Description:The 2305 is a low phase noise, high-speed PLL based, low-skew zero delay buffer. Based on IDT's proprietary low jitter Phase Locked Loop (PLL) techniques, the device provides four low skew outputs at speeds up to 133 MHz at 3.3 V. The outputs can be generated from the PLL (for zero delay), or directly from the input (for testing), and can be set to tri-state mode or to stop at a low level. The PLL feedback is on-chip and is obtained from the CLKOUT pad. The 2305 is available in two different versions. The 2
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 2305-1HDCG 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 sense resistor and a comparator to monitor the current, and then trigger a shutdown or warning signal if the current exceeds a predetermined threshold.
The input capacitor selection depends on the specific application and operating conditions. However, as a general guideline, Renesas recommends using a low-ESR ceramic capacitor with a capacitance value between 4.7 μF and 10 μF, and a voltage rating that matches the input voltage range.
To ensure EMC compliance, follow Renesas' guidelines for PCB layout, component selection, and shielding. Additionally, consider using EMI filters, ferrite beads, and shielding components to reduce electromagnetic interference. It's also essential to perform EMC testing and certification according to relevant industry standards.
The maximum operating temperature range for the 2305-1HDCG is -40°C to +125°C, but this can vary depending on the specific package and application. It's essential to consult the datasheet and application notes for specific temperature ratings and derating guidelines.
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2305-1HDCG Overview
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