DESCRIPTION
The DS1213D SmartSocket is a 32-pin, 600 mil DIP socket with a built-in CMOS controller circuit and an embedded lithium energy source. It accepts 32K x 8 or 128K x 8 JEDEC bytewide CMOS static RAM. When the socket is mated with a CMOS RAM, it provides a complete solution to problems associated with memory volatility. The SmartSocket monitors incoming 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 data corruption. Using the SmartSocket saves printed circuit board space since the SRAM/SmartSocket combination occupies no more area than the SRAM alone. The SmartSocket uses only Pins 22, 30 and 32 for RAM control. All other pins are passed straight through.

FEATURES
■ Accepts standard 32K x 8 or 128K x 8 CMOS static RAMs
■ Embedded lithium energy cell retains RAM data
■ Self-contained circuitry safeguards data
■ Data retention time is greater than 10 years with the proper RAM selection
■ IC socket permits upgrading from 32K x 8 to 128K x 8 RAM
■ Proven gas-tight socket contacts
■ Operating temperature range 0°C to 70°C