AT25040B Datasheet Spi Serial Eeprom

Manufacturer: Atmel (now Microchip Technology)

Overview: AT25010B, AT25020B, AT25040B SPI Serial EEPROM 1K (128x8), 2K (256x8), 4K.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	AT25040B
Manufacturer	Atmel (now Microchip Technology)
File Size	449.98 KB
Description	SPI Serial EEPROM
Datasheet	AT25040B AT25010B Datasheet (PDF)

General Description

The Atmel® AT25010B/020B/040B provides 1,024/2,048/4,096 bits of Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) organized as 128/256/512 words of 8 bits each.

The device is optimized for use in many indus

Key Features

Serial Peripheral Interface (SPI) Compatible.
Supports SPI Modes 0 (0,0) and 3 (1,1) ̶ Data Sheet Describes Mode 0 Operation.
Low-voltage and Standard-voltage Operation ̶ VCC = 1.8V to 5.5V.
20MHz Clock Rate (5V).
8-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 ̶ Enduran.

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