49FCT3805ASOGI Equivalent & Substitute Parts

Part Overview

The 49FCT3805ASOGI is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, designed for clock signal distribution applications. This device features a 1:5 input-to-output ratio with CMOS and LVTTL input/output compatibility, housed in a 20-SOIC package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity for new designs and production requirements.

Substiute Parts

49FCT3805ASOGI

Renesas Electronics CorporationIn Stock: 229549FCT3805ASOGI Datasheet

Current PartRFQ

49FCT3805AQGI

Renesas Electronics CorporationIn Stock: 131049FCT3805AQGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 49FCT3805ASOGI is determined by the following critical parameters that must remain constant across equivalent parts:

• Functional Specification: 1:5 fanout buffer with 2 circuits
• Signal Compatibility: CMOS and LVTTL input/output support
• Electrical Characteristics: 3V to 3.6V supply voltage range
• Temperature Range: -40°C to 85°C operating window
• Compliance: ROHS3 compliance and REACH unaffected status

The 49FCT3805AQGI maintains identical functional and electrical specifications while differing only in package form factor (20-SSOP versus 20-SOIC) and product status (Active versus Obsolete). This substitution is valid where PCB layout and assembly equipment can accommodate the smaller SSOP package footprint.

Parameter Comparison

Engineering Selection Recommendations

The 49FCT3805AQGI is the direct functional equivalent to the 49FCT3805ASOGI. Both parts share identical electrical specifications, signal compatibility, and regulatory compliance status. The primary distinction is package form factor and product lifecycle status.

Selection of the 49FCT3805AQGI is appropriate for applications where:

• PCB layout and assembly processes support 20-SSOP package handling
• The reduced package footprint (0.154" width versus 0.295") aligns with design requirements
• Active product status and ongoing manufacturer support are required for production continuity

The 49FCT3805AQGI maintains ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part specification.

Frequently Asked Questions (FAQ)

Q: Can the 49FCT3805AQGI directly replace the 49FCT3805ASOGI in existing designs?

A: Electrical and functional compatibility is complete. Physical substitution requires PCB redesign to accommodate the 20-SSOP package (0.154" width) in place of the 20-SOIC package (0.295" width). Assembly equipment must support SSOP component placement and soldering.

Q: What is the primary reason for substitution?

A: The 49FCT3805ASOGI is classified as obsolete. The 49FCT3805AQGI is the active equivalent from the same manufacturer and product series, ensuring continued availability and manufacturer support.

Q: Are there electrical performance differences between these parts?

A: No. Both parts operate within identical voltage ranges (3V to 3.6V), temperature ranges (-40°C to 85°C), and support the same input/output signal types (CMOS, LVTTL).

Q: Do both parts meet the same compliance requirements?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited).

Q: What are the package dimension implications?

A: The 49FCT3805AQGI uses a 20-SSOP package with 0.154" width, compared to the 20-SOIC package with 0.295" width of the original part. This represents a significant reduction in board space but requires compatible assembly infrastructure.