參數(shù)資料
型號： MN63154
廠商： PANASONIC CORP
元件分類： DRAM
英文描述： EEPROM for IC Cards
中文描述： 256K X 16 3-WIRE SERIAL EEPROM, UUC5
封裝： WAFER-5
文件頁數(shù)： 1/4頁
文件大?。?/td> 32K
代理商： MN63154
1
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 specification system using opcode input over
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
Applications
IC cards
Pad Assignment
(TOP VIEW)
Note: This product is sold as wafers.
1
2
GND
I/O
5
4
3
V
DD
RST
CLK
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