X76F400

4K X76F400 Secure SerialFlash 512 x 8 bit FEATURES 64-bit password security One array (496 bytes) two passwords (16 bytes) —Read password —Write password Programmable passwords Retry counter register —Allows 8 tries before clearing of the array 32-bit response to reset (RST input) 8 byte sector write mode 1MHz clock rate 2-wire serial interface Low power CMOS —2.5 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, SOIC,TSSOP DESCRIPTION The X76F400 is a password access security supervisor, containing one 3968-bit Secure SerialFlash array. Access to the memory array can be controlled by two 64-bit passwords. These passwords protect read and write operations of the memory array. The X76F400 features a serial interface and software protocol allowing operation on a popular 2-wire bus. The bus signals are a clock input (SCL) and a bi-directional data input and output (SDA). The X76F400 also features a synchronous response to reset, providing an automatic output of a hard-wired 32-bit data stream, thereby meeting the industry standard for memory cards. The X76F400 utilizes Xicor’s proprietary Direct Write™ cell, providing a minimum endurance of 100,000 cycles and a minimum data retention of 100 years. BLOCK DIAGRAM Retry Counter Data Transfer Array Access Enable Interface Logic Password Array and Password Verification Logic RST...