BL7448SM Intelligent 8K-bit
EEPROM
Description
BL7448SM is an IC Card chip (module) made
by 0.35um CMOS EERPOM process. It has
1024 byte EEPROM with logical encryption
and function.
Figure 1
Features
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1024 x 8 bit EEPROM organization
Byte-wise addressing
Irreversible byte-wise write protection of every Byte
1024 x1 bit organization of protection memory
Serial three-wire link
End of processing indicated at data output
Minimum of 100,000 write/erase cycles
Data retention time :>10 years
Contacts configuration and serial interface according to ISO 7816 standard
(synchronous transmission)
Data can only be changed after entry of the correct 2-byte
Programmable security code
Pin Description
Pin No.
1
2
3
4
5
6
7
8
Parameter
C1
C2
C3
C4
C5
C6
C7
C8
Symbol
V
dd
RST
CLK
N.C.
GND
NC
I/O
NC
Function Description
Supply Voltage
Reset signal
Clock input
Not connected
Ground
Not connected
Bidirectional data line (open drain)
Not connected
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-1-
Total
7 Pages
8/16/2006
BELLING [ SHANGHAI BELLING CO., LTD. ]
