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X76F640X-2.7

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Secure SerialFlash

Secure Serial Flash

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Xicor Inc.

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Xicor

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DESCRIPTION

The X76F640 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 two 64-bit passwords. 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.

The X76F640 features a serial interface and software protocol allowing operation on a popular two wire bus. The bus signals are a clock Input (SCL) and a bidirec tional data input and output (SDA). Access to the device is controlled through a chip select (CS) input, allowing any number of devices to share the same bus.

The X76F640 also features a synchronous response to reset providing an automatic output of a hard-wired 32-bit data stream conforming to the industry standard for memory cards.

The X76F640 utilizes Xicor¡¯s proprietary Direct WriteTM cell, providing a minimum endurance of 100,000 cycles and a minimum data retention of 100 years.

FEATURES

? 64-bit Password Security

¡ªFive 64-bit Passwords for Read, Program and Reset

? 8192 Byte+32 Byte Password Protected Arrays

¡ªSeperate Read Passwords

¡ªSeperate Write Passwords

¡ªReset Password

? Programmable Passwords

? Retry Counter Register

¡ªAllows 8 tries before clearing of both arrays

¡ªPassword Protected Reset

? 32-bit Response to Reset (RST Input)

? 32 byte Sector Program

? 400kHz Clock Rate

? 2 wire Serial Interface

? Low Power CMOS

¡ª2.7 to 5.5V operation

¡ªStandby current Less than 1?A

¡ªActive current less than 3 mA

? High Reliability Endurance:

¡ª100,000 Write Cycles

? Data Retention: 100 years

? Available in:

¡ª8 lead SOIC

¡ªSmartCard Module

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    IC MICROSYSTEMS

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    Secure Serial Flash

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