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X76F641W Datasheet(PDF) 1 Page - Xicor Inc. |
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X76F641W Datasheet(HTML) 1 Page - Xicor Inc. |
1 / 17 page ©Xicor, Inc. 1994, 1995, 1996 Patents Pending 9900-5004.5 3/9/99 EP 1 Characteristics subject to change without notice 64K X76F641 8Kx8+32x8 Functional Diagram Secure SerialFlash 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 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 opera- tions 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 X76F641 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). The X76F641 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 X76F641 utilizes Xicor’s proprietary Direct WriteTM cell, providing a minimum endurance of 100,000 cycles and a minimum data retention of 100 years. LOGIC SCL SDA RST INTERFACE 8K BYTE DATA TRANSFER ARRAY ACCESS ENABLE RESET RESPONSE REGISTER PASSWORD ARRAY AND PASSWORD VERIFICATION LOGIC RETRY COUNTER SerialFlash ARRAY 32 BYTE SerialFlash ARRAY ARRAY 0 ARRAY 1 (PASSWORD PROTECTED) (PASSWORD PROTECTED) 7025 FM 01 ISO 7816 Compatible |
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