4 Mbit SPI EEPROM for non-volatile parameter storage
The 25CSM04T-I/MF is a 4 Mbit serial EEPROM organized as 512K x 8 bits, accessed through an SPI bus at up to 8 MHz. It stores configuration data, calibration constants, or firmware parameters that must survive power loss — typical for industrial controllers, metering equipment, and embedded systems that log or retain state across reboots.
Industrial temperature and package fit for reflow assembly
Housed in an 8-WDFN with exposed pad (5x6 mm footprint), the package requires a thermal land on the PCB to draw heat from the die into the board plane. The exposed pad is the primary thermal path — without a soldered pad connection, junction temperature rises faster under continuous write cycles. The 5 ms page write cycle means a single 256-byte page takes 5 ms to program; a full 4 Mbit chip rewrite at 512 pages per write cycle budgets roughly 2.6 seconds of total write time, which matters for firmware-update windows or high-frequency data logging.
Active lifecycle and compliance documentation
CT is a cut length for prototype or low-volume builds.