CAT33C704

Preliminary CAT33C704 4K-Bit Secure Access Serial E2PROM FEATURES s Single 3V Supply s Password READ/WRITE Protection: 1 to 8 Bytes s Memory Pointer WRITE Protection s Sequential READ Operation s 256 x16 or 512 x 8 Selectable Serial Memory s High Speed Synchronous Protocol s Operating Frequency: DC–1MHz s Low Power Consumption: Active: 3 mA Standby: 250 µA s 100,000 Program/Erase Cycles s 100 Year Data Retention s Commercial, Industrial and Automotive Temperature Ranges DESCRIPTION The CAT33C704 is a 4K-bit Serial E2PROM that safeguards stored data from unauthorized access by use of a user selectable (1 to 8 byte) access code and a movable memory pointer. Two operating modes provide unprotected and password-protected operation allowing the user to configure the device as anything from a ROM to a fully protected no-access memory. The CAT33C704 uses a unique serial-byte synchronous communication protocol and has a Sequential Read feature where data can be sequentially clocked out of the memory array. The device is available in 8-pin DIP or 16-pin SOIC packages. PIN CONFIGURATION DIP Package (P) CS CLK DI DO 1 2 3 4 8 7 6 5 VCC PE ERR GND BLOCK DIAGRAM SOIC Package (J) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 NC NC VCC PE ERR GND NC NC 5074 FHD F01 NC NC CS CLK DI DO NC NC VCC GND 64-BIT ACCESS CODE & CONTROL BLOCK SERIAL COMMUNICATION BLOCK DO CLK PE CS DI 4K-BIT EEPROM ARRAY R/W BUFFER ADDRESS DECODER PIN FUNCTIONS Pin Name CS DO(1) CLK DI(1) PE ERR VCC GND Function ...