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DESCRIPTION

The X76F641 is a Password Access Security Supervisor, containing one 65536-bit Secure SerialFlash array and one 256-bit Secure SerialFlash array. Access to each memory array is controlled by five 64-bit passwords each. These passwords protect read and write operations of the memory array. A separate RESET password is used to reset the passwords and clear the memory arrays in the event the read and write passwords are lost.

FEATURES

? 64-bit Password Security

—Five 64-bit Passwords for Read, Program and Reset

? 8192 Byte+32 Byte Password Protected Arrays

—Seperate Read Passwords

—Seperate Write Passwords

—Reset Password

? Programmable Passwords

? Retry Counter Register

—Allows 8 tries before clearing of both arrays

—Password Protected Reset

? 32-bit Response to Reset (RST Input)

? 32 byte Sector Program

? 400kHz Clock Rate

? 2 wire Serial Interface

? Low Power CMOS

—2.0 to 5.5V operation

—Standby current Less than 1μA

—Active current less than 3 mA

? High Reliability Endurance:

—100,000 Write Cycles

? Data Retention: 100 years

? Available in:

—8 lead EIAJ SOIC

—SmartCard Module