AT24C256B Datasheet | Atmel

Features - 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 k Hz (1.8V) patibility - 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 Cycles - Data Retention: 40 Years - Lead-free/Halogen-free Devices Available - 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, EIAJ SOIC, 8-lead Ultra Thin Small Array Package (SAP), 8-lead TSSOP, and 8-ball d BGA2 Packages - Die Sales: Wafer Form, Waffle Pack and Bumped Wafers Two-wire Serial EEPROM 256K (32,768 x 8) Description The AT24C256B provides 262,144 bits of serial electrically erasable and programmable read-only memory (EEPROM) organized as 32,768 words of 8 bits each. The device’s cascadable feature allows up to eight devices to share a mon two-wire bus. The device is optimized for use in many industrial and mercial applications where low-power and low-voltage operation are essential. The devices are available in space-saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin SAP, 8lead TSSOP, and 8-ball d BGA2 packages. In addition, the entire family is available in a 1.8V (1.8V to 5.5V) version. Not Remended for New Design Pin Configurations 8-lead PDIP 8-lead SOIC Pin Name A0- A2 SDA SCL WP GND Function Address Inputs Serial Data Serial Clock Input Write Protect Ground A0 A1 A2 GND 1 2 3 4 8 VCC A0 7 WP A1 6 SCL A2 5 SDA GND 1 2 3 4 8 VCC 7 WP 6 SCL 5 SDA 8-lead d...