Description
The AT25HP256/512 provides 262,144/524,288 bits of serial electrically erasable programmable read only memory (EEPROM) organized as 32,768/65,536 words of 8-bits each. The device is optimized for use in many industrial and commercial applications where high-speed, low-power, and low-voltage operation are essential. The AT25HP256/512 is available in a space saving 8-lead PDIP (AT25HP256/512), 8-lead EIAJ SOIC (AT25HP256), 16-lead JEDEC SOIC (AT25HP512), 8-lead Leadless Array (AT25HP256/512) package, and 8-lead SOIC Array package (SAP). In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions.

Features
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• 128-byte Page Mode Only for Write Operations
• Low-voltage and Standard-voltage Operation
   – 2.7 (VCC = 2.7V to 5.5V)
   – 1.8 (VCC = 1.8V to 5.5V)
• 10 MHz (5V), 5MHz (2.7V) and 2 MHz (1.8V) Clock Rate
• Block Write Protection
• Protect 1/4, 1/2, or Entire Array
• Write Protect (WP) Pin and Write Disable Instructions for
   both Hardware and Software Data Protection
• High Reliability
   – Endurance: 100K Write Cycles
   – Data Retention: >40 Years
• 8-lead PDIP, 8-lead EIAJ SOIC, 16-lead JEDEC SOIC, 8-lead Leadless Array Package,
   and 8-lead SOIC Array Package (SAP)
• Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers