9FGL0651BKILF PCI Express Clock Generator - Equivalent & Substitute Parts

Part Overview

The 9FGL0651BKILF is a PCI Express (PCIe) Clock/Frequency Generator IC manufactured by Renesas Electronics Corporation. This surface-mount device operates at 100MHz with a single output and is housed in a 40-VFQFN (5x5) package. The product is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

Substiute Parts

9FGL0651BKILF

Renesas Electronics CorporationIn Stock: 7949FGL0651BKILF Datasheet

Current PartRFQ

9FGL0651CKILF

Renesas Electronics CorporationIn Stock: 14429FGL0651CKILF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9FGL0651BKILF is determined by strict alignment of the following critical parameters:

Mandatory Compatibility Parameters:

• Package / Case: 40-VFQFN Exposed Pad (physical and electrical compatibility)
• Voltage - Supply: 3.135V ~ 3.465V (power supply compatibility)
• Operating Temperature: -40°C ~ 85°C (thermal operating range)
• Main Purpose: PCI Express (PCIe) (functional application)
• Mounting Type: Surface Mount (assembly compatibility)
• PLL: Yes (functional requirement)
• RoHS Status: ROHS3 Compliant (regulatory compliance)
• Moisture Sensitivity Level (MSL): 3 (168 Hours) (handling and storage requirements)

Variable Parameters (Allowed to Differ):

• Frequency - Max (may be lower or higher depending on system requirements)
• Input Type (Crystal or Clock input acceptable)
• Output Type (HCSL, LVCMOS, or Clock output acceptable)
• Ratio - Input:Output (may vary based on frequency requirements)
• Differential - Input:Output (configuration may differ)

The substitute part 9FGL0651CKILF meets all mandatory compatibility parameters while operating at a different maximum frequency (25MHz vs. 100MHz).

Parameter Comparison

Engineering Selection Recommendations

9FGL0651CKILF Substitution Criteria:

The 9FGL0651CKILF is a valid substitute for the 9FGL0651BKILF when the system application requires a maximum frequency of 25MHz or lower. Both devices share identical electrical supply requirements (3.135V ~ 3.465V), thermal operating range (-40°C ~ 85°C), package form factor (40-VFQFN Exposed Pad), and regulatory compliance status (ROHS3 Compliant, MSL 3).

The primary differentiator is maximum frequency capability. The 9FGL0651CKILF operates at 25MHz maximum versus the 9FGL0651BKILF at 100MHz maximum. System clock frequency requirements must be evaluated to determine substitution feasibility.

Both parts are classified as obsolete products. Inventory availability should be confirmed prior to procurement decisions. The 9FGL0651CKILF currently shows higher inventory availability (1347 Pcs) compared to the 9FGL0651BKILF (690 Pcs).

Frequently Asked Questions (FAQ)

Q: Can the 9FGL0651CKILF replace the 9FGL0651BKILF in all applications?

A: No. Substitution is valid only when the system clock frequency requirement is 25MHz or lower. The 9FGL0651CKILF cannot support applications requiring the full 100MHz output capability of the 9FGL0651BKILF.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 40-VFQFN Exposed Pad package (5x5 form factor), ensuring identical PCB footprint and mounting compatibility.

Q: What is the difference between Crystal and Clock input types?

A: The 9FGL0651BKILF accepts a Crystal input, while the 9FGL0651CKILF accepts a Clock input. Both input types are acceptable for PCIe clock generation applications; however, the input signal source must match the specified input type for each device.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the 9FGL0651BKILF and 9FGL0651CKILF are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99 with identical HTSUS code 8542.39.0001.

Q: What does Moisture Sensitivity Level (MSL) 3 mean for handling?

A: MSL 3 indicates a maximum floor life of 168 hours (7 days) after the package is opened and exposed to ambient conditions. Components must be stored in moisture-controlled environments and used within this timeframe to prevent moisture absorption that could affect solderability and reliability.

Q: Are there any differences in supply voltage requirements?

A: No. Both parts operate within the identical supply voltage range of 3.135V ~ 3.465V, ensuring direct compatibility with existing power distribution designs.

Q: What is the significance of the 1:7 and 1:6 input-to-output ratios?

A: These ratios indicate the frequency multiplication factor. The 9FGL0651BKILF multiplies the input frequency by 7, while the 9FGL0651CKILF multiplies by 6. These ratios are frequency-dependent and reflect the different maximum operating frequencies of each device.