283 and its substitutes, indicating equivalent performance across manufacturing and operational conditions.

Q: Can the ABM8-16.000MHZ-7-1-U-T be used if the application circuit is designed for 10pF load capacitance?

A: No. The ABM8-16.000MHZ-7-1-U-T is specified for 7pF load capacitance and is not interchangeable with the 10pF LFXTAL055283 in circuits designed for 10pF load capacitance. Using a 7pF crystal in a 10pF circuit will result in frequency deviation and potential oscillator instability. This part is suitable only when the application circuit is verified to operate with 7pF load capacitance specifications.

Q: What inventory considerations apply to these substitute parts?

A: The LFXTAL055283 has 844 units in stock. The ABM8-16.000MHZ-10-1-U-T has significantly higher availability (114244 units), supporting supply chain continuity and reducing lead time risk. The ABM8-16.000MHZ-7-1-U-T has 1900 units available. For applications requiring long-term supply assurance, the ABM8-16.000MHZ-10-1-U-T provides superior inventory depth.

Q: Are all three parts suitable for RoHS-compliant applications?

A: Yes. The LFXTAL055283, ABM8-16.000MHZ-10-1-U-T, and ABM8-16.000MHZ-7-1-U-T are all ROHS3 compliant. No regulatory barriers exist to substitution in RoHS-regulated applications. REACH status is identical (REACH Unaffected) across all parts.

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