49FCT805ASOGI8 Equivalent & Substitute Parts

Part Overview

The 49FCT805ASOGI8 is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, designed for 1:5 clock distribution in 20-SOIC surface mount packaging. This part operates with CMOS and LVTTL input/output compatibility and a supply voltage range of 4.75V to 5.25V. The product is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

49FCT805ASOGI8

Renesas Electronics CorporationIn Stock: 105049FCT805ASOGI8 Datasheet

Current PartRFQ

8L30210NLGI8

Renesas Electronics CorporationIn Stock: 9438L30210NLGI8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 49FCT805ASOGI8 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Clock distribution and fanout buffer functionality
• Input signal type acceptance (CMOS, LVTTL, or compatible logic families)
• Output signal type delivery (CMOS, LVTTL, or compatible logic families)
• Operating temperature range (-40°C ~ 85°C minimum)
• RoHS3 compliance for regulatory alignment

Electrical Compatibility Criteria:

• Supply voltage range overlap or compatibility
• Input/output logic level compatibility
• Frequency capability sufficient for application requirements

Physical Compatibility Criteria:

• Surface mount technology
• Pin count and functional pin mapping
• PCB footprint accommodation

The substitute part 8L30210NLGI8 meets functional clock distribution requirements with expanded input/output logic family support and higher frequency capability, though it operates at a different voltage range and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The 49FCT805ASOGI8 is classified as Obsolete. The 8L30210NLGI8 is an Active product from the same manufacturer (Renesas Electronics Corporation) and represents a viable alternative for clock distribution applications.

Both parts maintain ROHS3 compliance and operate within the -40°C to 85°C temperature range. The substitute part offers expanded input signal compatibility (HCSL, LVCMOS, LVDS, LVPECL, LVTTL, Crystal) and specified maximum frequency of 200 MHz, providing enhanced flexibility for modern clock distribution requirements.

Critical design considerations for substitution:

• Supply voltage range differs significantly (4.75V–5.25V versus 1.4V–3.465V); power supply architecture must be evaluated
• Package footprint changes from 20-SOIC to 32-VFQFN; PCB layout redesign is required
• Input/output ratio changes from 1:5 to 3:10; functional pin mapping must be verified against application requirements
• Moisture sensitivity level increases from MSL 1 to MSL 3; storage and handling procedures may require adjustment

Frequently Asked Questions (FAQ)

Q: Can the 8L30210NLGI8 directly replace the 49FCT805ASOGI8 without PCB modification?

A: No. The package changes from 20-SOIC to 32-VFQFN, requiring PCB layout redesign. Additionally, the input/output ratio differs (1:5 versus 3:10), necessitating functional verification of pin assignments and signal routing.

Q: What is the primary reason for seeking a substitute for the 49FCT805ASOGI8?

A: The 49FCT805ASOGI8 is classified as Obsolete. The 8L30210NLGI8 is an Active product offering equivalent clock distribution functionality with enhanced specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the 49FCT805ASOGI8 and 8L30210NLGI8 are ROHS3 compliant.

Q: What is the impact of the voltage supply range difference?

A: The 49FCT805ASOGI8 operates at 4.75V–5.25V (5V logic), while the 8L30210NLGI8 operates at 1.4V–3.465V (low-voltage logic). System power supply architecture must be evaluated to determine compatibility with the substitute part's voltage requirements.

Q: How does the moisture sensitivity level affect component handling?

A: The 49FCT805ASOGI8 has MSL 1 (Unlimited), allowing indefinite shelf life without moisture control. The 8L30210NLGI8 has MSL 3 (168 Hours), requiring controlled storage conditions and bake-out procedures before soldering if moisture absorption limits are exceeded.

Q: What input signal types does each part accept?

A: The 49FCT805ASOGI8 accepts CMOS and LVTTL inputs. The 8L30210NLGI8 accepts HCSL, LVCMOS, LVDS, LVPECL, LVTTL, and Crystal inputs, providing broader signal source compatibility.