[Simtek]

DESCRIPTION

The Simtek STK1744 DIP module houses 256Kb of nonvolatile static RAM, a real-time clock (RTC) with crystal and a high-value capacitor to support systems that require high reliability and ease of manufacturing. READ and WRITE access to all RTC functions and the memory is the same as a conventional x 8 SRAM. The highest eight addresses of the RAM support clock registers for centuries, years, months, dates, days, hours, minutes and seconds.

FEATURES

• Data Integrity of Simtek nvSRAM Combined with Full-Featured Real-Time Clock

• Stand-Alone Nonvolatile Memory and TimeKeeping Solution—No Other Parts Required

• No Batteries to Fail

• Fast 25ns, 35ns and 45ns Access Times

• Software- and AutoStore™-Controlled Nonvolatile Cycles

• Year 2000 Compliant with Leap Year Compensation

• 24-Hour BCD Format

• 100-Year Data Retention over Full Industrial Temperature Range

• Full 30-Day RTC Operation on Each Power Loss

• Single 5V ± 10 Power Supply