1. Configuration Data Storage: The MCP47FEB18‑16E/ST integrates EEPROM, which allows non‑volatile storage of DAC output levels, configuration bits, and other parameters; these settings are automatically restored after a power loss. The MCP47FVB18‑16E/ST employs volatile storage, meaning configuration data is lost upon power‑down and must be reconfigured by the host on every power‑up. 2. Design Impact: This difference dictates the system power‑on initialization sequence. When using the FVB variant, the host MCU must rewrite the DAC output value and configuration registers via I²C after every power‑up or reset; otherwise, the output will be in an undefined state. In contrast, the FEB variant enables “power‑up‑and‑go” operation, simplifying software design and making it more suitable for systems without a host controller or for applications requiring rapid establishment of a stable output. 3. Cost and Reliability: Typically, the EEPROM‑integrated version (FEB) carries a slightly higher cost. In applications involving frequent writes, attention must be paid to the EEPROM endurance limit (usually on the order of millions of cycles). The volatile version (FVB) has no such limitation but depends on system power integrity and software stability.