Description: The IDT5P50901/2/3/4 is a family of 1.8V low power, spread spectrum clock generators capable of reducing EMI radiation from an input clock. Spread spectrum technique is capable of reducing the harmonic frequency amplitude peaks by several dB. The IDT5P50902 accepts an input clock frequency from 20 MHz to 50 MHz and produces an output clock of the same frequency, with a modulation frequency of ICLK*27/20000. The spread amount can be chosen through the select pins on the device.
Renesas provides a recommended PCB layout guide in their application note (AP61101) for the 5P50902NBGI8. It suggests using a 4-layer PCB with a solid ground plane, placing thermal vias under the package, and using a thermal pad on the bottom side of the PCB.
To ensure reliable operation in high-temperature environments, it's essential to follow Renesas' thermal design guidelines, use a suitable thermal interface material, and consider using a heat sink or fan. Additionally, ensure that the device is operated within its specified temperature range (–40°C to +85°C).
The input capacitors should be low-ESR, high-frequency capacitors with a minimum capacitance of 10uF and a voltage rating of at least 6.3V. Renesas recommends using X5R or X7R dielectric capacitors, such as Murata's GRM155R60H103KA01D or similar.
To troubleshoot issues with the power-good (PG) signal, check the voltage levels on the input and output rails, ensure that the PG pin is properly connected to a pull-up resistor, and verify that the PG signal is not being loaded excessively. Also, consult Renesas' application notes and technical support resources for guidance.
If the enable (EN) pin is not used, the device will always be enabled, which may lead to increased power consumption and heat generation. It's recommended to use the EN pin to control the device's power state, especially in battery-powered applications.
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5P50902NBGI8 Overview
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