Description
The Atmel® AT25320B/640B provides 32768-/65536-bits of Serial Electricallyerasable Programmable Read-Only Memory (EEPROM) organized as 4096/8192 words of eight 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 TSSOP, 8-lead UDFN, 8-lead XDFN, 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
   ● 1.8V (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: 1,000,000 write cycles
   ● Data retention: 100 years
● Green (Pb/Halide-free/RoHS compliant) packaging options
● Die sales: wafer form, tape and reel, and bumped wafers