9DBL411BGLFT - 150MHz 4-Output PCIe Fanout Buffer | Renesas
MPN: 9DBL411BGLFT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.8708 | $0.87 |
| 10 | $0.8708 | $8.71 |
| 100 | $0.8708 | $87.08 |
| 500 | $0.8708 | $435.40 |
| 1,000 | $0.8708 | $870.80 |
9DBL411BGLFT Overview
A PCI Express fanout buffer is a clock-distribution and differential-signal-integrity component used to provide one input signal with multiple low-skew copies. In a larger system, the device sits between a clock source or upstream transceiver and several PCI Express destinations. Its four-output architecture reduces the need for duplicated clock-generation circuits, while individual output enables permit unused outputs to be disabled during test or power-management conditions.
The key verified characteristics are a 3 V to 3.6 V supply range, 150 MHz maximum operating frequency, 50 ps skew, output-cycle-to-cycle jitter below 25 ps additive, and four individually controlled output enables. The package is identified as a surface-mount TSSOP-20 with a 4.40 mm body and 0.65 mm pitch, and the source material identifies it as RoHS compliant. The low-power differential-output architecture is intended for high-speed communication equipment, including PCIe and QPI clock or signal distribution.
The 9DBL411 is especially relevant where a system needs multiple copies of a 3.3 V differential signal and predictable output-enable control. Compared with a generic single-output clock driver, it consolidates four output pairs in one device. Compared with a central buffer that lacks per-output control, it allows each destination to be enabled or disabled separately. The 150 MHz operating limit should still be checked against the actual interface requirement, especially when retiming, cable loss, or receiver tolerance affects the system design.
Typical applications include PCI Express endpoint and root-complex clock distribution, QPI interface distribution, server and workstation motherboard clock trees, high-speed interface test equipment, and industrial communication modules using differential signaling. In each case, the designer must preserve the differential pair geometry, provide the required input and output termination specified by the system architecture, and validate timing, power, and enable sequencing at the board level.
A critical design consideration is that this is a differential fanout buffer rather than a general-purpose regulator or logic gate. Route each differential pair as a controlled-impedance connection, minimize stubs and mismatched branches, and confirm OE# polarity and timing before enabling downstream receivers. Verify the complete datasheet for exact pin names, recommended termination, and application-specific timing margins.
This page combines verified distributor and manufacturer information with package, application, sourcing, and design guidance to help engineers evaluate the 9DBL411BGLFT. It is intended as a concise engineering reference rather than a substitute for the manufacturer datasheet, especially for pin-level implementation and production qualification.
Drop-in alternatives for 9DBL411BGLFT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
9DBL411A
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
9DBL411BGLFT Specifications
| Product Type | 4-output low-power differential fanout buffer |
| Maximum Operating Frequency | 150 MHz |
| Supply Voltage Range | 3 V to 3.6 V |
| Number of Outputs | 4 differential output pairs |
| Output Enable Control | Individual OE# control for each output pair |
| Input Signal | Differential input |
| Output Signal | Low-power differential output pairs |
| Skew | 50 ps |
| Output Cycle-to-Cycle Jitter | Less than 25 ps additive |
| PCI Express Support | PCIe Gen1, Gen2, and Gen3 |
| Interface Support | PCI Express and QPI |
| Package Type | TSSOP-20, surface mount |
| Package Body Size | 4.40 mm |
| Package Pitch | 0.65 mm |
| RoHS Status | Compliant |
| Lifecycle Status | Active |
9DBL411BGLFT 0.65 mm Pin Configuration Guide
Pin configuration for 9DBL411BGLFT (0.65 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for 9DBL411BGLFT.
Refer to the datasheet for full pin configuration.
Typical Applications
9DBL411BGLFT is suitable for 6 applications: PCI Express Clock Distribution, QPI Interface Distribution, Server Motherboard Clock Trees, PCI Express Endpoint Interface, High-Speed Test Equipment, Industrial Communication Modules.
