The AT24C04B is a 4 Kbit (512 x 8) Serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) from Atmel. Like other members of the AT24CXX family, it utilizes a two-wire serial interface (I2C) for communication, making it easy to interface with microcontrollers. The AT24C04B is designed for low-power applications, and it is used to store configuration data, user preferences, or other small data sets. Because it is designated as END-OF-LIFE, it will be found primarily in older systems.
Applications:
- Consumer Electronics: Storing user preferences and settings in devices such as TVs, set-top boxes, and audio equipment.
- Industrial Control Systems: Storing calibration data and configuration parameters for sensors and other industrial devices.
- Medical Devices: Storing device-specific information and calibration data.
- Automotive Applications: Storing configuration data for automotive electronics.
Features:
- 4 Kbit (512 x 8) EEPROM: Provides non-volatile storage for data retention even when power is removed.
- Two-Wire Serial Interface (I2C): Uses a simple two-wire interface for communication with a microcontroller.
- Low-Voltage Operation: Operates at low voltages, typically 1.8V to 5.5V.
- Low Power Consumption: Minimizes power consumption for battery-powered applications.
- Write Protection: Offers a write protection feature to prevent accidental data modification.
- Self-Timed Write Cycle: Automatically manages the write cycle, simplifying programming.
Benefits:
- Non-Volatile Storage: Retains data even when power is removed.
- Easy to Use: Simple I2C interface simplifies integration with microcontrollers.
- Low Power: Suitable for battery-powered devices.
- Small Size: Compact package for space-constrained applications.
Additional Details:
The AT24C04B uses the I2C communication protocol. The I2C protocol requires only two wires for communication: SDA (Serial Data) and SCL (Serial Clock). The device address is used to select the specific AT24C04B device on the I2C bus. The device supports both byte write and page write operations, which can improve write performance. The write protection feature prevents accidental data modification. The self-timed write cycle simplifies programming. Although END-OF-LIFE, maintaining older systems with this EEPROM may require sourcing and using this part.