32Kbit I2C EEPROM in 8-TSSOP — fit for the BOM
The STMicroelectronics M24C32-XDW5TP is a 32Kbit serial EEPROM organized as 4K x 8 bits, communicating over an I2C bus at up to 1 MHz. It stores configuration parameters, calibration data, or small firmware look-up tables in designs that need non-volatile retention without a battery. The 1.6V to 5.5V supply range makes it a single-rail fit for 1.8V, 2.5V, 3.3V, or 5V logic domains — no level translator needed for the I2C lines when the MCU shares the same rail.
Supply range and 3.3V compatibility
The 1.6V minimum supply covers 1.8V logic without a separate regulator. At 3.3V — the most common I2C bus voltage — the part operates comfortably in the middle of its range, so the I2C timing specs (450 ns access, 1 MHz clock) hold without derating. The 5.5V maximum means it can also sit on a legacy 5V bus alongside 5V-tolerant I2C masters.
Temperature grade — indoor and commercial enclosures
For a -40°C cold-start requirement, the M24C32-FDW6TP sibling offers the extended low end while keeping the same 8-TSSOP footprint.
Write cycle timing for firmware updates
A full 32Kbit page-mode write takes about 5 ms per page — budget around 320 ms for a complete device rewrite if you are updating a calibration table at production end-of-line. The I2C interface acknowledges each byte, so the host can poll for ACK to confirm the write completed before sending the next page.
Package and ordering code note
If your pick-and-place line feeds from reels, this is the correct ordering code. For hand-assembly or small-batch prototyping, the tube-packaged variant (M24C32-WDW6TP) shares the same die and footprint.