Atmel AT93C56A/66A EEPROM Datasheet

Datasheet for Atmel's 2048/4096-bit serial EEPROM with 1 million write cycles and 100-year data retention.


Atmel AT93C56A/66A EEPROM Datasheet - cover page
Brand
Atmel
Category
EEPROM
Document type
Datasheet
Language
English
Pages
23
File format
PDF
File size
442 KB
Published
30 October, 2026
Updated
30 October, 2026
MD5 checksum
162F26AF267A73B1FA28F7DA65BD13AB

About this manual

The AT93C56A/66A is a serial EEPROM offering 2048 or 4096 bits of memory in 128/256 or 256/512 word configurations. It supports low-voltage (1.8V–5.5V) and standard-voltage (2.7V–5.5V) operation with a three-wire serial interface. The device features self-timed write cycles, 1 million write endurance, and 100-year data retention. It is available in multiple 8-lead packages including PDIP, SOIC, TSSOP, and BGA2. Programming is controlled via seven instructions including READ, ERASE, WRITE, and EWEN.

What's inside

  • Features
  • Description
  • Pin Configurations
  • Absolute Maximum Ratings
  • DC Characteristics
  • AC Characteristics
  • Instruction Set
  • Functional Description
  • Timing Diagrams

Specifications

Memory Size2048/4096 bits
Organization128/256 words of 16 bits each or 256/512 words of 8 bits each
Operating Voltage1.8V to 5.5V or 2.7V to 5.5V
Write Endurance1 million write cycles
Clock Rate2 MHz (at 5V)
Package Types8-lead PDIP, SOIC, TSSOP, BGA2, ULA, MLP 2x3

Frequently asked questions

What is the write endurance of the AT93C56A/66A?

The device has 1 million write cycles endurance.

What voltage ranges does it support?

It supports 1.8V to 5.5V and 2.7V to 5.5V.

What are the available package types?

It is available in 8-lead PDIP, SOIC, TSSOP, BGA2, ULA, and MLP 2x3 packages.

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