24LC04B 4Kbit (512B) I²C Serial EEPROM IC DIP-8 – Microchip

24LC04B 4Kbit (512 Bytes) I²C Serial EEPROM IC – DIP-8

The 24LC04B from Microchip Technology is a 4Kbit (512 bytes) I²C serial EEPROM in a through-hole DIP-8 package – the smallest practical EEPROM in the 24Cxxx family. With 512 bytes of non-volatile storage accessible over a 2-wire I²C interface, it's ideal for storing small amounts of configuration data, calibration values, and device settings that must survive power cycles. The DIP-8 package is ideal for breadboard prototyping and through-hole PCB designs.

Electrical Specifications

• Part Number: 24LC04B / 24LC04B-I/P / AT24C04
• Package: DIP-8 (through-hole, 2.54mm pitch)
• Capacity: 4Kbit = 512 bytes
• Interface: I²C (2-wire: SDA + SCL)
• I²C Speed: 400kHz (Fast Mode)
• Supply Voltage: 2.5V – 5.5V
• I²C Address: 0x50–0x51 (A1, A2 ignored; A0 selects upper/lower 256 bytes)
• Page Write Size: 16 bytes
• Write Cycle Time: 5ms (typical)
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years
• Operating Temperature: −40°C to +85°C

24Cxxx Capacity Comparison – Choose the Right Size

• 24LC04B: 512 bytes – device ID, serial number, small config (this listing)
• 24LC64F: 8KB – sensor logs, calibration tables
• 24LC256: 32KB – data logging, large configuration
• 24LC512: 64KB – maximum standard I²C EEPROM capacity

Typical Applications

• Device configuration: Store device ID, serial number, and factory settings
• Calibration storage: Store sensor offset and gain calibration values
• User preferences: Persistent settings for small embedded devices
• Arduino EEPROM expansion: Add 512 bytes of external non-volatile storage
• Boot configuration: Store startup parameters for microcontrollers

Package Contents

• 1 × 24LC04B DIP-8 4Kbit I²C EEPROM IC

512 bytes of reliable I²C non-volatile storage in a breadboard-friendly DIP-8 package – the 24LC04B is the right choice when you need just enough EEPROM for device configuration and calibration data.

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