FM24C04U/05U – 4K-Bit Standard 2-Wire Bus Interface Serial EEPROM

August 2000

FM24C04U/05U – 4K-Bit Standard 2-Wire Bus

Interface Serial EEPROM

General Description

The FM24C04U/05U devices are 4096 bits of CMOS non-volatile

electrically erasable memory. These devices conform to all speci-

fications in the Standard IIC 2-wire protocol. They are designed to

minimize device pin count and simplify PC board layout require-

ments.

The upper half (upper 2Kbit) of the memory of the FM24C05U can

be write protected by connecting the WP pin to V

CC

. This section of

memory then becomes unalterable unless WP is switched to V

SS

.

This communications protocol uses CLOCK (SCL) and DATA

I/O (SDA) lines to synchronously clock data between the master

(for example a microprocessor) and the slave EEPROM device(s).

The Standard IIC protocol allows for a maximum of 16K of

EEPROM memory which is supported by the Fairchild family in

2K, 4K, 8K, and 16K devices, allowing the user to configure the

memory as the application requires with any combination of

EEPROMs. In order to implement higher EEPROM memory

densities on the IIC bus, the Extended IIC protocol must be used.

(Refer to the FM24C32 or FM24C65 datasheets for more informa-

tion.)

Fairchild EEPROMs are designed and tested for applications requir-

ing high endurance, high reliability and low power consumption.

Features

I

Extended operating voltage 2.7V – 5.5V

I

400 KHz clock frequency (F) at 2.7V - 5.5V

I

200μA active current typical

10μA standby current typical

1μA standby current typical (L)

0.1μA standby current typical (LZ)

I

IIC compatible interface

– Provides bi-directional data transfer protocol

I

Sixteen byte page write mode

– Minimizes total write time per byte

I

Self timed write cycle

Typical write cycle time of 6ms

I

Hardware Write Protect for upper half (FM24C05U only)

I

Endurance: 1,000,000 data changes

I

Data retention greater than 40 years

I

Packages available: 8-pin DIP, 8-pin SO, and 8-pin TSSOP

I

Available in three temperature ranges

- Commercial: 0° to +70°C

- Extended (E): -40° to +85C

- Automotive (V): -40° to +125°C

Block Diagram

VCC

VSS

WP

H.V. GENERATION

TIMING &CONTROL

START

STOP

LOGIC

CONTROL

LOGIC

SLAVE ADDRESS

REGISTER &

COMPARATOR

E2PROM

ARRAY

SDA

SCL

XDEC

A2

A1

WORD

ADDRESS

COUNTER

R/W

YDEC

CK

DIN

DATA REGISTER

DOUT

? 2000 Fairchild Semiconductor International

FM24C04U/05U Rev. A.3

1

www.fairchildsemi.com

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