The maximum operating frequency of the TL16C554APNRG4 is 16.5 MHz, but it can be overclocked up to 20 MHz with some limitations.
The thermal shutdown feature is activated when the junction temperature exceeds 150°C. To handle this, ensure proper heat sinking, reduce power consumption, and implement thermal monitoring and shutdown mechanisms in your design.
A simple POR circuit can be implemented using a resistor, capacitor, and diode. TI recommends a 10kΩ resistor, 10uF capacitor, and 1N4148 diode. This ensures a clean power-on reset and prevents latch-up conditions.
To optimize for low power consumption, use the lowest possible clock frequency, enable the power-down mode when not transmitting, and use the built-in sleep mode. Additionally, consider using a lower voltage supply and optimizing the external circuitry for low power consumption.
Follow TI's recommended layout and routing guidelines, including keeping the signal traces short, using a solid ground plane, and avoiding vias under the device. Also, ensure that the clock signal is routed away from the analog signals to minimize noise coupling.