GENERAL DESCRIPTION

The DS1216 SmartWatch RAM and SmartWatch ROM sockets are 600-mil-wide DIP sockets with a built-in CMOS watch function, an NV RAM controller circuit, and an embedded lithium energy

source. The sockets provide an NV RAM solution for memory sized from 2K x 8 to 512K x 8 with

package sizes from 26 pins to 32 pins. When a socket is mated with a CMOS SRAM, it provides a

complete solution to problems associated with memory volatility and uses a common energy source to maintain time and date.

FEATURES

? Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years

? Converts Standard 2K x 8 Up to 512K x 8 CMOS Static RAMs into Nonvolatile Memory

? Embedded Lithium Energy Cell Maintains Watch Information and Retains RAM Data

? Watch Function is Transparent to RAM Operation

? Automatic Leap Year Compensation Valid Up to 2100

? Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time

? Proven Gas-Tight Socket Contacts

? Full ±10 Operating Range

? Accuracy Better Than ±1 Minute/Month at +25°C