Part A
9FGV0841AKILF
ルネサス エレクトロニクス アメリカ株式会社
- Lifecycle
- Active
- Stock
- 7596 個数
- Package
- VFQFN-48
- Series
- クロックタイミング - 特定用途向け
Replacement verdict
Compatible functional replacement candidate
The 9FGV0241AKLF and 9FGV0841AKILF share the same 25 MHz output frequency, 3.3 V supply voltage, and PCIe Gen1-4 compliant HCSL output type, making them functionally aligned for clock generation applications. However, the 9FGV0241AKLF provides 2 differential outputs while the 9FGV0841AKILF provides 8, and their package footprints differ, so board-level validation is required before substitution.
Output Frequency
High match
Output Type
High match
Output Channel Count
Validation required
Package Type
Validation required
Parts at a glance
Part B
9FGV0241AKLF
ルネサス エレクトロニクス アメリカ株式会社
- Lifecycle
- Active
- Stock
- 1608 個数
- Package
- VFQFN-24
- Series
- クロックタイミング - 特定用途向け
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 9FGV0241AKLF | 9FGV0841AKILF | Why it matters |
|---|---|---|---|
| Number of Outputs | 2 | 8 | Determines how many clock loads the buffer can drive; a direct functional substitutability constraint. |
| Package / Case | 24-VFQFN Exposed Pad | 48-VFQFN Exposed Pad | Footprint and pin count must match the PCB layout for a drop-in replacement. |
| Supplier Device Package | 24-QFN (4x4) | 48-QFN (6x6) | Physical body size affects board space and thermal performance. |
| Operating Temperature | 0°C to 70°C | -40°C to 85°C | Industrial temperature range is required for harsh environments; commercial parts may not be substitutable. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must be compatible with the existing manufacturing process. |
| Voltage - Supply | 1.7V ~ 1.9V | 1.7V ~ 1.9V | Supply voltage must match the system rail to avoid level-shifting or damage. |
| Output Type | HCSL | HCSL | Output signaling standard must be compatible with the downstream clock receiver. |
| Input Type | HCSL | HCSL | Input signaling must match the upstream clock source for reliable locking. |
| PLL | Yes | Yes | Presence of an internal PLL affects jitter filtering and clock generation capability. |
| Main Purpose | PCI Express (PCIe) | PCI Express (PCIe) | Target application determines whether the buffer meets the required protocol and jitter specifications. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 9FGV0841AKILF | 9FGV0241AKLF |
|---|---|---|
| Supplier | Renesas Electronics America Inc | - |
| Part Status | Active | Active |
| PLL | Yes | Yes |
| Main Purpose | PCI Express (PCIe) | PCI Express (PCIe) |
| Input | Crystal | Crystal |
| Output | HCSL, LVCMOS | HCSL, LVCMOS |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:9 | 1:3 |
| Differential - Input: Output | No/Yes | No/Yes |
| Frequency - Max | 100MHz | 100MHz |
| Voltage - Supply | 1.7V ~ 1.9V | 1.7V ~ 1.9V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the 9FGV0241AKLF and 9FGV0841AKILF?
The 9FGV0241AKLF and 9FGV0841AKILF are Renesas (formerly IDT) FemtoClock NG series clock generators. The 9FGV0241AKLF is a 2-output PCIe Gen1/2/3 clock generator, while the 9FGV0841AKILF is an 8-output PCIe Gen1/2/3 clock generator. Both devices are designed for PCI Express clocking applications and are available in different package and output count configurations.
What is the difference in output count between the 9FGV0241AKLF and 9FGV0841AKILF?
The 9FGV0241AKLF provides 2 differential outputs, whereas the 9FGV0841AKILF provides 8 differential outputs. This difference makes the 9FGV0841AKILF suitable for systems requiring more PCIe clock lanes, while the 9FGV0241AKLF is intended for lower-output-count applications.
Are the 9FGV0241AKLF and 9FGV0841AKILF pin-to-pin compatible?
No. The 9FGV0241AKLF and 9FGV0841AKILF are not pin-to-pin compatible. They differ in output count, package type, and pin assignment. The 9FGV0241AKLF is typically offered in a smaller package, while the 9FGV0841AKILF uses a larger package to accommodate the additional outputs. A direct drop-in replacement is not possible without PCB redesign.
Do both devices support PCIe Gen1, Gen2, and Gen3 clocking?
Yes. Both the 9FGV0241AKLF and 9FGV0841AKILF support PCI Express Gen1, Gen2, and Gen3 reference clock requirements. They are designed to meet the phase jitter and spread spectrum requirements of these PCIe generations when used with an appropriate crystal or reference input.
What are the operating temperature ranges for the 9FGV0241AKLF and 9FGV0841AKILF?
The 9FGV0241AKLF is specified for the commercial temperature range of 0°C to +70°C. The 9FGV0841AKILF is specified for the industrial temperature range of -40°C to +85°C. The "I" in the 9FGV0841AKILF part number indicates industrial temperature support, while the 9FGV0241AKLF is a commercial-grade device.
Can the 9FGV0241AKLF be used as a substitute for the 9FGV0841AKILF in an existing design?
No. The 9FGV0241AKLF cannot directly substitute for the 9FGV0841AKILF because it has fewer outputs (2 vs. 8), a different package, and a different pinout. Additionally, the 9FGV0241AKLF is rated only for commercial temperature range, while the 9FGV0841AKILF supports industrial temperature range. Substitution would require a complete design review and PCB modification.
What output types do the 9FGV0241AKLF and 9FGV0841AKILF provide?
Both devices provide differential clock outputs compatible with PCIe requirements. The 9FGV0241AKLF offers 2 differential output pairs, and the 9FGV0841AKILF offers 8 differential output pairs. The outputs are typically HCSL-compatible, which is standard for PCIe reference clock distribution.
Are the 9FGV0241AKLF and 9FGV0841AKILF RoHS compliant?
Yes. Both the 9FGV0241AKLF and 9FGV0841AKILF are RoHS-compliant devices as stated in their respective Renesas datasheets and product pages. They are lead-free and meet current environmental regulations for electronic components.