[ArtsChip]

DESCRIPTION
The DS1251 4096K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 512k words by 8 bits) with a built-in real-time clock. The DS1251Y 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 write protection is unconditionally enabled to prevent garbled data in both the memory and real-time clock.

FEATURES
● Real-time clock keeps tracks of hundredths of seconds, minutes, hours, days, date of the month, months, and years
● 512k x 8NV 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
● Over 10 years of data retention in the absence of power
● Full 10% operating range
● 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
    -Upward comparable with the DS1248
● PowerCap ® Module Board only
    -Surface mountable package for direct connection to PowerCap containing battery and crystal
    -Replaceable battery (PowerCap)
    -Pin for pin compatible with other densities of DS124XP phantom clocks