The STMicroelectronics M24C08-WMN6 is an I2C serial EEPROM with 8 Kbit of non-volatile storage organized as 1K x 8 bits. Its 900 ns access time sets the minimum wait-state window the host MCU must observe between issuing a read command and clocking out the first data byte. At the 400 kHz I2C bus clock, that translates to roughly one clock cycle of dead time before the slave starts driving SDA — well within the typical MCU I2C peripheral's timing budget, but worth checking if you are bit-banging the bus in firmware. The 5 ms write-cycle time for a page or word write means the bus is busy during that interval; the host must either poll the acknowledge polling sequence or insert a 5 ms delay before the next write. For high-throughput logging, a larger page-size EEPROM or a serial Flash would be a better fit.
The M24C08-WMN6 is officially obsolete per STMicroelectronics. No direct replacement has been announced in the M24C08 series. For new designs, consider the M24C08-RMN6 (same I2C 8Kbit EEPROM in 8-SOIC, with an extended temperature range) or the M24C08-FMN6 (same footprint, wider voltage range) — both are active and pin-compatible.