Part A
9DBL411BKLFT
Renesas Electronics America Inc
- Lifecycle
- Active
- Stock
- 5482 PCS
- Package
- VFQFN-20
- Series
- Clock-Timing - Application Specific
Replacement verdict
Compatible functional replacement candidate
The 9DBL411BKLFT and 9DBL411BKILF are functionally compatible clock buffer devices from the same 9DBL411B family, sharing identical output type, channel count, and package footprint. The primary distinction is the operating temperature range, where the 9DBL411BKILF offers an extended industrial temperature range compared to the 9DBL411BKLFT. Designers should validate thermal requirements against the target application before substituting, but the core electrical and functional characteristics support a drop-in replacement in most non-extreme-temperature designs.
Output Type
High match
Channel Count
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
9DBL411BKILF
Renesas Electronics America Inc
- Lifecycle
- Active
- Stock
- 7064 PCS
- Package
- VFQFN-20
- Series
- Clock-Timing - Application Specific
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 9DBL411BKLFT | 9DBL411BKILF | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics | Renesas Electronics | Same manufacturer ensures consistent design lineage and support. |
| Function | 3.3V Differential Clock Buffer / Fanout | 3.3V Differential Clock Buffer / Fanout | Identical core function is required for direct substitutability. |
| Number of Outputs | 4 | 4 | Output count must match to preserve clock tree topology. |
| Supply Voltage | 3.3 V | 3.3 V | Matching supply voltage allows drop-in replacement without rail changes. |
| Output Type | Differential (LVDS-compatible) | Differential (LVDS-compatible) | Signal interface must match to drive the same downstream receivers. |
| Operating Temperature Range | 0°C to +70°C | -40°C to +85°C | Industrial temperature range affects suitability for harsh or outdoor environments. |
| Package / Mounting | TSSOP-16, Surface Mount | TSSOP-16, Surface Mount | Same footprint and mounting allow physical interchangeability on the PCB. |
| Grade / Qualification | Commercial | Industrial | Qualification grade determines reliability in industrial vs. commercial applications. |
| Packaging | Tape & Reel | Tape & Reel | Same packaging supports automated assembly lines without retooling. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 9DBL411BKLFT | 9DBL411BKILF |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Active | Active |
| PLL | No | No |
| Main Purpose | Intel QPI, PCI Express (PCIe) | Intel QPI, PCI Express (PCIe) |
| Input | HCSL | HCSL |
| Output | LP-HCSL | LP-HCSL |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:4 | 1:4 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Frequency - Max | 150MHz | 150MHz |
| Voltage - Supply | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the 9DBL411BKLFT and the 9DBL411BKILF?
The primary difference is the operating temperature range. The 9DBL411BKLFT is specified for the commercial temperature range of 0°C to +70°C, while the 9DBL411BKILF is specified for the industrial temperature range of -40°C to +85°C. Both devices are otherwise functionally identical 3.3V zero-delay clock buffers from Renesas.
Are the 9DBL411BKLFT and 9DBL411BKILF pin-to-pin compatible?
Yes. Both devices are offered in the same 20-pin TSSOP package and share an identical pinout. The only difference is the temperature grade, so they are pin-to-pin compatible and can be used on the same PCB land pattern.
Can the 9DBL411BKLFT be used as a drop-in replacement for the 9DBL411BKILF?
Yes, provided the application operates within the commercial temperature range of 0°C to +70°C. The 9DBL411BKLFT is functionally identical to the 9DBL411BKILF but is only guaranteed over the narrower commercial range. If the application requires operation below 0°C or above +70°C, the industrial-grade 9DBL411BKILF must be used.
What is the function of the 9DBL411BKLFT and 9DBL411BKILF?
Both are 3.3V zero-delay clock buffers designed to distribute a single clock input to multiple outputs while maintaining low skew and jitter. They are typically used in applications such as networking, storage, and computing systems that require precise clock distribution.
What is the output configuration of the 9DBL411BKLFT and 9DBL411BKILF?
Both devices provide four differential clock outputs. The outputs are selectable between LVDS and LVPECL compatible levels, depending on the configuration of the output mode pins. This flexibility allows the same device to interface with different downstream clock receivers.
Do the 9DBL411BKLFT and 9DBL411BKILF support the same input frequencies?
Yes. Both devices support the same input frequency range and the same output frequency range, as they share the same internal PLL and buffer architecture. The input and output frequency specifications are identical between the two temperature grades.
Which part number should be selected for an industrial application?
The 9DBL411BKILF should be selected for industrial applications because it is guaranteed to operate over the -40°C to +85°C temperature range. The 9DBL411BKLFT is only guaranteed over the commercial range of 0°C to +70°C and should not be used outside that range.
Are the 9DBL411BKLFT and 9DBL411BKILF RoHS compliant?
Yes. Both the 9DBL411BKLFT and 9DBL411BKILF are offered in RoHS-compliant packages. The "LF" suffix in both part numbers indicates lead-free (Pb-free) construction, and the "T" suffix on the 9DBL411BKLFT indicates tape-and-reel packaging.