Description:The 9DB306 is a high performance 1-to-6 Differential-to- LVPECL Jitter Attenuator designed for use in PCI Express®™ systems. In some PCI Express® systems, such as those found in desktop PCs, the PCI Express® clocks are generated from a low bandwidth, high phase noise PLL frequency synthesizer. In these systems, a zero delay buffer may be required to attenuate high frequency random and deterministic jitter components from the PLL synthesizer and from the system board. The 9DB306 has 2 PLL bandwidth modes. In
Renesas provides a recommended PCB layout guide in their application note (APN) documents, which includes thermal design considerations, such as thermal vias, copper pours, and component placement. It's essential to follow these guidelines to ensure optimal thermal performance.
The 9DB306BLLFT has an internal overcurrent protection (OCP) feature, but it's recommended to implement an external OCP circuit to provide additional protection. This can be achieved using a dedicated OCP IC or a discrete component solution, such as a sense resistor and a comparator.
The input capacitor selection depends on the specific application requirements, such as input voltage, current, and ripple. Renesas recommends using a low-ESR capacitor with a value between 10uF to 22uF, and a voltage rating that matches the input voltage. It's essential to consider the capacitor's ripple current rating, as well.
To ensure EMC compliance, follow Renesas' guidelines for PCB layout, component selection, and shielding. Additionally, consider using EMI filters, such as common-mode chokes or ferrite beads, to reduce electromagnetic interference. It's also essential to perform EMC testing and certification according to relevant standards, such as CISPR or FCC.
Renesas recommends using a thermal interface material (TIM) with a thermal conductivity of at least 1 W/m-K. Examples of suitable TIMs include thermal tapes, thermal greases, or thermal pads. It's essential to follow the manufacturer's application guidelines and ensure a uniform TIM layer to achieve optimal thermal performance.
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9DB306BLLFT Overview
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