Equivalent & Substitute Parts: 841654ALMILF

Part Overview

The Renesas Electronics Corporation 841654ALMILF is a Clock Generator, Fanout Distribution, Multiplexer IC operating at a maximum frequency of 125MHz in a 28-TSSOP surface mount package. This device features integrated PLL with bypass capability, supporting multiple input types (LVCMOS, LVTTL, Crystal) and output formats (HCSL, LVCMOS, LVTTL). The part is classified as obsolete, necessitating identification of active alternative components that maintain functional compatibility within system designs.

Substiute Parts

841654ALMILF

Renesas Electronics CorporationIn Stock: 862841654ALMILF Datasheet

Current PartRFQ

9FGV1004C001NBGI

Renesas Electronics CorporationIn Stock: 10569FGV1004C001NBGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 841654ALMILF is based on functional equivalence within the Clock Generator IC category. The primary substitute, Renesas Electronics Corporation 9FGV1004C001NBGI, qualifies as a direct alternative based on the following criteria:

Functional Compatibility Parameters:

• Clock Generator classification with integrated PLL functionality
• Single circuit configuration matching the original design
• Operating temperature range alignment (-40°C ~ 85°C)
• Surface mount technology compatibility
• Input/Output signal type overlap (LVCMOS, LVTTL, HCSL support)
• Supply voltage range inclusion (3.135V ~ 3.465V supported)

Substitution Rationale: The 9FGV1004C001NBGI maintains core clock generation and distribution functionality while offering enhanced specifications. The substitute device supports higher maximum frequency (325MHz versus 125MHz), expanded input/output format options, and multiple supply voltage ranges. The substitute operates within the same temperature specification and employs surface mount packaging suitable for direct board-level replacement in most applications.

Parameter Comparison

Engineering Selection Recommendations

The 9FGV1004C001NBGI is the manufacturer-recommended substitute for the obsolete 841654ALMILF. Selection of this alternative is supported by the following engineering factors:

Product Status and Availability: The substitute device maintains active product status with confirmed inventory availability (965 pieces in stock), ensuring long-term supply chain continuity compared to the obsolete main part.

Compliance and Environmental Standards: The 9FGV1004C001NBGI carries ROHS3 compliance certification and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution. Moisture sensitivity level classification of 1 (Unlimited) indicates minimal handling restrictions during assembly and storage.

Functional Equivalence: Both devices operate within the identical temperature range (-40°C ~ 85°C) and share the 3.135V ~ 3.465V supply voltage specification. The substitute maintains support for LVCMOS, LVTTL, and HCSL signal types present in the original design, ensuring signal compatibility at system interfaces.

Performance Enhancement: The substitute device provides increased maximum frequency capability (325MHz) and expanded input/output format support without compromising compatibility with existing 3.3V supply rail designs. The enhanced feature set accommodates future system upgrades while maintaining backward compatibility with legacy signal specifications.

Package Consideration: The substitute employs a 24-WFQFN package versus the original 28-TSSOP package. This represents a reduction in pin count and physical footprint, requiring PCB layout modification for direct substitution. Pin-to-pin functional mapping must be verified during design integration.

Frequently Asked Questions (FAQ)

Q: Can the 9FGV1004C001NBGI directly replace the 841654ALMILF without PCB modification?

A: Direct pin-for-pin replacement is not possible due to package differences (28-TSSOP versus 24-WFQFN). PCB layout redesign is required to accommodate the different package footprint and pin configuration. Functional signal mapping between the two devices must be completed during design integration.

Q: What are the key functional differences between these clock generator ICs?

A: Both devices provide clock generation with integrated PLL functionality and operate within the same temperature range. The substitute offers higher maximum frequency (325MHz versus 125MHz), additional input/output format options (LVDS, CML, LVPECL), and support for multiple supply voltage ranges (1.71V to 3.465V versus 3.135V to 3.465V only).

Q: Is the 9FGV1004C001NBGI compatible with 3.3V supply designs using the 841654ALMILF?

A: Yes. The substitute device supports the 3.135V ~ 3.465V supply voltage range, maintaining compatibility with existing 3.3V power distribution networks. No supply rail modifications are required for voltage compatibility.

Q: What input and output signal types are supported by the substitute device?

A: The 9FGV1004C001NBGI accepts HCSL, LVCMOS, LVDS, and Crystal inputs. Output formats include CML, HCSL, LP-HCSL, LVCMOS, LVDS, and LVPECL. The original device input types (LVCMOS, LVTTL, Crystal) and output types (HCSL, LVCMOS, LVTTL) are all supported by the substitute.

Q: Does the substitute device require different handling procedures during assembly?

A: The substitute device carries Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or assembly. This represents equivalent or improved handling characteristics compared to the original part.

Q: What is the inventory status of the substitute part?

A: The 9FGV1004C001NBGI maintains active product status with 965 pieces currently in stock, providing reliable supply availability for production and design implementation.

Q: Are there regulatory compliance differences between the main part and substitute?

A: The substitute device carries ROHS3 compliance and REACH unaffected certification. The original part status for these certifications is not specified. Current design standards require ROHS3 compliance, making the substitute suitable for applications with regulatory compliance requirements.