1. Non-Volatile Memory Function: The MCP48FEB18T-16E/ST integrates EEPROM, which retains the DAC configuration code (output level) after power loss. The MCP48FVB18T-16E/ST utilizes volatile memory, where the configuration is lost upon power-down. In systems employing the volatile version, the host MCU must reconfigure the output value of each DAC channel via SPI after every power cycle; otherwise, the output enters an indeterminate state. This increases software complexity and power-on initialization time, and requires the MCU to be operational immediately after the DAC is powered. 2. Implied Endurance and Cost: The EEPROM-integrated version has a limited write endurance (typically ≥1 million cycles), making it suitable for applications requiring frequent saving of specific setpoints. The volatile version has no such limitation and generally incurs slightly lower wafer manufacturing costs. In applications requiring extremely high-frequency dynamic updates of DAC settings with guaranteed uninterrupted power, the volatile version holds a theoretical advantage in operational lifetime.