© 2005 Microchip Technology Inc.

DS21203N-page 1

24AA256/24LC256/24FC256

Device Selection Table

Features:

• Low-power CMOS technology:

- Maximum write current 3 mA at 5.5V

- Maximum read current 400

μA at 5.5V

- Standby current 100 nA, typical at 5.5V

• Cascadable for up to eight devices

• Self-timed erase/write cycle

• 64-byte Page Write mode available

• 5 ms max. write cycle time

• Hardware write-protect for entire array

• Output slope control to eliminate ground bounce

• Schmitt Trigger inputs for noise suppression

• 1,000,000 erase/write cycles

• Electrostatic discharge protection > 4000V

• Data retention > 200 years

• 8-pin PDIP, SOIC, TSSOP, MSOP and DFN

packages, 14-lead TSSOP package

• Pb-free finishes available

• Temperature ranges:

Description:

The Microchip Technology Inc. 24AA256/24LC256/

24FC256 (24XX256*) is a 32K x 8 (256 Kbit) Serial

Electrically Erasable PROM, capable of operation

across a broad voltage range (1.8V to 5.5V). It has

been developed for advanced, low-power applications

such as personal communications or data acquisition.

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

bytes of data. This device is capable of both random

and sequential reads up to the 256K boundary.

Functional address lines allow up to eight devices on

the same bus, for up to 2 Mbit address space. This

device is available in the standard 8-pin plastic DIP,

SOIC, TSSOP, MSOP and DFN packages.

Block Diagram

Package Types

*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.

Part

Number

Range

Max. Clock

Frequency

Temp.

Ranges

24AA256

1.8-5.5V

I

24LC256

2.5-5.5V

400 kHz

I, E

24FC256

1.8-5.5V

I

Note 1:

2:

- Industrial (I):

-40

°C to +85°C

- Automotive (E):

-40

°C to +125°C

HV Generator

EEPROM

Array

Page Latches

YDEC

XDEC

Sense Amp.

R/W Control

Memory

Control

Logic

I/O

Control

Logic

I/O

A0 A1A2

SDA

SCL

WP

A0

A1

A2

WP

SCL

SDA

1

2

3

4

8

7

6

5

PDIP/SOIC

TSSOP/MSOP*

A0

A1

A2

1

2

3

4

8

7

6

5

WP

SCL

SDA

DFN

A0

A1

A2

WP

SCL

SDA

5

6

7

8

4

3

2

1

Note: * Pins A0 and A1 are no connects for the MSOP package only.