PI49FCT3805ASE Equivalent & Substitute Parts

Part Overview

The PI49FCT3805ASE is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:5 clock distribution at frequencies up to 66 MHz. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The 49FCT3805 series provides CMOS/TTL-compatible clock buffering in a 20-SOIC surface mount package, making it suitable for timing distribution applications requiring multiple output channels from a single input source.

Substiute Parts

PI49FCT3805ASE

Diodes IncorporatedIn Stock: 1084PI49FCT3805ASE Datasheet

Current PartRFQ

49FCT3805SOG

Renesas Electronics CorporationIn Stock: 114649FCT3805SOG Datasheet

MFR RecommendedRFQ

49FCT3805SOG8

Renesas Electronics CorporationIn Stock: 84649FCT3805SOG8 Datasheet

MFR RecommendedRFQ

49FCT3805SOGI

Renesas Electronics CorporationIn Stock: 126249FCT3805SOGI Datasheet

MFR RecommendedRFQ

49FCT3805SOGI8

Renesas Electronics CorporationIn Stock: 75849FCT3805SOGI8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI49FCT3805ASE is determined by strict equivalence across the following parameters:

• Base Product Number: 49FCT3805 (all substitutes share this designation)
• Package / Case: 20-SOIC (0.295", 7.50mm Width) (identical across all parts)
• Ratio - Input:Output: 1:5 (functional requirement)
• Voltage - Supply: 3V ~ 3.6V (electrical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• Input/Output Logic Levels: CMOS/TTL compatibility (signal integrity)

The substitute parts listed are manufactured by Renesas Electronics Corporation and maintain the same electrical and mechanical specifications as the original part. Substitutes are differentiated by packaging format (Tube vs. Tape & Reel) and operating temperature range. Parts designated with "I" suffix support the extended temperature range (-40°C ~ 85°C) matching the original specification, while non-"I" variants operate within 0°C ~ 70°C.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes for Extended Temperature Range Applications:

The 49FCT3805SOGI and 49FCT3805SOGI8 are direct functional equivalents to the PI49FCT3805ASE, maintaining the -40°C ~ 85°C operating temperature range. Both parts are manufactured by Renesas Electronics Corporation and hold active product status. Selection between these two depends on procurement packaging requirements: 49FCT3805SOGI is supplied in Tube format, while 49FCT3805SOGI8 is supplied in Tape & Reel format for automated assembly.

Alternative Substitutes for Standard Temperature Range Applications:

The 49FCT3805SOG and 49FCT3805SOG8 are functionally equivalent but operate within a narrower temperature range (0°C ~ 70°C). These parts are suitable for applications where the extended low-temperature specification is not required. Packaging differentiation follows the same pattern: Tube versus Tape & Reel.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical electrical supply voltage specifications (3V ~ 3.6V). The transition from Diodes Incorporated to Renesas Electronics Corporation manufacturing does not introduce compliance or regulatory concerns.

Frequently Asked Questions (FAQ)

Q: Can 49FCT3805SOG be used in place of PI49FCT3805ASE in all applications?

A: The 49FCT3805SOG is functionally equivalent in terms of clock distribution capability (1:5 ratio, 20-SOIC package, 3V ~ 3.6V supply). However, it operates within 0°C ~ 70°C, whereas the original part specifies -40°C ~ 85°C. Use this substitute only if your application does not require extended low-temperature operation below 0°C or high-temperature operation above 70°C.

Q: What is the difference between 49FCT3805SOG8 and 49FCT3805SOGI8?

A: Both parts are manufactured by Renesas Electronics and supplied in Tape & Reel packaging. The primary difference is operating temperature range: 49FCT3805SOG8 operates 0°C ~ 70°C, while 49FCT3805SOGI8 operates -40°C ~ 85°C. The "I" designation indicates extended temperature range support. Select 49FCT3805SOGI8 for applications requiring the full -40°C ~ 85°C specification.

Q: Are Tube and Tape & Reel versions electrically identical?

A: Yes. The Tube (49FCT3805SOG, 49FCT3805SOGI) and Tape & Reel (49FCT3805SOG8, 49FCT3805SOGI8) versions are electrically identical. The packaging format difference affects only procurement and assembly handling. Tape & Reel format is optimized for high-volume automated assembly, while Tube format is suitable for lower-volume or manual assembly operations.

Q: Is the PI49FCT3805ASE still available for procurement?

A: The PI49FCT3805ASE is classified as obsolete. Active substitutes from Renesas Electronics (49FCT3805SOG, 49FCT3805SOG8, 49FCT3805SOGI, 49FCT3805SOGI8) are currently in production and available for new designs and ongoing procurement.

Q: Do the Renesas substitutes support the same input/output logic levels?

A: The original PI49FCT3805ASE specifies CMOS/TTL input and CMOS output. Renesas substitutes specify CMOS/LVTTL input and CMOS/LVTTL output. LVTTL (Low Voltage TTL) is a subset of TTL specifications and maintains backward compatibility with TTL-level signals. The substitutes provide equivalent or enhanced logic level support.