FM24C02B 2-Wire Serial EEPROM Low-Power Memory Solution for Antminer S19j pro+

FM24C02B 2-Wire Serial EEPROM | Low-Power Memory for Antminer S19j Pro+

The FM24C02B 2-wire serial EEPROM is a low-power, low-voltage non-volatile memory chip used on Antminer S19j Pro+ hashboards and control circuits to store calibration data, identifiers, and configuration parameters. Designed for industrial and commercial applications, it delivers 2048 bits of serial electrically erasable and programmable read-only memory in a compact, surface-mount footprint — exactly what hashboard and control board designs require for persistent on-board data.

The FM24C02B is organized as 256 words of 8 bits each, runs at low operation voltage, and offers 5V tolerant I/O for clean integration alongside mixed-voltage logic. Its endurance and retention specs (1,000,000 write cycles and up to 100 years of data retention) make it dependable for repair scenarios where the original EEPROM has been corrupted, erased, or physically damaged during board servicing.

High-Reliability and Data Retention for Critical Applications

Beyond raw capacity, the FM24C02B integrates the protection features needed in noisy industrial environments. The chip uses a Schmitt trigger and filtered inputs for noise suppression, supports bi-directional data transfer protocol over its 2-wire bus, and includes a write protect pin with partial page write support to safeguard stored data during firmware operations. Together, these features reduce the risk of memory corruption during voltage transients or write operations on a live board.

FM24C02B Repair Use Cases on Antminer Hashboards

On Antminer S19j Pro+ hashboards, the EEPROM holds the data the firmware reads at boot to recognize, calibrate, and address each chain. When this chip fails, the board can drop offline, refuse to start hashing, or report mismatched chain data. Replacing the FM24C02B with a fresh chip and re-flashing the correct calibration data is a standard repair path used by repair shops and mining farms.

FM24C02B Technical Features

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Repair centers and mining farms ordering FM24C02B in volume can contact contact@lys-sz.com for tray-quantity pricing and priority fulfillment. Worldwide shipping from our Shenzhen warehouse.