Panasonic MN63154 Datasheet

IC Card EEPROMs

MN63154

EEPROM for IC Cards

Overview

The MN63154 is an EEPROM for use in IC cards. It
features security features and an address specification
system using opcode input.

Low cost combined with high security makes the chips
ideal for use in prepaid cards and other types of IC cards.

Features

Easy-to-use control system

• Address specif ication system using opcode input ov er
a 3-wire interface (CLK, I/O, and RST)

• Automatic erasing and writing using a single 5 volt
power supply

Flexible memory-layout

The memory is divided into 11 areas. Six areas
containing 500 bytes are freely usable.

Advanced security features

• Verification of IC card authenticity
The IC passes entered data through a random

number generator circuit on its way to output to
provide a check of card validity.

• Protection against malicious experimentation
Four or more unsuccessful attempts to access the

IC card render it permanently unusable.

• Protection of individual memory areas on the card
Read or write access to a memory area requires

matches for both security and condition codes.
There is also a condition code for permanently
disabling re-write.

• Mixed configuration of EPROM and EEPROM
Individual areas consist of EPROM or EEPROM.

High reliability

• Write cycles: 10,000 times

• Data storage interval: 10 years

Pad Assignment

GND

I/O

Note: This product is sold as wafers.

1

2

(TOP VIEW)

5

4

3

V

DD

RST

CLK

Applications

IC cards

1

MN63154 IC Card EEPROMs

Block Diagram

GND

CLK

1

3

Memory
256 × 16

Data register

Random
number generator

Address
decoder

I/O buffer

Mode decode-logic

5

V

DD

2

I/O

4

RST

2