1. LM95245CIMM/NOPB Substitution Conclusion Substitution is feasible only under specific conditions, making it a restricted or downgraded replacement. The key differences are as follows: 1) Supply Voltage Range: The LM95245's range (3V to 3.6V) is significantly narrower than the SA56004's (3V to 5.5V). If the original system operates above 3.6V (e.g., a 5V rail), direct replacement is impossible, necessitating a redesign of the power supply. 2) Operating Temperature Range: The LM95245 has a maximum local and remote measurement temperature of 85°C, which is lower than the SA56004's 125°C. This makes the LM95245 unsuitable for high-temperature environments (e.g., monitoring points near power components), limiting its application scope. 3) Communication Interface: The LM95245 supports only SMBus, whereas the SA56004 supports both I2C and SMBus. Although SMBus is a subset of I2C, it imposes stricter timing and electrical specifications. Software driver compatibility must be verified. 4) Accuracy: Over a wider temperature range (-40°C to 25°C), the LM95245's worst-case accuracy (±6°C) is inferior to the SA56004's (±3°C), potentially leading to larger measurement deviations in the low-temperature region. Although the LM95245 offers more features, higher remote sensor resolution (12-bit), and a pin-compatible package, the limitations in these core parameters define it as a non-"drop-in" replacement.