Renesas 9DB106BGILFT

Overview

9DB106BGILFT from Renesas Electronics (formerly IDT) is a six-output, 0.7V current-mode differential buffer optimized for PCIe Gen 1 and Gen 2 clock distribution. It accepts a differential SRC input clock, provides jitter attenuation via selectable PLL bandwidth (0.4–3 MHz), supports spread-spectrum tracking, and features two CLKREQ# pins for ExpressCard applications. Designed for low-skew, high-fidelity clock fanout in server and embedded PCIe systems.

For engineers reviewing the 9DB106BGILFT datasheet, 9DB106BGILFT pinout, 9DB106BGILFT application, or 9DB106BGILFT equivalent, key selection criteria include PCIe Gen 2 phase jitter (≤3.1 ps RMS), output-to-output skew (<50 ps), HCSL-compatible 0.7V differential outputs, SMBus programmability, and industrial temperature support (−40°C to +85°C).

Technical Context

The 9DB106BGILFT implements a dual-bandwidth PLL with configurable loop bandwidth (0.4–1 MHz low-band or 2–3 MHz high-band) to minimize jitter peaking in downstream receivers. Its PLL core operates from dedicated VDDA/GNDA supplies, while outputs are driven by 3.3V logic rails and calibrated via IREF (475 Ω to ground) for precise 100 Ω differential impedance matching.

It integrates an SMBus interface (5V-tolerant SMBDAT/SMBCLK) for runtime control of PLL mode, bandwidth selection, and individual output enable/disable. Two dedicated CLKREQ# inputs (pins 4 and 25) allow dynamic gating of output pairs 1 and 4, enabling power-aware ExpressCard slot management without external logic.

Key Specifications

Pinout & Package

9DB106BGILFT is housed in a 28-pin TSSOP package (JEDEC MO-153, 9.60–9.80 mm × 4.30–4.50 mm, 0.65 mm pitch), rated for industrial temperature range (−40°C to +85°C). Pin compatibility matches 9DB106BGLF/BGILF variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe clock buffer applications.

Compared with 9DB106BGILFT, the 9DB105BGILFT reduces output count but retains identical jitter performance and industrial temperature rating, while the PI6C557-03LEX trades configurability and express features for lower channel count and simplified interface - making it suitable only for non-dynamic, lower-lane-count deployments.

Availability

9DB106BGILFT is available at Aetrix Electronics and suitable for PCIe add-in card design, server backplane timing, ExpressCard controller implementation, and industrial embedded PCIe platforms requiring stable component supply across extended temperature ranges.

Supply support for 9DB106BGILFT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, infrastructure, and IoT applications.

The 9DB106BGILFT belongs to Renesas' high-performance timing portfolio, originally developed by IDT, and is engineered specifically for low-jitter PCIe Gen 1/2 clock distribution in space-constrained, thermally demanding systems.

FAQ

What is the primary function of the 9DB106BGILFT in a PCIe system?

The 9DB106BGILFT serves as a six-output, zero-delay differential clock buffer that distributes and cleans a PCIe reference clock. It attenuates input jitter using a configurable PLL, delivers six matched HCSL outputs with <50 ps skew, and supports spread-spectrum tracking - ensuring robust PCIe Gen 1 and Gen 2 link timing integrity across multi-lane configurations.

Does the 9DB106BGILFT support both PCIe Gen 1 and Gen 2 timing requirements?

Yes, the 9DB106BGILFT is explicitly designed for PCIe Gen 1 and Gen 2 compliance. Its phase jitter is specified at ≤3.1 ps RMS (8–16 MHz band) and cycle-to-cycle jitter at <50 ps - meeting PCIe Gen 2 electrical specifications. It operates across the standard 100 MHz reference frequency used in both generations.

How is the PLL bandwidth configured on the 9DB106BGILFT?

The PLL bandwidth on the 9DB106BGILFT is configured either via the dedicated PLL_BW pin (pin 1) or through the SMBus interface. A logic-high level selects high-bandwidth mode (2–3 MHz), while logic-low selects low-bandwidth mode (0.4–1 MHz). This dual-control method allows both hardware-strapped and software-programmable configuration.

What is the role of the IREF pin (pin 26) on the 9DB106BGILFT?

The IREF pin (pin 26) on the 9DB106BGILFT establishes the reference current for all six HCSL output drivers. When terminated to ground with a precision 475 Ω resistor, it sets a 2.32 mA reference current, enabling accurate 0.7 V output voltage into 100 Ω differential loads - ensuring consistent drive strength and impedance matching across all outputs.

Is the 9DB106BGILFT compatible with ExpressCard applications?

Yes, the 9DB106BGILFT includes two dedicated CLKREQ# inputs (pins 4 and 25) that directly enable or disable output pairs 1 and 4. This native support simplifies ExpressCard slot power management and hot-plug detection, eliminating the need for external logic and aligning with ExpressCard specification timing requirements.