KK4428
1К-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
х
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
CP
01
02
03
04
05
Symbol
I/O
CLK
RST
Vcc
GND
Function
Bidirectional data line (open drain )
clock rate input
control input (reset )
supply voltage
general
KODENSHI [ KODENSHI KOREA CORP. ]
