AT24C256 DIP-8 EEPROM IC

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AT24C256 DIP‑8 EEPROM IC The AT24C256 DIP‑8 EEPROM IC provides 262,144 bits of two‑wire serial electrically erasable and programmable memory organized as 32,768 × 8 bits. Operating from 1.8 V to 5.5 V, it supports up to four devices on a single bus, offers self‑timed write cycles, and is optimized for low‑power industrial and commercial applications. Features 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 16,384 x 8 and 32,768 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 64-byte Page Write Mode (Partial Page Writes Allowed) Self-Timed Write Cycle (10 ms max) Automotive Grade and Extended Temperature Devices Available Specifications Parameter Value Model AT24C256 Organization 32,768 × 8 bits Supply Voltage (VCC) 1.8–3.6 V; 2.7–5.5 V Interface Two‑wire serial (I²C‑compatible) Clock Rate (fSCL) 100 kHz @1.8 V; 400 kHz @2.7 V; 1 MHz @5 V Page Write Size 64 bytes Write Cycle Time (tWR) 5 ms max Endurance 1 000 000 write cycles Data Retention 40 years Operating Temperature –55 °C to +125 °C Package 8‑lead JEDEC PDIP (also SOIC, TSSOP, MAP) Pin Count 8 PINOUT Pin No Pin Name Description 1 A0 User Configurable Chip Select 2 A1 User Configurable Chip Select 3 NC No Connection 4 GND Ground Pin 5 SDA Serial Data Pin 6 SCL Serial Clock Pin 7 WP Write Protect Pin 8 VCC Power Supply Pin Applications Data Logging Audio devices Remote storage devices Data analytics Storage devices Used where Flash memory of MCU is less Datasheet AT24C256 EEPROM .