Description:The 9LPRS477 is a main clock synthesizer chip that provides all clocks required for ATI RD7xx-based systems using AMD processors. An SMBus interface allows full control of the device.
Renesas provides a recommended PCB layout guide in their application notes (e.g., AN9834) and evaluation board documentation. It's essential to follow these guidelines to ensure optimal performance, especially for high-frequency signals.
The 9LPRS477CKLF has a thermal pad on the bottom, which requires proper thermal management. Use a thermal interface material (TIM) and a heat sink or thermal vias to dissipate heat. Ensure good airflow and avoid blocking the thermal pad.
The input clock signal should be a stable, low-jitter clock with a frequency range of 10 MHz to 40 MHz. The clock signal should be AC-coupled and have a peak-to-peak amplitude of 2.5 V to 3.3 V.
To configure the 9LPRS477CKLF for low-power operation, use the Power Management Interface (PMI) to control the power modes. Set the PMI registers to enable low-power modes, such as sleep or standby, and adjust the clock frequency and voltage to minimize power consumption.
To mitigate EMI and RFI, use proper PCB layout techniques, such as separating analog and digital signals, using ground planes, and adding shielding. Additionally, use EMI filters, chokes, or ferrite beads on the input/output lines, and ensure that the device is properly grounded.
Trust Checks
This model has been built in collaboration with the manufacturer.
Manufacturer Collaborated
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
9LPRS477CKLF Overview
Use the download button to access the 9LPRS477CKLF schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like 9LPRS,
or try a keyword search, such as Clock Generators
