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AT93C66A - Three-wire Serial EEPROM

Download the AT93C66A datasheet PDF. This datasheet also covers the AT93C56A variant, as both devices belong to the same three-wire serial eeprom family and are provided as variant models within a single manufacturer datasheet.

General Description

The AT93C56A/66A provides 2048/4096 bits of serial electrically erasable programmable read-only memory (EEPROM) organized as 128/256 words of 16 bits each (when the ORG pin is connected to VCC) and 256/512 words of 8 bits each (when the ORG pin is tied to grou

Key Features

  • Low-voltage and Standard-voltage Operation.
  • 2.7 (VCC = 2.7V to 5.5V).
  • 1.8 (VCC = 1.8V to 5.5V).
  • User-selectable Internal Organization.
  • 2K: 256 x 8 or 128 x 16.
  • 4K: 512 x 8 or 256 x 16.
  • Three-wire Serial Interface.
  • Sequential Read Operation.
  • 2 MHz Clock Rate (5V).
  • Self-timed Write Cycle (10 ms Max).
  • High Reliability.
  • Endurance: 1 Million Write Cycles.
  • Data Retention: 100 Years.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AT93C56A-ATMEL.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
AT93C66 3-wire Serial EEPROMs ATMEL Corporation
AT93C66B Three-wire Serial EEPROM Microchip
AT93C46 3-Wire Serial EEPROMs ATMEL Corporation
AT93C46D 3-wire Serial EEPROM ATMEL Corporation
AT93C46D Three-Wire Serial EEPROM Microchip

Other Datasheets by Atmel (now Microchip Technology)

Part Number Description
AT93C66B Three-wire Serial Electrically Erasable Programmable Read-only Memory
AT93C56A Three-wire Serial EEPROM
AT93C56B Three-wire Serial Electrically Erasable Programmable Read-only Memory
AT93C57 3-Wire Serial EEPROMs
AT90LS4434 8-bit Microcontroller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
1. Features • Low-voltage and Standard-voltage Operation – 2.7 (VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 5.5V) • User-selectable Internal Organization – 2K: 256 x 8 or 128 x 16 – 4K: 512 x 8 or 256 x 16 • Three-wire Serial Interface • Sequential Read Operation • 2 MHz Clock Rate (5V) • Self-timed Write Cycle (10 ms Max) • High Reliability – Endurance: 1 Million Write Cycles – Data Retention: 100 Years • Automotive Devices Available • 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead Ultra Thin mini-MAP (MLP 2x3), 8-lead Ultra Lead Frame Land Grid Array (ULA), 8-lead TSSOP and 8-ball dBGA2 Packages Three-wire Serial EEPROM 2K (256 x 8 or 128 x 16) 4K (512 x 8 or 256 x 16) 2.