The key to reliable operation is ensuring that the temperature limits of components are not exceeded. Usually a component will have two different temperature limits, the recommended maximum temperature and the absolute maximum temperature.

The recommended maximum temperature ($T_{max-rec}$) is the temperature at which the component’s performance is guaranteed. Exceeding this temperature will not damage the part but may cause undesirable component operation such as reduced timing performance or frequency drift. Therefore, during operation up to the maximum ambient temperature the Tmax-rec of each component should not be exceeded.

The absolute maximum temperature ($T_{max-abs}$) is exceeded the component may begin to be damaged.