SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F

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. The SmartWatch ROM sockets use the embedded lithium source to maintain the time and date only. A key feature of the SmartWatch is that the watch function remains transparent to the RAM. The SmartWatch monitors VCC for an out-of-tolerance condition. When such a condition occurs, an internal lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent loss of watch and RAM data.

* 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