AT24C1024 , I2C , 2-Wire Serial EEPROM 1024Kbits (131,072 x 8) EEPROM

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The AT24C1024 provides 1,048,576 bits of serial electrically erasable and program-mable read only memory (EEPROM) organized as 131,072 words of 8 bits each. Thedevice’s cascadable feature allows up to two devices to share a common two-wirebus. The device is optimized for use in many industrial and commercial applicationswhere low-power and low-voltage operation are essential. The devices are availablein space-saving 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead Leadless Array (LAP) and 8-lead SAP packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V)versions.

Datasheet Download

DEVICE/ADDRESSES (A1): The A1 pin is a device address input that can be hardwired or left not connected for hardware compatibility with other AT24Cxx devices. When the A1 pin is hardwired, as many as two 1024K devices may be addressed on a single bus system (device addressing is discussed in detail under the Device Addressing section). If the A1 pin is left floating, the A1 pin will be internally pulled down to GND if the capacitive coupling to the circuit board VCC plane is <3 pF. If coupling is >3 pF, Atmel recommends connecting the A1 pin to GND.

AT24C1024, 1024K SERIAL EEPROM: The 1024K is internally organized as 512 pages of 256 bytes each. Random word addressing requires a 17-bit data word address.


• Low-Voltage and Standard-Voltage Operation
       –  2.7 (VCC = 2.7V to 5.5V)
       –  1.8 (VCC = 1.8V to 5.5V)
• Low-Power Devices (ISB = 2μA at 5.5V) Available
• Internally Organized 131,072 x 8
• 2-Wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• 1 MHz (5V), 400 kHz (2.7V, 2.5V) and 100 kHz (1.8V) Compatibility
• Write Protect Pin for Hardware Data Protection
• 256-byte Page Write Mode (Partial Page Writes Allowed)
• Self-Timed Write Cycle (10 ms max)
• High Reliability
     –  Endurance: 1 Million Write Cycles
     –  Data Retention: 40Years
•Automotive Grade and Extended Temperature Devices Available
•8-Pin JEDEC PDIP, 8-Pin JEDEC SOIC, 8-Pin EIAJ SOIC, and 8-pin TSSOP Packages

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