49FCT805BTSOG Equivalent & Substitute Parts

Part Overview

The 49FCT805BTSOG 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 component features CMOS and LVTTL input/output compatibility with a 4.5V to 5.5V supply voltage range and operates across 0°C to 70°C.

The 49FCT805BTSOG 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.

Substiute Parts

49FCT805BTSOG

Renesas Electronics CorporationIn Stock: 118949FCT805BTSOG Datasheet

Current PartRFQ

8L30210NLGI

Renesas Electronics CorporationIn Stock: 9638L30210NLGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 49FCT805BTSOG requires evaluation based on the following critical parameters:

Functional Parameters:

• Clock distribution capability (fanout buffer or clock buffer functionality)
• Input/Output ratio compatibility or functional equivalence
• Input and output logic family support (CMOS, LVTTL, LVCMOS)

Electrical Parameters:

• Supply voltage range compatibility or overlap
• Operating temperature range coverage
• Maximum frequency capability (where applicable)

Physical Parameters:

• Surface mount packaging
• Pin count and footprint considerations
• Moisture sensitivity level and handling requirements

Compliance Parameters:

• RoHS3 compliance status
• REACH compliance status
• Active product status for long-term availability

The substitute part 8L30210NLGI is a Clock Buffer IC from Renesas Electronics Corporation with active product status. While it operates at a different input:output ratio (3:10 versus 1:5) and features enhanced frequency capability (200 MHz maximum), it provides clock distribution functionality with overlapping logic family support (LVCMOS, LVTTL) and RoHS3 compliance. The substitute operates at a lower supply voltage range (1.4V ~ 3.465V) and an extended operating temperature range (-40°C ~ 85°C), requiring design-level evaluation for voltage compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 8L30210NLGI is an active product from Renesas Electronics Corporation with RoHS3 compliance, providing long-term supply chain stability compared to the obsolete 49FCT805BTSOG. Both components maintain ROHS3 and REACH compliance status.

Selection of the 8L30210NLGI requires verification of the following design-level factors:

• Supply voltage compatibility: The substitute operates at 1.4V ~ 3.465V, which does not overlap with the original part's 4.5V ~ 5.5V range. Voltage regulation or level shifting may be required.
• Input:Output ratio: The substitute provides 3:10 distribution versus the original 1:5 ratio. Application requirements must accommodate this functional difference.
• Package footprint: The substitute uses 32-VFQFN Exposed Pad packaging versus the original 20-SOIC, requiring PCB layout redesign.
• Operating temperature: The substitute supports -40°C ~ 85°C, extending the lower temperature limit and upper temperature capability beyond the original specification.
• Moisture sensitivity: The substitute has MSL 3 (168 Hours) versus MSL 1 (Unlimited), requiring stricter handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the 8L30210NLGI directly replace the 49FCT805BTSOG without design modifications?

A: No. The substitute differs in supply voltage range, input:output ratio, package type, and physical footprint. Design-level evaluation and potential circuit modifications are required.

Q: What is the primary reason for substitution?

A: The 49FCT805BTSOG is obsolete. The 8L30210NLGI is an active product from the same manufacturer, ensuring continued availability and support.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the 49FCT805BTSOG and 8L30210NLGI are RoHS3 compliant and REACH unaffected.

Q: What is the key electrical difference between these parts?

A: The main part operates at 4.5V ~ 5.5V supply voltage, while the substitute operates at 1.4V ~ 3.465V. These ranges do not overlap, requiring voltage compatibility assessment.

Q: How do the input:output ratios differ?

A: The 49FCT805BTSOG provides 1:5 clock distribution (one input to five outputs). The 8L30210NLGI provides 3:10 distribution (three inputs to ten outputs), requiring application-level evaluation.

Q: What packaging changes are involved?

A: The original part uses 20-SOIC (0.295", 7.50mm Width) surface mount packaging. The substitute uses 32-VFQFN Exposed Pad (5x5) surface mount packaging, requiring PCB redesign.

Q: Does the substitute support the same logic families?

A: Both support LVCMOS and LVTTL output logic. The substitute additionally supports HCSL, LVDS, LVPECL input logic and crystal input, providing broader input compatibility.

Q: What is the moisture sensitivity difference?

A: The original part has MSL 1 (Unlimited moisture exposure allowed). The substitute has MSL 3 (168 Hours maximum exposure), requiring stricter handling, storage, and assembly protocols.

Q: What is the operating temperature range difference?

A: The original part operates 0°C ~ 70°C. The substitute operates -40°C ~ 85°C, providing extended low-temperature and high-temperature capability.