Common extensions of IC to indicate Temperature

Generally, the temperature levels of common IC are represented by C (commercial level) and I (industrial level), which are usually given in the suffix of IC. The following uses Maxim's max696cwe as an example to illustrate (different brands and different types of chips are represented in different ways. Here, we will only make a reference ):
Max696cwe
C = the operating temperature range is commercial grade (0 °C to + 70 °C)

The following table lists the replaceable letters and corresponding temperature levels:
Temperature range letter
Commercial Grade C 0 °C to + 70 °C
Automotive AEC-Q100 2 class G-40 °C to + 105 °C
Automotive AEC-Q100 Class 0 T-40 °C to + 150 °C
Extended commercial u 0 °C to + 85 °C
Automotive AEC-Q100 Class 1 A-40 °C to + 125 °C
Industrial I-20 °C to + 85 °C
Extended industrial grade E-40 °C to + 85 °C
Military grade m-55 °C to + 125 °C