Equivalent & Substitute Parts for 9FGL0641CKILF

Part Overview

The 9FGL0641CKILF is a PCI Express (PCIe) Clock Generator IC manufactured by Renesas Electronics Corporation. This device generates clock signals for PCIe applications with a maximum frequency of 25MHz and operates from a 3.135V to 3.465V supply voltage. The part is housed in a 24-VFQFN (4x4) surface mount package with an exposed pad.

The 9FGL0641CKILF has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this clock generator.

Substiute Parts

9FGL0641CKILF

Renesas Electronics CorporationIn Stock: 10149FGL0641CKILF Datasheet

Current PartRFQ

9FGL0641DKILF

Renesas Electronics CorporationIn Stock: 11529FGL0641DKILF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9FGL0641CKILF is determined by compatibility across the following critical parameters:

Core Compatibility Criteria:

• Manufacturer: Renesas Electronics Corporation (same manufacturer ensures design consistency and support)
• Main Purpose: PCI Express (PCIe) application compatibility
• Supply Voltage Range: 3.135V ~ 3.465V (identical operating voltage)
• Operating Temperature Range: -40°C ~ 85°C (identical thermal specifications)
• PLL Functionality: Yes (required for clock generation)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• RoHS and REACH Compliance: ROHS3 Compliant and REACH Unaffected (regulatory alignment)

Allowable Variations:

• Frequency - Max: May exceed 25MHz (higher frequency capability is backward compatible)
• Input/Output Types: May differ (Clock input may be supplemented with Crystal input; Clock output may be supplemented with HCSL or LVCMOS output formats)
• Ratio - Input:Output: May differ (1:2 may be substituted with higher ratios such as 1:6)
• Package / Case: May differ in pin count and physical dimensions (40-VFQFN vs. 24-VFQFN) provided surface mount compatibility is maintained
• Product Status: Active status is preferred over obsolete status for long-term availability

The 9FGL0641DKILF meets all core compatibility criteria and represents a direct substitute with enhanced capabilities.

Parameter Comparison

Engineering Selection Recommendations

9FGL0641DKILF as Primary Substitute:

The 9FGL0641DKILF is the manufacturer-recommended substitute for the obsolete 9FGL0641CKILF. Both devices share identical supply voltage specifications (3.135V ~ 3.465V), operating temperature range (-40°C ~ 85°C), and regulatory compliance status (ROHS3 Compliant, REACH Unaffected).

The 9FGL0641DKILF maintains active product status, ensuring continued availability and manufacturer support. The device operates at a maximum frequency of 100MHz, which exceeds the 25MHz specification of the original part, providing enhanced performance capability for PCIe clock generation applications.

The primary design consideration is the package change from 24-VFQFN (4x4) to 40-VFQFN (5x5). This requires PCB layout modification to accommodate the increased pin count and physical footprint. The substitute part supports both Clock and Crystal input types, as well as HCSL and LVCMOS output formats, offering greater flexibility compared to the original Clock input and Clock output configuration.

Both parts maintain identical moisture sensitivity levels (MSL 3, 168 Hours) and are suitable for equivalent handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the 9FGL0641DKILF directly replace the 9FGL0641CKILF without PCB modifications?

A: No. The 9FGL0641DKILF uses a 40-VFQFN (5x5) package compared to the 24-VFQFN (4x4) package of the original part. PCB layout changes are required to accommodate the different pin count and physical dimensions. However, the electrical specifications and supply voltage requirements are compatible.

Q: What is the significance of the higher maximum frequency (100MHz vs. 25MHz) in the substitute part?

A: The 9FGL0641DKILF supports a maximum frequency of 100MHz, which is higher than the 25MHz specification of the 9FGL0641CKILF. This enhanced frequency capability allows the substitute part to support higher-speed PCIe applications while remaining backward compatible with lower-frequency designs.

Q: Are the supply voltage and operating temperature ranges identical between the two parts?

A: Yes. Both the 9FGL0641CKILF and 9FGL0641DKILF operate from 3.135V to 3.465V and function across the -40°C to 85°C temperature range. No power supply or thermal management modifications are necessary.

Q: What is the difference between the input and output specifications?

A: The 9FGL0641CKILF accepts Clock input and provides Clock output. The 9FGL0641DKILF accepts both Clock and Crystal input types and provides HCSL and LVCMOS output formats. These differences allow greater design flexibility with the substitute part but require verification of signal compatibility with downstream circuitry.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the 9FGL0641CKILF and 9FGL0641DKILF are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: Why is the 9FGL0641CKILF listed as obsolete?

A: The 9FGL0641CKILF has reached end-of-life status with Renesas Electronics Corporation. The 9FGL0641DKILF represents the active replacement product line, ensuring continued manufacturer support and supply chain availability for new designs and production requirements.

Q: What is the input-to-output ratio difference, and does it affect circuit design?

A: The 9FGL0641CKILF operates at a 1:2 input-to-output ratio, while the 9FGL0641DKILF operates at a 1:6 ratio. This difference reflects the enhanced frequency multiplication capability of the substitute part. Circuit design verification is necessary to confirm compatibility with the specific clock frequency requirements of the target application.