Maxim provides a recommended PCB layout in the application note AN1916, which includes guidelines for component placement, trace routing, and grounding to minimize EMI and noise.
The MAX491EESD-T requires a proper power-up sequence, which involves applying VCC before EN. The EN pin should be tied to a logic high or left open to enable the device. Additionally, the device requires a 10kΩ pull-up resistor on the EN pin to ensure proper operation.
The MAX491EESD-T can support cable lengths up to 100 meters, depending on the cable type and quality. However, it's recommended to use cables with a characteristic impedance of 100Ω to minimize signal reflections and ensure reliable operation.
Yes, the MAX491EESD-T is designed to support hot-swap applications. It has built-in overcurrent protection and can withstand voltage transients during hot-swap events. However, it's essential to follow proper hot-swap design guidelines and ensure that the device is properly powered down before removal.
To troubleshoot issues with the MAX491EESD-T, start by verifying the power supply voltage, EN pin state, and output voltage. Check for proper PCB layout, component placement, and soldering. Use an oscilloscope to measure the output voltage and verify that it's within the specified range. Consult the datasheet and application notes for additional troubleshooting guidance.
MAX491EESD-T datasheet
by Maxim Integrated Products
