553MLFT Clock Fanout Buffer IC Equivalent & Substitute Parts

Part Overview

The 553MLFT is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, designed for clock distribution applications requiring 1:4 signal fanout at frequencies up to 200 MHz. This 8-SOIC surface mount device operates across a supply voltage range of 2.375V to 5.25V and is classified as Active product status. Substitute parts are identified when equivalent electrical performance, package compatibility, and compliance certifications align with the original specification, enabling seamless component replacement in production environments.

Substiute Parts

553MLFT

Renesas Electronics CorporationIn Stock: 3013553MLFT Datasheet

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NB3L553DG

onsemiIn Stock: 2437NB3L553DG Datasheet

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NB3L553DR2G

onsemiIn Stock: 2771NB3L553DR2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 553MLFT are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Equivalence Criteria:

• Fanout Buffer (Distribution) type with 1:4 input-to-output ratio
• Maximum frequency rating of 200 MHz or greater
• Supply voltage range encompassing 2.375V ~ 5.25V
• CMOS-compatible input and output logic levels

Mechanical & Package Compatibility:

• 8-SOIC (0.154", 3.90mm Width) package footprint
• Surface mount mounting type

Compliance & Certification:

• ROHS3 Compliant status
• Moisture Sensitivity Level (MSL) of 1 or better
• Active product status ensuring ongoing availability and support

The substitute parts NB3L553DG and NB3L553DR2G, both manufactured by onsemi, meet all electrical and mechanical requirements. Both devices maintain the 1:4 fanout ratio, 200 MHz maximum frequency, identical package geometry, and equivalent supply voltage specifications. The primary differences are packaging format (Tube versus Cut Tape & Digi-Reel®) and operating temperature range extension (-40°C ~ 85°C versus 0°C ~ 70°C), which represents an enhancement rather than a limitation.

Parameter Comparison

Engineering Selection Recommendations

Both NB3L553DG and NB3L553DR2G qualify as direct substitutes for the 553MLFT based on electrical equivalence and mechanical compatibility. Selection between these options depends on packaging and supply chain requirements:

NB3L553DG (Tube Packaging): Suitable for applications requiring standard tube packaging format. Maintains all electrical specifications and compliance certifications equivalent to the 553MLFT.

NB3L553DR2G (Cut Tape & Digi-Reel® Packaging): Appropriate for high-volume production environments utilizing automated tape-and-reel handling systems. Identical electrical performance with enhanced operating temperature range (-40°C ~ 85°C).

Both substitute parts are Active status products from onsemi, ensuring continued manufacturing support and availability. All three devices maintain ROHS3 compliance and MSL Level 1 certification, confirming environmental and reliability standards alignment.

Frequently Asked Questions (FAQ)

Q: Can NB3L553DG and NB3L553DR2G be used interchangeably with 553MLFT?

A: Yes. Both onsemi parts meet the electrical and mechanical specifications of the 553MLFT. The primary difference is packaging format (Tube versus Cut Tape & Digi-Reel®), which does not affect functional performance or PCB footprint compatibility.

Q: What is the significance of the extended operating temperature range (-40°C ~ 85°C) on the onsemi substitutes?

A: The onsemi parts support a wider operating temperature range than the original 553MLFT (0°C ~ 70°C). This represents a capability enhancement and does not create compatibility issues. Applications operating within the 0°C ~ 70°C window remain fully compatible.

Q: Are the input and output logic level differences (CMOS versus LVCMOS/LVTTL) significant?

A: LVCMOS and LVTTL are low-voltage variants of CMOS and TTL logic families. The onsemi substitutes support these additional logic standards while maintaining full CMOS compatibility, providing broader interface flexibility without compromising the original design requirements.

Q: Do all three parts share identical PCB footprints?

A: Yes. All three devices use the 8-SOIC (0.154", 3.90mm Width) package, ensuring identical PCB footprint and mounting compatibility. No layout modifications are required for substitution.

Q: Are there any compliance or certification differences between the parts?

A: No. All three parts maintain ROHS3 compliance, MSL Level 1 certification, and Active product status. Compliance and reliability standards are equivalent across all options.