Part A
9DBL0452BKILFT
Renesas ÉLECTRONIQUE
- Lifecycle
- Active
- Stock
- 1308 PCS
- Series
- Horloge Timing - Horloge timing pour une application spécifique
Replacement verdict
Compatible functional replacement candidate
The 9DBL0452BKILFT and 9DBL0442BKILF are functionally compatible clock buffer devices from the same family, sharing identical package, pinout, and supply voltage characteristics. The 9DBL0452BKILFT offers a higher output count, making it a viable replacement candidate where additional outputs are required, though output configuration and load conditions should be validated against the target application.
Output Type
High match
Package Type
High match
Output Count
Validation required
Supply Voltage
High match
Parts at a glance
Part B
9DBL0442BKILF
Renesas ÉLECTRONIQUE
- Lifecycle
- Active
- Stock
- 2772 PCS
- Series
- Horloge Timing - Horloge timing pour une application spécifique
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 | 9DBL0442BKILF | Why it matters |
|---|---|---|---|
| Output Frequency Range | Up to 200 MHz | Up to 200 MHz | Determines the maximum clock rate the buffer can distribute to downstream devices. |
| Number of Outputs | 4 | 4 | Defines how many clock loads can be driven from a single device. |
| Output Type | LVCMOS | LVCMOS | Must match the input logic family of the receiving components for proper signal levels. |
| Input Type | LVCMOS | LVCMOS | Determines compatibility with the upstream clock source driving the buffer. |
| Supply Voltage | 3.3 V | 3.3 V | Must match the system power rail to avoid level shifting or damage. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Ensures reliable operation across the intended environmental conditions. |
| Package / Case | 32-VFQFN | 32-VFQFN | Footprint and thermal characteristics must match the PCB layout for drop-in compatibility. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must align with the manufacturing process. |
| Additive Jitter | Low (typical < 1 ps RMS) | Low (typical < 1 ps RMS) | Affects signal integrity and timing margin in high-speed clock distribution. |
| Output Skew | Low (typical < 50 ps) | Low (typical < 50 ps) | Minimizes timing mismatch between multiple clock outputs. |
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 | 9DBL0452BKILFT | 9DBL0442BKILF |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| Base Product Number | 9DBL0452 | 9DBL0442 |
| Digi Key Programmable | Not Verified | Not Verified |
| 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 | 1:4 |
| 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 |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel (TR) | Tray |
Frequently asked questions
What are the key differences between the 9DBL0452BKILFT and the 9DBL0442BKILF?
The 9DBL0452BKILFT and 9DBL0442BKILF are both 3.3V differential clock buffers from Renesas. The primary difference is the output count: the 9DBL0452BKILFT provides 4 differential outputs, while the 9DBL0442BKILF provides 2 differential outputs. Both are pin-compatible in the same 32-pin VFQFPN package, but the 9DBL0442BKILF has fewer active output pins.
Are the 9DBL0452BKILFT and 9DBL0442BKILF pin-to-pin compatible?
Yes, both devices are offered in the same 32-pin VFQFPN package with identical pinouts. The 9DBL0442BKILF simply does not use all of the output pins that are active on the 9DBL0452BKILFT. This allows a common PCB layout to support either device, provided unused outputs are properly terminated or left unconnected per the datasheet.
Can the 9DBL0442BKILF be used as a drop-in replacement for the 9DBL0452BKILFT?
Not directly as a functional drop-in replacement if all 4 outputs are required. The 9DBL0442BKILF provides only 2 differential outputs, so any design relying on 4 outputs from the 9DBL0452BKILFT would lose 2 output channels. However, if the application only needs 2 outputs, the 9DBL0442BKILF can be used in the same footprint.
What is the operating supply voltage and temperature range for these clock buffers?
Both the 9DBL0452BKILFT and 9DBL0442BKILF operate from a 3.3V nominal supply and are specified for the industrial temperature range of -40°C to +85°C. These parameters are consistent across both variants per the Renesas datasheet.
Do the 9DBL0452BKILFT and 9DBL0442BKILF support the same output signal type?
Yes, both devices provide differential outputs compatible with HCSL (High-Speed Current Steering Logic) levels, making them suitable for PCI Express and other high-speed clock distribution applications. The output signaling characteristics are identical between the two variants.
What is the difference in power consumption between the 9DBL0452BKILFT and 9DBL0442BKILF?
The 9DBL0452BKILFT typically consumes more supply current than the 9DBL0442BKILF because it drives 4 differential outputs instead of 2. Exact current consumption depends on output loading and frequency; refer to the Renesas datasheet for specific IDD and power dissipation figures for each variant.
Are the 9DBL0452BKILFT and 9DBL0442BKILF RoHS compliant and lead-free?
Yes, both the 9DBL0452BKILFT and 9DBL0442BKILF are offered in RoHS-compliant, lead-free packages. The "LF" suffix in the part number indicates lead-free construction, and the "T" suffix on the 9DBL0452BKILFT indicates tape-and-reel packaging.
What applications are suitable for the 9DBL0452BKILFT versus the 9DBL0442BKILF?
The 9DBL0452BKILFT is suited for systems requiring 4 differential clock outputs, such as multi-slot PCIe backplanes or servers with multiple peripheral cards. The 9DBL0442BKILF is appropriate for designs needing only 2 differential outputs, offering a lower-power and lower-cost solution for simpler clock trees.