Part A
9DBL0452BKILFT
Renesas Electronics Corporation
- Lifecycle
- Active
- Stock
- 1308 Stückzahl
- Series
- Clock-Timing und anwendungsspezifische Clock-Timing
Replacement verdict
Compatible functional replacement candidate
The 9DBL0452BKILFT and 9DBL0951BKILF are both 3.3V zero-delay clock buffers from Renesas with compatible supply voltage, output type, and operating temperature range, making the 9DBL0951BKILF a viable functional replacement candidate for the 9DBL0452BKILFT in applications where the reduced output count is acceptable. However, the difference in output channel count and package footprint requires careful validation before substitution.
Output Type
High match
Supply Voltage
High match
Output Channel Count
Validation required
Package Type
Validation required
Parts at a glance
Part B
9DBL0951BKILF
Renesas Electronics America Inc.
- Lifecycle
- Active
- Stock
- 8029 Stückzahl
- Package
- VFQFN-48
- Series
- Takt- und anwendungsspezifisch
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 9DBL0452BKILFT | 9DBL0951BKILF | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics | Renesas Electronics | Same manufacturer ensures consistent design methodology and support ecosystem. |
| Function | Clock Buffer / Fanout Buffer | Clock Buffer / Fanout Buffer | Both serve as clock distribution buffers, but output count and configuration differ. |
| Number of Outputs | 4 | 9 | Output count determines how many clock loads can be driven from a single device. |
| Input Type | Differential (HCSL/LVDS) | Differential (HCSL/LVDS) | Input compatibility affects which clock sources can drive the buffer. |
| Output Type | HCSL | HCSL | Output signaling standard must match downstream receiver requirements. |
| Supply Voltage | 3.3 V | 3.3 V | Supply voltage must match the system power rail for proper operation. |
| Package | 32-VFQFN | 48-VFQFN | Package footprint and pin count affect PCB layout and board space. |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | Temperature range must cover the application's environmental conditions. |
| Maximum Output Frequency | 200 MHz | 200 MHz | Frequency capability must meet the clock rate required by the system. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 9DBL0452BKILFT | 9DBL0951BKILF |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Obsolete | Active |
| PLL | Yes | Yes |
| Main Purpose | PCI Express (PCIe) | PCI Express (PCIe) |
| Input | HCSL | HCSL |
| Output | HCSL | HCSL |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:4 | 1:9 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Frequency - Max | 200MHz | 200MHz |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | 9DBL0452 | - |
| Digi Key Programmable | Not Verified | - |
| Packaging | Tape & Reel (TR) | - |
Frequently asked questions
What are the 9DBL0452BKILFT and 9DBL0951BKILF?
The 9DBL0452BKILFT and 9DBL0951BKILF are Renesas (formerly IDT) zero-delay/fanout clock buffers from the 9DBL series. Both are 3.3V differential clock buffers intended for PCIe and similar high-speed clock distribution applications, supplied in a 32-pin VFQFPN package and specified over the industrial temperature range.
How do the output configurations of the 9DBL0452BKILFT and 9DBL0951BKILF differ?
The 9DBL0452BKILFT provides 4 differential outputs, while the 9DBL0951BKILF provides 9 differential outputs. The suffix digit in each part number denotes the output count, so the 9DBL0951BKILF offers more fanout capability than the 9DBL0452BKILFT.
Are the 9DBL0452BKILFT and 9DBL0951BKILF pin-compatible?
No. Although both devices use the same 32-pin VFQFPN package outline, they are not pin-compatible because the 9DBL0951BKILF routes additional differential output pairs to pins that serve different functions on the 9DBL0452BKILFT. A PCB layout designed for one device cannot be populated directly with the other without verification against the respective datasheet pin assignments.
Can the 9DBL0452BKILFT and 9DBL0951BKILF be used interchangeably in an existing design?
No. Because the output count and pin assignments differ, the two devices are not drop-in replacements. Any substitution requires reviewing the pinout, output termination, and board layout against the manufacturer datasheet for the specific device being used.
What supply voltage and output type do the 9DBL0452BKILFT and 9DBL0951BKILF use?
Both devices operate from a 3.3V nominal supply and provide differential clock outputs suitable for high-speed clock distribution. Designers should confirm the exact VDD range, output amplitude, and termination requirements in the respective Renesas datasheets before finalizing a design.
What package and temperature grade do the 9DBL0452BKILFT and 9DBL0951BKILF share?
Both parts are offered in a 32-pin VFQFPN package and are rated for the industrial temperature range, indicated by the "I" in the ordering code. The "LF" suffix denotes Pb-free/RoHS-compliant packaging, and the "T" suffix on the 9DBL0452BKILFT indicates tape-and-reel packing.
Which device should be selected for a design requiring more clock fanout?
The 9DBL0951BKILF should be selected when more differential clock outputs are required, since it provides 9 outputs versus 4 outputs on the 9DBL0452BKILFT. The choice depends on the number of downstream clock loads and the available board space, and both options should be validated against the target PCIe or clock distribution requirements.