AT24C02N-10SU-2.7 EEPROM Memory IC for Whatsminer M20S Hashboard
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AT24C02N EEPROM 2Kbit – Whatsminer M20S Hashboard Configuration Memory
The AT24C02N-10SU-2.7 is a 2Kbit (256×8) EEPROM in an 8-SOIC package, communicating over a 400kHz I²C bus. It operates from 2.7V to 5.5V with a write cycle time of 5ms and access time of 900ns. On the Whatsminer M20S hashboard, this EEPROM stores the board's serial number, chip calibration data and operating parameters that the firmware reads at startup to identify and configure the hashboard.
Why EEPROM Failures Cause Detection Issues
When the miner boots, the control board reads each hashboard's EEPROM to identify the board model, chip count and voltage/frequency tables. A corrupted or failed EEPROM returns invalid data — the firmware either refuses to start hashing on that board or applies incorrect operating parameters that cause immediate errors. Replacing the EEPROM and reprogramming with correct data restores normal board identification.
Replacement Procedure
Remove the hashboard and locate the AT24C02N near the data connector — it is a standard 8-pin SOIC. Desolder with hot air at 300–320°C, clean pads and install the new chip with pin 1 aligned. After soldering, program the EEPROM with the correct hashboard data using an I²C programmer or the miner's built-in write function. Reinstall and verify normal startup and board detection.
AT24C02N EEPROM Specifications
| Parameter | Value |
|---|---|
| Part Number | AT24C02N-10SU-2.7 |
| Manufacturer | Microchip Technology |
| Memory Size | 2Kbit (256×8) |
| Interface | I²C (400kHz) |
| Supply Voltage | 2.7V – 5.5V |
| Write Cycle | 5ms |
| Temperature Range | -40°C to 85°C |
| Package | 8-SOIC |
| Condition | New (original) |
Related EEPROM & Whatsminer Hashboard Components
- AT24C02CXHMT EEPROM – IceRiver KS5L Hashboard
- ATH915 AT24C02D EEPROM – Antminer S19 / T19 Hashboard
- EEPROM Memory – Antminer T17e / S17e / S19 Hydro
- KF1921 ASIC Chip – Whatsminer M20 / M20S Hashboard
Sourcing EEPROMs for Whatsminer repair? Contact us at contact@lys-sz.com for memory ICs and programming support.
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