AT-7.500MDGL-T Equivalent & Substitute Parts

Part Overview

The AT-7.500MDGL-T is a 7.5 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION in HC-49/US surface mount package. This component is classified as obsolete product status. Given the obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

AT-7.500MDGL-T

TXC CORPORATIONIn Stock: 921AT-7.500MDGL-T Datasheet

Current PartRFQ

ABLS-7.500MHZ-T

Abracon LLCIn Stock: 991ABLS-7.500MHZ-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT-7.500MDGL-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 7.5 MHz (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

• Load Capacitance: Substitutes may vary within circuit design tolerance
• ESR: Substitutes may vary within circuit design tolerance
• Frequency Tolerance: Substitutes may have different tolerance specifications
• Operating Temperature Range: Substitutes may have different temperature ranges
• RoHS Status: Substitutes must maintain environmental compliance

The ABLS-7.500MHZ-T from Abracon LLC meets the mandatory matching criteria and is therefore classified as a substitute part.

Parameter Comparison

Engineering Selection Recommendations

AT-7.500MDGL-T (Main Part):

• Product Status: Obsolete
• Availability: 853 Pcs in stock
• Compliance: RoHS Compliant, AEC-Q200 rated
• Application: Suitable for existing designs where component is already qualified

ABLS-7.500MHZ-T (Substitute Part):

• Product Status: Active
• Availability: 926 Pcs in stock
• Compliance: ROHS3 Compliant, REACH Affected
• Application: Suitable for new designs and production continuity

The ABLS-7.500MHZ-T is the identified substitute for the obsolete AT-7.500MDGL-T. Both components share identical frequency, operating mode, and package specifications. The substitute part is currently in active production status, ensuring long-term availability. Design integration requires verification of load capacitance (18pF vs 22pF) and ESR (100 Ohms vs 120 Ohms) compatibility within the specific circuit application. The operating temperature range of the substitute part (0°C ~ 70°C) is narrower than the main part (-40°C ~ 85°C), which must be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can the ABLS-7.500MHZ-T directly replace the AT-7.500MDGL-T without circuit modification?

A: Both parts share the same frequency (7.5 MHz), operating mode (Fundamental), and HC-49/US package. However, the load capacitance differs (18pF vs 22pF) and ESR differs (100 Ohms vs 120 Ohms). Circuit compatibility depends on the oscillator circuit design and its tolerance to these parameter variations. Circuit validation is required for each specific application.

Q: What is the difference in operating temperature range between these parts?

A: The AT-7.500MDGL-T operates from -40°C to 85°C, while the ABLS-7.500MHZ-T operates from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C cannot use the substitute part without alternative solutions.

Q: Are both parts RoHS compliant?

A: Yes. The AT-7.500MDGL-T is RoHS Compliant. The ABLS-7.500MHZ-T is ROHS3 Compliant, which represents a more recent RoHS standard revision and is also compliant.

Q: What is the physical size difference between these crystals?

A: Both parts use the HC-49/US package with identical length (0.449" / 11.40mm). Width differs slightly (0.189" vs 0.185" / 4.80mm vs 4.70mm) and height differs slightly (0.161" vs 0.165" / 4.10mm vs 4.20mm). These dimensional variations are within HC-49/US package tolerance and do not affect PCB footprint compatibility.

Q: Why is the AT-7.500MDGL-T marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The ABLS-7.500MHZ-T is the active substitute part available from Abracon LLC for continued component sourcing.

Q: What is the frequency tolerance difference?

A: The AT-7.500MDGL-T has ±20ppm frequency tolerance, while the ABLS-7.500MHZ-T has ±50ppm frequency tolerance. Applications with strict frequency accuracy requirements must account for this difference in tolerance specifications.