49FCT805CTSOG8 Equivalent & Substitute Parts

Part Overview

The 49FCT805CTSOG8 is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, configured as a 1:5 clock distribution device in a 20-SOIC package. This part operates with CMOS and LVTTL logic levels at 4.5V to 5.5V supply voltage across a 0°C to 70°C temperature range.

The 49FCT805CTSOG8 is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications requiring clock distribution functionality.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Part Number	49FCT805CTSOG8
Category	Clock/Timing
Product Type	Fanout Buffer (Distribution)
Input:Output Ratio	1:5
Input Logic Levels	CMOS, LVTTL
Output Logic Levels	CMOS, LVTTL
Supply Voltage	4.5V – 5.5V
Operating Temperature	0°C – 70°C
Package Type	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 49FCT805CTSOG8 is evaluated based on the following critical parameters:

Functional Type: Clock buffer or fanout buffer capability
Input:Output Ratio: Ability to distribute one input signal to multiple outputs
Logic Level Compatibility: Support for CMOS and LVTTL input and output standards
Supply Voltage Range: Operating voltage compatibility with 4.5V to 5.5V systems
Operating Temperature Range: Minimum coverage of 0°C to 70°C
Package Compatibility: Surface mount configuration suitable for PCB integration
Compliance Status: RoHS3 compliance and regulatory alignment

The identified substitute part, 8L30210NLGI8, is a Clock Buffer IC from Renesas Electronics Corporation with a 3:10 input:output ratio and active product status. While this part operates at a different voltage range (1.4V to 3.465V) and temperature range (-40°C to 85°C), it provides enhanced frequency capability (200 MHz maximum) and broader logic level support including HCSL, LVCMOS, LVDS, LVPECL, LVTTL, and Crystal inputs with LVCMOS and LVTTL outputs.

Parameter Comparison

Parameter	49FCT805CTSOG8 (Main Part)	8L30210NLGI8 (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Category	Clock/Timing	Clock/Timing
Product Type	Fanout Buffer (Distribution)	Clock Buffer
Input:Output Ratio	1:5	3:10
Input Logic Levels	CMOS, LVTTL	HCSL, LVCMOS, LVDS, LVPECL, LVTTL, Crystal
Output Logic Levels	CMOS, LVTTL	LVCMOS, LVTTL
Supply Voltage	4.5V – 5.5V	1.4V – 3.465V
Operating Temperature	0°C – 70°C	-40°C – 85°C
Frequency – Max	Not specified	200 MHz
Mounting Type	Surface Mount	Surface Mount
Package Type	20-SOIC (0.295", 7.50mm Width)	32-VFQFN Exposed Pad (5x5)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

The 8L30210NLGI8 is identified as the manufacturer-recommended substitute for the obsolete 49FCT805CTSOG8. Both parts are manufactured by Renesas Electronics Corporation and maintain ROHS3 compliance and REACH unaffected status.

Key considerations for selection:

Product Status: The 8L30210NLGI8 is active, ensuring ongoing availability and supply chain support compared to the obsolete 49FCT805CTSOG8.
Voltage Compatibility: The substitute operates at 1.4V to 3.465V, which differs from the main part's 4.5V to 5.5V range. System voltage requirements must be evaluated.
Temperature Range: The substitute provides extended temperature coverage (-40°C to 85°C) beyond the main part's 0°C to 70°C range.
Package Transition: Migration from 20-SOIC to 32-VFQFN requires PCB layout redesign and footprint modification.
Logic Level Support: The substitute offers expanded input compatibility (HCSL, LVCMOS, LVDS, LVPECL, LVTTL, Crystal) while maintaining LVTTL output compatibility.
Frequency Capability: The 200 MHz maximum frequency of the substitute supports higher-speed clock distribution applications.

Frequently Asked Questions (FAQ)

Q: Can the 8L30210NLGI8 directly replace the 49FCT805CTSOG8 without design changes?

A: Direct replacement is not possible due to differences in supply voltage range, package type, and pin configuration. The substitute requires system voltage compatibility verification, PCB layout redesign for the 32-VFQFN package, and schematic modifications to accommodate the different pin assignments.

Q: What is the primary reason for substitution?

A: The 49FCT805CTSOG8 is classified as obsolete. The 8L30210NLGI8 is the manufacturer-recommended active substitute to ensure continued product availability and supply chain reliability.

Q: Are both parts RoHS compliant?

A: Yes, both the 49FCT805CTSOG8 and 8L30210NLGI8 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: How do the input:output ratios differ?

A: The main part provides a 1:5 ratio (one input to five outputs), while the substitute provides a 3:10 ratio (three inputs to ten outputs). Application requirements determine whether the increased output count is beneficial or requires design accommodation.

Q: What are the package differences?

A: The 49FCT805CTSOG8 uses a 20-SOIC package (0.295" width, 7.50mm), while the 8L30210NLGI8 uses a 32-VFQFN package (5x5mm with exposed pad). These are incompatible footprints requiring PCB redesign.

Q: Does the substitute support the same logic levels?

A: Both parts support LVTTL input and output. The substitute additionally supports HCSL, LVCMOS, LVDS, and LVPECL inputs, and LVCMOS outputs, providing greater flexibility for mixed-signal applications.

Q: What is the moisture sensitivity difference?

A: The main part has MSL 1 (unlimited moisture sensitivity level), while the substitute has MSL 3 (168 hours). The substitute requires controlled storage and handling conditions to prevent moisture absorption.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message