The STMicroelectronics M24C01-RDS6G is a 1 Kbit serial EEPROM with an I2C interface, organized as 128 x 8 bits. The 400 kHz clock frequency is the standard fast-mode I2C rate, so this part fits designs already running at that bus speed.
Obsolete — planning the BOM transition
That means STMicroelectronics has ceased production; no last-time-buy window remains. For a design already using this exact order code, the procurement path is surplus or broker channel. The base product number M24C01 has many active siblings — the M24C01-WDW6TP (TSSOP-8, same I2C interface) is a common drop-in candidate, but verify pin compatibility against your layout before committing the BOM.
