 2004 Microchip Technology Inc.

DS21126E-page 1

24FC32

Features

• Voltage operating range: 4.5V to 5.5V

- Maximum write current 3 mA at 5.5V

- Maximum read current 150

µA at 5.5V

- Standby current 1

µA typical

• 1 MHz SE2.bus two wire protocol

• Self-timed write cycle (including auto-erase)

• Power on/off data protection circuitry

• Endurance:

- 10,000,000 Erase/Write cycles ensured for a

4K block

- 1,000,000 E/W cycles ensured for a 28K

block

• 8-byte page, or byte modes available

• 1 page x 8 line input cache (64 bytes) for fast write

loads

• Schmitt Trigger inputs for noise suppression

• 2 ms typical write cycle time, byte or page

• Up to 8 chips may be connected to the same bus

for up to 256K bits total memory

• Electrostatic discharge protection > 4000V

• Data retention > 200 years

• 8-pin PDIP/SOIC packages

•

Temperature ranges

Description

The Microchip Technology Inc. 24FC32 is a 4K x 8 (32K

bit) Serial Electrically Erasable PROM (EEPROM) with

a high-speed 1 MHz SE2.bus whose protocol is

bus. This device has been developed for advanced,

low

power

applications

such

as

personal

communications or data acquisition. The 24FC32

features an input cache for fast write loads with a

capacity of eight 8-byte pages, or 64 bytes. It also

features a fixed 4K-bit block of ultra-high endurance

memory for data that changes frequently. The 24FC32

is capable of both random and sequential reads up to

the 32K boundary. Functional address lines allow up to

eight 24FC32 devices on the same bus, for up to 256K

bits address space. The 24FC32 is available in the

standard 8-pin plastic DIP and 8-pin surface mount

SOIC package.

Package Types

Block Diagram

Pin Function Table

- Commercial (C):

0°C

to

+70°C

- Industrial (I):

-40°C

to

+85°C

Name

Function

A0, A1, A2

User Configurable Chip Selects

Ground

SDA

Serial Address/Data I/O

SCL

Serial Clock

+4.5V to 5.5V Power Supply

NC

No Internal Connection

SOIC

1

2

3

4

8

7

6

5

Vcc

NC

SCL

SDA

A0

A1

A2

Vss

PDIP

1

2

3

4

8

7

6

5

Vcc

NC

SCL

SDA

A0

A1

A2

Vss

HV Generator

EEPROM

Array

Page Latches

YDEC

XDEC

Sense AMP

R/W Control

Memory

Control

Logic

I/O

Control

Logic

SDA

SCL

I/O

A2

A1

A0

Cache

Smart Serial is a trademark of Microchip Technology Inc.

Obsolete Device

Please use 24LC32A or 24LC65.