DS1248WP-120+

The DS1248 1024k NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 128k words by 8 bits) with a built-in real-time clock.
The DS1248 has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and writes protection is unconditionally enabled to prevent garbled data in both the memory and real-time clock.
FEATURES● Real-time clock (RTC) keeps track of hundredths of seconds, minutes, hours, days, date of the month, months, and years● 128k x 8 NV SRAM directly replaces volatile static RAM or EEPROM● Embedded lithium energy cell maintains calendar operation and retains RAM data● Watch function is transparent to RAM operation● Month and year determine the number of days in each month; valid up to 2100● Full 10% operating range● Operating temperature range: 0C to +70C● Over 10 years of data retention in the absence of power● Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time● DIP Module only● Standard 32-pin JEDEC pinout● PowerCap® Module Board only● Surface mountable package for direct connection to PowerCap containing battery and crystal● Replaceable battery (PowerCap)● Pin for pin compatible with DS1244P and DS1251P