The Atmel 256K bit two-wire serial EEPROM with full memory write-protect, supports up to eight devices on a single two-wire bus. Memory organized as 32,768 words x 8 bits. Optimized for industrial and commercial applications where low-power and low-voltage operations are essential. The EEPROM is available in space-saving packaging options and operates from 1.7V to 5.5V.
Feature
Description
The AT24C256C 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 cascading feature allows up to eight devices to share a common 2‑wire bus. The device is optimized for use in many industrial and commercial applications where low‑power and low‑voltage operation are essential. The devices are available in space‑saving 8‑lead SOIC, 8‑lead TSSOP, 8‑pad UDFN and 8‑ball VFBGA packages. All packages operate from 1.7V to 5.5V.
Features
• Low-Voltage and Standard-Voltage Operation:
– VCC = 1.7V to 5.5V
• Internally Organized as 32,768 x 8 (256K)
• Industrial Temperature Range: -40°C to +85°C
• I2C-Compatible (2-Wire) Serial Interface:
– 100 kHz Standard mode, 1.7V to 5.5V
– 400 kHz Fast mode, 1.7V to 5.5V
– 1 MHz Fast Mode Plus (FM+), 2.5V to 5.5V
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• Write‑Protect Pin for Full Array Hardware Data Protection
• Ultra Low Active Current (3 mA maximum) and Standby Current (6 μA maximum)
• 64-Byte Page Write Mode:
– Partial page writes allowed
• Random and Sequential Read Modes
• Self‑Timed Write Cycle within 5 ms Maximum
• ESD Protection > 4,000V
• High Reliability:
– Endurance: 1,000,000 write cycles
– Data retention: 100 years
• Green Package Options (Lead-free/Halide-free/RoHS compliant)
• Die Sale Options: Wafer Form and Bumped Wafers
(Picture: Pinout)
