AT24C256CDRG

The AT24C256C is a 256 Kbit I²C-compatible serial EEPROM. The device is designed to operate across a supply voltage range of 1.7V to 5.5V, with a maximum transfer rate of 1MHz. The operating temperature range is -40°C to +105°C. The device integrates a write protection pin for hardware write protection of the entire memory array. The serial EEPROM is organized as 512 pages of 64 bytes each, totaling 32768×8 bits. The device provides users with an additional 64-byte identification page for storing sensitive application parameters. Once application data is written to the identification page, it can be permanently locked to read-only mode. The AT24C256C also features a separate memory block containing a factory-programmed 128-bit unique ID. This block operates in read-only mode and is accessible by issuing a specific read command. The AT24C256C is available in lead-free green packages: DIP-8, TSSOP-8, SOP-8, MSOP-8.

Key features

• Supply voltage: 1.7V to 5.5V
• 2-wire serial interface, I²C compatible
• Compatible with 400kHz and high-speed 1MHz transfer rates
• Byte and page (up to 64 bytes) write modes
• Partial page write supported
• Self-timed write cycle (3ms max)
• Hardware write protection for entire memory array
• Additional 64-byte writable lockable page and 128-bit unique ID
• Schmitt trigger inputs with noise suppression filtering
• Low operating current
• Write current: 1mA max
• Read current: 0.5mA max
• Standby current: 1μA max
• High reliability
• Endurance: 2,000,000 write cycles
• Data retention: 100 years
• Operating temperature range: -40°C to +105°C
• Green package options (lead-free / halogen-free / RoHS compliant)
• Package types: DIP-8, TSSOP-8, SOP-8, MSOP-8