PCB2421 datasheet(2/24 Pages) PHILIPS

2 / 24 page

1997 Apr 01

Philips Semiconductors

Preliminary speciﬁcation

1K dual mode serial EEPROM

PCB2421

CONTENTS

FEATURES

GENERAL DESCRIPTION

ORDERING INFORMATION

BLOCK DIAGRAM

PINNING

FUNCTIONAL DESCRIPTION

6.1

Transmit-only mode (DDC1)

6.2

Initialization procedure

6.3

Bidirectional mode (DDC2B, I2C-bus mode)

6.3.1

Bidirectional mode bus characteristics

6.3.2

Bus not busy (A)

6.3.3

Start condition (B)

6.3.4

Stop condition (C)

6.3.5

Data valid (D)

6.3.6

Acknowledge

6.3.7

Slave address

6.4

Write operation

6.4.1

Byte write

6.4.2

Page write

6.5

Acknowledge polling

6.6

Write protection

6.7

Read operation

6.7.1

Current address read

6.7.2

Random read

6.7.3

Sequential read

6.8

Pin description

6.8.1

SDA

6.8.2

SCL

6.8.3

VCLK

6.8.4

6.8.5

Test

6.8.6

n.c.

LIMITING VALUES

DC CHARACTERISTICS

EEPROM CHARACTERISTICS

AC CHARACTERISTICS

APPLICATION INFORMATION

11.1

Diode protection

11.2

Functional compatibility with microchip 24CL21

dual mode EEPROM

PACKAGE OUTLINES

SOLDERING

13.1

Introduction

13.2

DIP

13.2.1

Soldering by dipping or by wave

13.2.2

Repairing soldered joints

13.3

13.3.1

Reflow soldering

13.3.2

Wave soldering

13.3.3

Repairing soldered joints

DEFINITIONS

LIFE SUPPORT APPLICATIONS

PURCHASE OF PHILIPS I2C COMPONENTS

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