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24AA256UID

256K I2C Serial EEPROM with EUI-48™, EUI-64™ and Unique 32-Bit Serial Number

Microchip Technology 

24AA256UID

256K I2C Serial EEPROM with EUI-48™, EUI-64™ and

Unique 32-Bit Serial Number

Device Selection Table

Part Number

VCC

Range

Max. Clock

Frequency

24AA256UID

1.7V-5.5V

400 kHz(1)

Note 1: 100 kHz for VCC < 2.5V.

Temp.

Ranges

I

Page

Size

64-byte

EUI-48™

Yes

EUI-64™

Yes

Unique ID

Length

32-bit

Features

• Pre-Programmed 32-Bit Serial Number:

- Unique across all UID-family EEPROMs

- Scalable to 48-bit, 64-bit, 128-bit, 256-bit,

and other lengths

• Pre-Programmed Globally Unique, 48-bit or 64-bit

Node Address:

- Compatible with EUI-48™ and EUI-64™

• Codes Stored in Permanently Write-Protected

Upper 1/8th of EEPROM Array

• Single Supply with Operation Down to 1.7V

• Low-Power CMOS Technology:

- Active current 400 µA, typical

- Standby current 100 nA, typical

• 2-Wire Serial Interface, I2C Compatible

• Cascadable up to Eight Devices

• Schmitt Trigger Inputs for Noise Suppression

• Output Slope Control to Eliminate Ground Bounce

• 100 kHz and 400 kHz Clock Compatibility

• Page Write Time 5 ms Maximum

• Self-Timed Erase/Write Cycle

• 64-Byte Page Write Buffer

• ESD Protection >4000V

• More than One Million Erase/Write Cycles

• Data Retention >200 years

• Packages Include 8-lead PDIP, SOIC and TSSOP

• RoHS Compliant

• Temperature Ranges:

- Industrial (I): -40°C to +85°C

Description

The Microchip Technology Inc. 24AA256UID is a

32K x 8 (256 Kbit) Serial Electrically Erasable PROM

with pre-programmed EUI-48 and EUI-64 node

addresses and a 32-bit Unique ID, capable of operation

across a broad voltage range (1.7V to 5.5V). This

device also has a page write capability of up to 64 bytes

of data. This device is available in the standard 8-pin

plastic DIP, SOIC and TSSOP packages.

Block Diagram

A0 A1A2

HV Generator

I/O

Control

Logic

Memory

Control

Logic

I/O SCL

SDA

VCC

VSS

XDEC

EEPROM

Array

Page Latches

YDEC

Sense Amp.

R/W Control

Package Types

PDIP

SOIC/TSSOP

A0 1

A1 2

A2 3

VSS 4

8 VCC A0

1

7 NC A1 2

6 SCL A2 3

5 SDA VSS

4

8

VCC

7 NC

6 SCL

5 SDA

 2013-2016 Microchip Technology Inc.

DS20005215C-page 1

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