ASFL1-40.000MHZ-EC-T Equivalent & Substitute Parts

Part Overview

The ASFL1-40.000MHZ-EC-T is a 40 MHz XO (Standard) crystal oscillator manufactured by Abracon LLC. This surface mount oscillator operates at 3.3V with HCMOS and TTL output, featuring enable/disable functionality in a 4-SMD, No Lead package. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the allowed parameter tolerances for this oscillator category.

Substiute Parts

ASFL1-40.000MHZ-EC-T

Abracon LLCIn Stock: 1127ASFL1-40.000MHZ-EC-T Datasheet

Current PartRFQ

ASFL1-40.000MHZ-EK-T

Abracon LLCIn Stock: 1486ASFL1-40.000MHZ-EK-T Datasheet

UpgradeRFQ

ASFL1-40.000MHZ-L-T

Abracon LLCIn Stock: 2969ASFL1-40.000MHZ-L-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ASFL1-40.000MHZ-EC-T are qualified based on the following criteria:

Critical Parameters (Must Match):

• Frequency: 40 MHz
• Output Type: HCMOS, TTL
• Supply Voltage: 3.3V
• Function: Enable/Disable
• Package / Case: 4-SMD, No Lead
• Physical Dimensions: 0.197" L x 0.126" W (5.00mm x 3.20mm)
• Height - Seated (Max): 0.051" (1.30mm)
• Mounting Type: Surface Mount

Allowed Variation Parameters:

• Frequency Stability: ±50ppm (baseline) to ±100ppm (relaxed tolerance)
• Operating Temperature Range: -20°C ~ 70°C (baseline) to -40°C ~ 85°C (extended range)
• Current - Supply (Max): 45mA (fixed across all variants)
• Current - Supply (Disable) (Max): 10µA (fixed across all variants)

Two substitute parts are identified: ASFL1-40.000MHZ-EK-T (upgrade variant with improved frequency stability) and ASFL1-40.000MHZ-L-T (manufacturer recommended variant with extended temperature range).

Parameter Comparison

Engineering Selection Recommendations

ASFL1-40.000MHZ-EK-T (Upgrade Variant): This substitute offers improved frequency stability at ±30ppm compared to the main part's ±50ppm. Both parts maintain identical operating temperature range (-20°C ~ 70°C), supply voltage (3.3V), and physical dimensions. Selection of this variant is appropriate when tighter frequency tolerance is required within the same thermal operating window. All compliance certifications (ROHS3, REACH Unaffected, EAR99) are maintained.

ASFL1-40.000MHZ-L-T (Manufacturer Recommended Variant): This substitute extends the operating temperature range to -40°C ~ 85°C, compared to the main part's -20°C ~ 70°C. Frequency stability is relaxed to ±100ppm. Selection of this variant is appropriate for applications requiring extended temperature operation. All compliance certifications (ROHS3, REACH Unaffected, EAR99) are maintained. This part is designated as manufacturer recommended status.

Both substitutes maintain identical electrical performance in terms of supply voltage, output type (HCMOS, TTL), enable/disable function, and current specifications. Physical footprint and package type are identical across all three variants, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can ASFL1-40.000MHZ-EK-T be used as a direct replacement for ASFL1-40.000MHZ-EC-T?

A: Yes. Both parts share identical frequency (40 MHz), output type (HCMOS, TTL), supply voltage (3.3V), enable/disable function, package type (4-SMD, No Lead), and physical dimensions (5.00mm x 3.20mm x 1.30mm max height). The EK-T variant provides improved frequency stability (±30ppm vs ±50ppm) within the same operating temperature range (-20°C ~ 70°C).

Q: Can ASFL1-40.000MHZ-L-T be used as a direct replacement for ASFL1-40.000MHZ-EC-T?

A: Yes. Both parts share identical frequency (40 MHz), output type (HCMOS, TTL), supply voltage (3.3V), enable/disable function, package type (4-SMD, No Lead), and physical dimensions (5.00mm x 3.20mm x 1.30mm max height). The L-T variant extends the operating temperature range to -40°C ~ 85°C but operates at relaxed frequency stability (±100ppm vs ±50ppm).

Q: What is the difference between packaging options listed for the substitute parts?

A: The main part ASFL1-40.000MHZ-EC-T is supplied in Tape & Reel (TR) packaging. Substitute ASFL1-40.000MHZ-EK-T is available in Cut Tape (CT) & Digi-Reel® packaging. Substitute ASFL1-40.000MHZ-L-T is available in Cut Tape (CT) & Digi-Reel® packaging. These packaging differences do not affect component electrical or mechanical specifications; they relate only to order quantity and delivery format.

Q: Are all three variants ROHS3 compliant?

A: Yes. ASFL1-40.000MHZ-EC-T, ASFL1-40.000MHZ-EK-T, and ASFL1-40.000MHZ-L-T are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All three variants are REACH Unaffected and classified as EAR99.

Q: Which substitute should be selected for applications requiring extended temperature operation?

A: ASFL1-40.000MHZ-L-T is the appropriate selection for applications requiring extended temperature operation. This variant operates from -40°C to 85°C, compared to the standard range of -20°C to 70°C. This part is designated as manufacturer recommended.

Q: Which substitute should be selected for applications requiring tighter frequency tolerance?

A: ASFL1-40.000MHZ-EK-T is the appropriate selection for applications requiring tighter frequency tolerance. This variant provides ±30ppm frequency stability compared to the main part's ±50ppm, while maintaining the standard operating temperature range of -20°C to 70°C.