CAT35C704 Datasheet | Catalyst Semiconductor

Preliminary 4K-Bit Secure Access Serial E2PROM Features s Single 5V 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 mercial, Industrial and Automotive s Operating Frequency: DC- 3MHz s Low Power Consumption: - Active: 3 m A - Standby: 250 µA s 100,000 Program/Erase Cycles s 100 Year Data Retention Temperature Ranges DESCRIPTION The CAT35C704 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 CAT35C704 uses a unique serial-byte synchronous munication 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 MUNICATION 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 Chip Select Serial Data Output Clock Input Serial Data Input Parity Enable Error Indication Pin +5V Power Supply Ground INSTRUCTION REGISTER INSTRUCTION DECODER ADDRESS REGISTER STATUS REGISTER MEMORY POINTER 35C704 F02 Note: (1) DI, DO may be tied together to form a mon I/O. © 1998 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 25045-00 2/98 Preliminary...