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PCA8581

128 × 8-bit EEPROM with I2C-bus interface

Philips Electronics 

Philips Semiconductors

128 × 8-bit EEPROM with I2C-bus interface

Product specification

PCA8581; PCA8581C

1 FEATURES

• Operating supply voltage:

– 4.5 to 5.5 V (PCA8581)

– 2.5 to 6.0 V (PCA8581C)

• Integrated voltage multiplier and timer for writing

(no external components required)

• Automatic erase before write

• Low standby current; maximum 10 µA

• 8-byte page write mode

• Serial input/output bus (I2C-bus)

• Address by 3 hardware address pins

• Automatic word address incrementing

• Designed for minimum 10000 write cycles per byte

• 10 years minimum non-volatile data retention

• Infinite number of read cycles

• Pin and address compatibility to PCF8570C and

PCF8582

• Operating ambient temperature: −25 to +85 °C.

2 GENERAL DESCRIPTION

The PCA8581 and PCA8581C are low power CMOS

EEPROMs with standard and wide operating voltages:

4.5 to 5.5 V (PCA8581)

2.5 to 6.0 V (PCA8581C).

In the following text, the generic term ‘PCA8581’ is used to

refer to both types in all packages except when otherwise

specified.

The PCA8581 is organized as 128 words of 8-bytes.

Addresses and data are transferred serially via a two-line

bidirectional bus (I2C-bus). The built-in word address

register is incremented automatically after each written or

read data byte. All bytes can be read in a single operation.

Up to 8 bytes can be written in one operation, reducing the

total write time per byte. Three address pins, A0, A1 and

A2 are used to define the hardware address, allowing the

use of up to 8 devices connected to the bus without

additional hardware.

3 QUICK REFERENCE DATA

SYMBOL

VDD

IDD

Tamb

Tstg

PARAMETER

supply voltage

PCA8581

PCA8581C

supply current (standby)

operating ambient temperature

storage temperature

CONDITIONS

fSCL = 0 Hz

without EEPROM retention

with EEPROM retention

MIN.

MAX.

UNIT

4.5

5.5

V

2.5

6.0

V

−

10

µA

−25

+85

°C

−65

+150

°C

−65

+85

°C

4 ORDERING INFORMATION

TYPE

NUMBER

PCA8581P

PCA8581CP

PCA8581T

PCA8581CT

NAME

DIP8

DIP8

SO8

SO8

PACKAGE

DESCRIPTION

plastic dual in-line package; 8 leads (300 mil)

plastic dual in-line package; 8 leads (300 mil)

plastic small outline package; 8 leads; body width 3.9 mm

plastic small outline package; 8 leads; body width 3.9 mm

VERSION

SOT97-1

SOT97-1

SOT96-1

SOT96-1

1997 Apr 02

3

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