DESCRIPTION
●The DS1220AB and DS1220AD 16k Nonvolatile SRAMs are 16,384-bit, fully static, nonvolatile SRAMs
●organized as 2048 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and
●control circuitry which constantly monitors VCCfor an out-of-tolerance condition. When such a condition.
●FEATURES
●10 years minimum data retention in the absence of external power
●Data is automatically protected during power loss
●Directly replaces 2k x 8 volatile static RAM or EEPROM
●Unlimited write cycles
●Low-power CMOS
●JEDEC standard 24-pin DIP package
●Read and write access times as fast as 100 ns
●Lithium energy source is electrically
●disconnected to retain freshness until power is applied for the first time
●Full ±10% VCCoperating range (DS1220AD)
●Optional ±5% VCCoperating range (DS1220AB)
●Optional industrial temperature range of -40°C to +85°C, designated IND
