AT24C256_AT24C512 Two-Wire Serial EEPROM

Specifications

Product Overview

AT24C256_AT24C512 is categorized as a Memory component and product type two-wire serial EEPROM. The extracted datasheet facts specifically describe AT24C128/AT24C256 behavior, including 131,072/262,144-bit memory density and 16,384 x 8 / 32,768 x 8 organization. The devices use a two-wire serial interface and support up to four devices on the same bus through A1 and A0 device address inputs.

The memory array is organized as 256/512 pages of 64 bytes each, with partial page writes allowed. Random word addressing uses 14/15-bit data word addresses for AT24C128/AT24C256 respectively. Write operation details include a self-timed write cycle with a 5 ms maximum for process letter B devices, while endurance is specified as 100k or 1,000,000 cycles depending on condition.

Package availability spans 8-lead JEDEC PDIP, JEDEC SOIC, EIAJ SOIC, MAP, TSSOP, SAP, and 8-ball dBGA2. Electrical coverage includes supply ranges from 1.8 V to 5.5 V across listed options, standby current down to 0.2 uA typical for the 1.8 V option, open-drain bidirectional SDA, and hardware write protection using WP. The datasheet also notes AT24C256 is not recommended for new design and refers designers to AT24C256B.

Key Features

• Two-wire serial EEPROM memory interface
• 131,072/262,144-bit density options
• 16,384 x 8 / 32,768 x 8 organization
• 64-byte page write operation
• Partial page writes are allowed
• Up to four devices per bus
• Open-drain bidirectional SDA output
• Hardware write protection through WP pin
• 1.8 V to 5.5 V operating ranges
• Industrial and extended temperature operation
• 40-year data retention specification
• Lead-free/halogen-free devices available

Typical Applications

• Two-wire EEPROM memory storage
• Addressed serial memory buses
• Multi-device EEPROM bus designs
• Hardware write-protected memory
• Industrial temperature memory systems
• Extended temperature memory systems
• 64-byte page write storage
• Open-drain serial data buses

Procurement Notes

When requesting a quote for AT24C256_AT24C512, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.

If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.

For memory and storage sourcing, density, organization, speed grade, voltage, package, temperature grade, date code, lifecycle status and original packing condition should be verified before approval.