PCI Express Clock Distribution
The Renesas 9DBL411BGLFT fits PCI Express clock-distribution points that need one differential source feeding several destinations. Its four differential output pairs and 150 MHz maximum operating frequency provide a compact fanout structure for Gen1, Gen2, and Gen3-oriented systems identified in the verified data. Individual OE# inputs let a system enable only the outputs needed by a particular link or power state. The designer should place the device near the clock source, route each differential pair with controlled impedance, and verify termination and receiver timing against the selected PCIe generation.
Recommended
QPI Interface Distribution
The 9DBL411BGLFT is identified with QPI applications and provides four independently controlled differential output pairs for distributing a high-speed signal. This makes it useful where a controller, processor, or transceiver must reach multiple QPI-connected destinations while maintaining controlled timing relationships. The 50 ps skew and less-than-25 ps additive output-cycle-to-cycle jitter figures provide useful design targets, but actual margin depends on trace loss, receiver thresholds, clock quality, and board topology. Confirm differential impedance and OE# timing with the complete datasheet.
Recommended
Server Motherboard Clock Trees
A four-output differential fanout buffer can simplify clock-tree organization in server and workstation motherboards that require multiple high-speed destinations. The 3 V to 3.6 V supply range and 150 MHz operating ceiling align with the 3.3 V interface environment described for the device. Independent OE# control supports staged enable sequences or test isolation, while the low-power differential outputs reduce the need for separate buffers at every branch. Place the part before long fanout traces, minimize branch mismatch, and validate insertion loss and jitter at each receiver.
Recommended
PCI Express Endpoint Interface
The 9DBL411BGLFT can serve as a local fanout element in a PCI Express endpoint or interface-conditioning path when several clock or differential-signal destinations need coordinated drive strength. Its four outputs reduce fanout-component count, while per-output OE# control allows unused branches to remain disabled. The design must account for package parasitics, trace geometry, receiver capacitance, and the relationship between output-enable timing and link training. Verify the official datasheet for recommended termination and application circuits before layout release.
Recommended
High-Speed Test Equipment
The 9DBL411BGLFT is suitable for laboratory and production test equipment that distributes PCIe or QPI-compatible differential signals to multiple test points or instrument channels. Four independently controlled output pairs allow the test system to isolate channels or apply different enable states during characterization. The 150 MHz maximum frequency, 50 ps skew, and less-than-25 ps additive output jitter are useful constraints when building repeatable test fixtures. At high test rates, use short controlled-impedance paths, defined terminations, and careful probe or connector transitions.
Recommended
Industrial Communication Modules
The 9DBL411BGLFT can support industrial communication modules that distribute a 3.3 V differential signal among multiple interface sections while maintaining a controlled 150 MHz operating limit. The four-output architecture allows one source to serve several destinations without duplicating the entire buffer function, and individual OE# pins support local power-management or fault-isolation strategies. Because industrial environments may add temperature, vibration, and grounding requirements, verify the full operating-temperature and reliability information in the manufacturer documentation before qualification.
Recommended
Engineering reference data for 9DBL411BGLFT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 9DBL411A |
|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics |
Key Differentiators
- Four-output differential fanout in one device (vs 9DBL411A)
- Per-output enable control (vs 9DBL411A)
- PCI Express and QPI positioning (vs 9DBL411A)
Design Notes
Treat every differential output as a controlled-impedance high-speed route rather than a general-purpose logic trace. Keep the positive and negative conductors closely coupled, minimize stubs and branch-length mismatch, and place the buffer near the source when possible. Validate insertion loss, return loss, pair polarity, and receiver thresholds with the complete PCIe or QPI system budget.
Do not assume that the four output enables are interchangeable with a global power-down function. The verified information identifies a separate OE# control for each output pair, so firmware and board design must honor the required enable polarity and sequencing. Confirm the pin names and timing behavior in the official datasheet before connecting downstream receivers.
Use a compact fanout layout with the 20-pin TSSOP device placed where the input and four differential output pairs can branch without long stubs. Provide local supply bypassing according to the manufacturer application guidance, maintain a continuous ground reference, and avoid routing unrelated fast signals beneath or between differential pairs. The supplied data confirms TSSOP-20, 4.40 mm body, and 0.65 mm pitch package details.
Compliance Information
The verified DigChip specification identifies the device as RoHS compliant. The supplied data does not provide verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for this MPN.
