© 1996 Microchip Technology Inc.

DS21126B-page 3-1

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 guaranteed

for a 4K block

- 1,000,000 E/W cycles guaranteed 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

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 8 - 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.

- Commercial (C):

0˚C to

+70˚C

- Industrial (I):

-40˚C to

+85˚C

PACKAGE TYPES

BLOCK DIAGRAM

SOIC

1

2

3

4

8

7

6

5

NC

SCL

SDA

A0

A1

A2

PDIP

1

2

3

4

8

7

6

5

NC

SCL

SDA

A0

A1

A2

I/O

CONTROL

LOGIC

EEPROM

ARRAY

PAGE LATCHES

HV GENERATOR

SENSE AMP

R/W CONTROL

MEMORY

CONTROL

LOGIC

XDEC

YDEC

I/O

SCL

A0..A2

CACHE

SDA

24FC32

Smart Serial is a trademark of Microchip Technology Inc.

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