CAT28LV256

256K-Bit CMOS PARALLEL EEPROM CAT28LV256 FEATURES s 3.0V to 3.6V Supply s Read Access Times: 200/250/300 ns s Low Power CMOS Dissipation: – Active: 15 mA Max. – Standby: 150 µA Max. s Simple Write Operation: – On-Chip Address and Data Latches – Self-Timed Write Cycle with Auto-Clear s Fast Write Cycle Time: – 10ms Max. s Commercial, Industrial and Automotive Temperature Ranges s CMOS and TTL Compatible I/O s Automatic Page Write Operation: – 1 to 64 Bytes in 10ms – Page Load Timer s End of Write Detection: – Toggle Bit – DATA Polling s Hardware and Software Write Protection s 100,000 Program/Erase Cycles s 100 Year Data Retention DESCRIPTION The CAT28LV256 is a fast, low power, low voltage CMOS Parallel E2PROM organized as 32K x 8-bits. It requires a simple interface for in-system programming. On-chip address and data latches, self-timed write cycle with auto-clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling and Toggle status bits signal the start and end of the self-timed write cycle. Additionally, the CAT28LV256 features hardware and software write protection. BLOCK DIAGRAM The CAT28LV256 is manufactured using Catalyst’s advanced CMOS floating gate technology. It is designed to endure 100,000 program/erase cycles and has a data retention of 100 years. The device is available in JEDEC– approved 28-pin DIP, 28-pin TSOP or 32-pin PLCC packages. A6–A14 VCC CE OE WE A0–A5 ADDR. BUFFER & LATCHES INADVERTENT WRITE...