Description
The Atmel® AT25320B/640B provides 32768-/65536-bits of serial electrically-erasable programmable read-only memory (EEPROM) organized as 4096/8192 words of 8-bits each. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The AT25320B/640B is available in space-saving 8-lead JEDEC SOIC, 8-lead UDFN, 8-lead XDFN, 8-lead TSSOP, and 8-ball VFBGA packages.

FEATUREs
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
   – Datasheet Describes Mode 0 Operation
• Low-voltage and Standard-voltage Operation
   – 1.8 (VCC = 1.8V to 5.5V)
• 20MHz Clock Rate (5V)
• 32-byte Page Mode
• 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
• Self-timed Write Cycle (5ms max)
• High Reliability
   – Endurance: One Million Write Cycles
   – Data Retention: 100 Years
• Green (Pb/Halide-free/RoHS Compliant) Packaging Options
• Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers