Fairchild Semiconductor FM24C256N Datasheet

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FM24C256 rev. B.3

FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect

June 2000

© 2000 Fairchild Semiconductor International

FM24C256
256 KBit 2-Wire Bus Interface
Serial EEPROM with Write Protect

General Description

The FM24C256/C256L/C256LZ devices are 256 Kbits CMOS
nonvolatile electrically erasable memory. These devices offer the
designer different low voltage and low power options. They
conform to all requirements in the Extended IIC 2-wire protocol.
Furthermore, they are designed to minimize device pin count and
simplify PC board layout requirements.

The entire memory array can be write disabled (Write Protection)
by connecting the WP pin to VCC.

Functional address lines allow up to eight devices on the same
bus, for up to a total of 2 Mbit address space.

The IIC communication 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).

Fairchild EEPROMs are designed and tested for applications
requiring high endurance, high reliability, and low power con­sumption.

Block Diagram

Features

■ Extended Operating Voltages
— C256: 4.5V - 5.5V
— C256L: 2.7V - 5.5V
— C256LZ: 2.7V - 5.5V

■ Low Power CMOS
— 1mA active current typical
— C256/C256L: 10µA standby current typical
— C256LZ: less than 1µA standby current

■ 2-wire IIC serial interface

■ 64 byte page write mode

■ Max write cycle time of 6ms byte/page

■ 40 years data retention

■ Endurance: 100,000 data changes

■ Hardware write protect for entire array

■ Schmitt trigger inputs for noise suppression

■ Electrostatic discharge protection > 4000V

■ 8-pin DIP and 8-pin SO (150 mil) packages. Contact factory

for CSP package availability

DS800023-1

H.V. GENERATION

TIMING &CONTROL

E2PROM

ARRAY

YDEC

DATA REGISTER

XDEC

CONTROL

LOGIC

WORD
ADDRESS
COUNTER

SLAVE ADDRESS

REGISTER &

COMPARATOR

START

STOP

LOGIC

WRITE

LOCKOUT

START CYCLE

CK

D

IN

R/W

LOAD INC

SDA

SCL

WP

V

CC

D

OUT

A2
A1
A0

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FM24C256 rev. B.3

FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect

Connection Diagram

Dual-In-Line Package (N)

and 8-Pin SO Package (M8)

Top View

See Package Number N08E and M08A

Pin Names

A0, A1, A2 Device Address Input

V

SS

Ground

SDA Data I/O

SCL Clock Input

WP Write Protect

V

CC

Power Supply

A0

A1

A2

V

SS

V

CC

WP

SCL

SDA

8

7

6

5

1

2

3

4

FM24C256

DS800023-2

3

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FM24C256 rev. B.3

FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect

Ordering Information

FM 24 C XX F LZ E YY X Letter Description

Blank Tube
X Tape and Reel

Package N 8-pin DIP

M8 8-pin SO8

Temp. Range Blank 0 to 70°C

E -40 to +85°C

Voltage Operating Range Blank 4.5V to 5.5V

L 2.7V to 5.5V
LZ 2.7V to 5.5V and

<1µA Standby Current

SCL Clock Frequency Blank 100KHz

F 400KHz

Density 256 256K with write protect

C CMOS

Interface 24 IIC - 2 Wire

FM Fairchild Non-Volatile

Memory

Part Number Clock Frequency V

CC

Standby Current

FM24C256YYX 4.5V - 5.5V 10µA typical

FM24C256LYYX 100KHz 2.7V - 5.5V

FM24C256LZYYX 1µA max

FM24C256FYYX 4.5V - 5.5V 10µA typical

FM24C256FLYYX 400KHz 2.7V - 5.5V

FM24C256FLZYYX 1µA max

Part Number Clock Frequency V

CC

Standby Current

FM24C256EYYX 4.5V - 5.5V 10µA typical

FM24C256LEYYX 100KHz 2.7V - 5.5V

FM24C256LZEYYX 1µA max

FM24C256FEYYX 4.5V - 5.5V 10µA typical

FM24C256FLEYYX 400KHz 2.7V - 5.5V

FM24C256FLZEYYX 1µA max

Commercial Temperature Range: 0° to +70°C

Industrial Temperature Range: -40° to +85°C

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FM24C256 rev. B.3

FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect

Absolute Maximum Ratings

Ambient Storage Temperature –65°C to +150°C

All Input or Output Voltages

with Respect to Ground 6.5V to –0.3V

Lead Temperature

(Soldering, 10 seconds) +300°C

ESD Rating 4000V min.

Operating Conditions

Ambient Operating Temperature

FM24C256/L/LZ 0°C to +70°C
FM24C256F/FL/FLZ 0°C to +70°C
FM24C256E/LE/LZE -40°C to +85°C
FM24C256FE/FLE/FLZE -40°C to +85°C

Positive Power Supply

FM24C256/E 4.5V to 5.5V
FM24C256F/FE 4.5V to 5.5V
FM24C256L/LZ 2.7V to 5.5V
FM24C256FL/FLZ 2.7V to 5.5V
FM24C256LE/LZE 2.7V to 5.5V
FM24C256FLE/FLZE 2.7V to 4.5V

Standard VCC (4.5V to 5.5V) DC Electrical Characteristics

Symbol Parameter Test Conditions Limits Units

Min Typ Max

I

CCA

Active Power Supply Current f

SCL

= 100 kHz 0.5 1.0 mA

f

SCL

= 400 kHz

I

SB

Standby Current VIN = GND or V

CC

10 50 µA

I

LI

Input Leakage Current VIN = GND to V

CC

0.1 1 µA

I

LO

Output Leakage Current V

OUT

= GND to V

CC

0.1 1 µA

V

IL

Input Low Voltage –0.3 VCC x 0.3 V

V

IH

Input High Voltage VCC x 0.7 VCC + 0.5 V

V

OL

Output Low Voltage I

OL

= 2.1 mA 0.4 V

Low VCC (2.7V to 5.5V) DC Electrical Characteristics

Symbol Parameter Test Conditions Limits Units

Min Typ Max

I

CCA

Active Power Supply Current f

SCL

= 100 kHz 0.5 1.0 mA

f

SCL

= 400 kHz

I

SB

Standby Current for L VIN = GND or VCC = 4.5V - 5.5V 10 50 µA

(Note 1) VIN = GND or VCC = 2.7V - 4.5V 1 10

Standby Current for LZ VIN = GND or VCC = 4.5V - 5.5V 10 50

VIN = GND or VCC = 2.7V - 4.5V 0.1 1

I

LI

Input Leakage Current VIN = GND to V

CC

0.1 1 µA

I

LO

Output Leakage Current V

OUT

= GND to V

CC

0.1 1 µA

V

IL

Input Low Voltage –0.3 V

CC

x 0.3 V

V

IH

Input High Voltage VCC x 0.7 VCC + 0.5 V

V

OL

Output Low Voltage IOL = 2.1 mA 0.4 V

Capacitance T

A

= +25°C, f = 100/400 KHz, VCC = 5V

Symbol Test Conditions Max Units

C

I/O

Input/Output Capacitance (SDA) V

I/O

= 0V 8 pF

C

IN

Input Capacitance (A0, A1, A2, SCL) VIN = 0V 6 pF

Note 1: Typical values are for TA = 25°C and nominal supply voltage (5V).