Description
The Microchip AT24C256C is a 256Kb Serial EEPROM utilizing an I2C (2-wire) serial interface. The device is organized as one block of 32K x 8 and is optimized for use in consumer, industrial, and automotive applications where reliable and dependable nonvolatile memory storage is essential. The EEPROM is available in a variety of space-saving packaging options.
Features of AT24C256 EEPROM
• Low-voltage and Standard-voltage Operation
– 1.8 (VCC = 1.8V to 5.5V)
• Internally Organized as 32,768 x 8
• Two-wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• 1 MHz (5.0V, 2.7V, 2.5V), and 400 kHz (1.8V) Compatibility
• Write Protect Pin for Hardware and Software Data Protection
• 64-byte Page Write Mode (Partial Page Writes Allowed)
• Self-timed Write Cycle (5 ms Max)
• High Reliability
– Endurance: One Million Write Cycle
AT24C256 Pinout
| Number | Pin | Function |
| 1 | A0 | Address Input |
| 2 | A1 | Address Input |
| 3 | A2 | Address Input |
| 4 | GND | Ground |
| 5 | SDA | Serial Data |
| 6 | SCL | Serial Clock |
| 7 | WP | Write Protect |
| 8 | VCC | Power Supply |
AT24C256 EEPROM Applications
- Data Logging
- Audio devices
- Remote storage devices
- Data analytics
- Storage devices
- Used where Flash memory of MCU is less
