BL7448S
Intelligent 8-Kbit EEPROM
Description
BL7448S is manufactured using 0.35um
CMOS and EEPROM technology. It contains
1024×8 bit EEPROM offering the possibility
of programmable write protection for each
byte and Programmable Security Code (PSC)
Verification logic. BL7448S is applied in IC
cards.
Features
・
1024×8 bit EEPROM organization
・
Byte-wise addressing
・
Irreversible byte-wise write protection
・
1024×1 bit protection memory organization
・
Serial three-write bus
・
End of programming indicated on data output
・
Minimum of 10
5
write/erase cycles
・
Data retention for minimum of ten years
・
Contact configuration and serial interface in accordance to
ISO standard 7816 (synchronous transmission)
・
Data can only be changed after entry of the correct
2-byte programmable security code(PSC)
・
Application Function Block Diagram
Pin Assignment
Vcc C
1
RST C
2
CLK C
3
N.C. C
4
C
GND
5
NC C
6
I/O C
7
N.C.
8
C
Control
Logic
EEPROM
ddress: No.810, YiShan Road ShangHai China Tel:86-021-64850700 Fax:86-64852222 Zip.200233