KK4428 Datasheet, PDF(1/9 Page) KODENSHI KOREA CORP. – 1К-byte EEPROM microcircuit with function of protection for writing and programmable secret code.

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KK4428 Datasheet, PDF (1/9 Pages) KODENSHI KOREA CORP. – 1К-byte EEPROM microcircuit with function of protection for writing and programmable secret code.

KK4428

1Ð-byte EEPROM microcircuit with function of protection for

writing and programmable secret code.

Microcircuit KK4428 is designed to use in intellectual plastic cards. Sphere of application:

medical insurance, excess control systems, member cards, smart cards.

Features:

1024 x 8 - arrangement of EEPROM;

Byte - directed addressing;

Protection of memory writing;

1024 Ñ 1 bit arrangement of memory protection ;

Response for reset;

Minimum 10000 cycles of erasure / writing ;

Information storage time - 5 years ;

Location of contact pads and serial interface in accordance with ISO 7816 standard;

Data in memory can be changed only after introduction of correct 2-byte programmable

secret code (PSC);

Purpose of IC contact pads

Symbol

I/O

CLK

RST

Vcc

GND

Function

Bidirectional data line (open drain )

clock rate input

control input (reset )

supply voltage

general

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