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
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