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PRODUCT PREVIEW

April 2001

This is preliminary information on a new product now in development. Details are subject to change without notice.

M34A02

2 Kbit Serial SMBus EEPROM for ACR Card Configuration

s

Two Wire SMBus Serial Interface

s

2.7V to 3.6V Single Supply Voltage

s

Hardware Write Control

s

BYTE and PAGE WRITE (up to 16 Bytes)

s

RANDOM and SEQUENTIAL READ Modes

s

Self-Timed Programming Cycle

s

Automatic Address Incrementing

s

Enhanced ESD/Latch-Up Behavior

s

More than 1 Million Erase/Write Cycles

s

More than 40 Year Data Retention

DESCRIPTION

These

electrically

erasable

programmable

memory (EEPROM) devices are organized as

256x8 bits, and operate down to 2.7 V.

These devices are available in Plastic Small

Outline and Thin Shrink Small Outline packages.

These devices are written by the ACR card-issuer,

and

then accessed

in

Read

mode in

the

application, using the ACR Serial Bus protocol.

This is a two wire serial interface that uses a bi-

directional data bus and serial clock. The device

carries a built-in 4-bit Device Type Identifier code

(1011).

The device behaves as a slave in the ACR Serial

Bus

protocol,

with

all

memory

operations

synchronized by the serial clock. Read and Write

operations are initiated by a Start condition,

generated by the bus master. The Start condition

Figure 1. Logic Diagram

AI03794

SDA

VCC

M34A02

WC

SCL

VSS

3

E0-E2

Table 1. Signal Names

E0, E1, E2

Chip Enable

SDA

Serial Data

SCL

Serial Clock

WC

Write Control

Supply Voltage

Ground

SO8 (MN)

150 mil width

TSSOP8 (DW)

169 mil width

8

1

8

1