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AT24C128

Microchip 128Kb (16KB) I²C EEPROM · 400 kHz Fast Mode · SOIC-8 / DIP-8 · 1M Endurance Cycles

In StockManufacturer: Microchip TechnologyCategory: EEPROM
Specifications
Part NumberAT24C128
ManufacturerMicrochip Technology (Atmel)
Density128 Kb (16,384 bytes = 16 KB)
Organization16,384 × 8 bits
InterfaceI²C (2-wire Serial)
Max Clock400 kHz (Fast Mode)
PackageSOIC-8 / DIP-8 / TSSOP-8
Supply Voltage1.8 V – 5.5 V (AT24C128C)
Operating Temp−40°C to +85°C
Endurance1,000,000 write cycles
Data Retention100 years
Supply Voltage1.8 V – 5.5 V
Active Current3 mA typical (read/write)
Standby Current5 µA typical
SDA OutputOpen-drain (requires pull-up)
Address PinsA0, A1 (2-bit address select, 4 devices on bus)
Write ProtectWP pin (hardware write protection)
SCL FrequencyUp to 400 kHz (Fast Mode)
Page Write Size64 bytes per page
Page Write Time5 ms maximum
Random Read TimeClock-speed dependent
Sequential ReadSupports auto-increment addressing
SOIC-8AT24C128C-SSHM-T
DIP-8AT24C128C-PUM-T
Lead Time3–7 business days
PackagingTape & Reel / Tube
Product Description

The AT24C128 is Microchip's 128Kb (16KB) serial EEPROM with I²C interface, offering up to 400kHz Fast Mode operation across a wide supply voltage range of 1.8V to 5.5V. With an endurance of 1 million write cycles and 100-year data retention, it is one of the most reliable choices for embedded configuration storage.

In drone and autopilot applications, the AT24C128 stores flight controller configuration data, PID profiles, sensor calibration values, RC channel maps, and firmware startup parameters. It's also used for I²C address tables in distributed avionics systems.

AT24C Series Capacity Selection

  • AT24C02: 2Kb (256B) — minimal config, ID storage
  • AT24C128: 128Kb (16KB) — FC parameters + calibration data
  • AT24C256: 256Kb (32KB) — full autopilot parameter sets
  • AT24C512: 512Kb (64KB) — extended log storage
UAV Applications
FC Config Storage
PID parameters, RC maps, failsafe settings, and calibration data stored in non-volatile EEPROM
GPS Module Config
u-blox GPS configuration persistence — stores UBX protocol settings across power cycles
ESC Parameters
Motor direction, current limits, and telemetry settings stored in smart ESC firmware
Sensor Calibration
Gyroscope offset, magnetometer calibration matrix, barometer baseline stored in EEPROM
Related EEPROM Products
  • AT24C256
    256Kb (32KB) · Larger capacity for full autopilot configs
    In StockQuote
  • AT24C512
    512Kb (64KB) · Maximum capacity AT24C series
    In StockQuote
  • 24LC256
    Microchip 256Kb · I2C EEPROM · Low-voltage compatible
    In StockQuote

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