STK14C88

Features:

• 25ns, 35ns and 45ns Access Times
• "Hands-off" Automatic STORE with External
   68µF Capacitor on Power Down
• STORE to nonvolatile elements Initiated by
   Hardware, Software or AutoStore™
• RECALL to SRAM Initiated by Software or
   Power Restore
• 10mA Typical ICC  at 200ns Cycle Time
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to nonvolatile ele-
   ments (Commercial/Industrial)
• 100-Year Data Retention in nonvolatile ele-
    ments (Commercial/Industrial)
• Single 5V + 10% Operation
• Commercial, Industrial and Military Temperatures
• 32-Pin SOIC, DIP and LCC Packages


Pinout




Specifications

Voltage on Input Relative to VSS  . . . . . . . . . .0.6V to (VCC + 0.5V)
Voltage on DQ0-7 or HSB . . . . . . . . . . . . . . . .0.5V to (VCC + 0.5V)
Temperature under Bias. . . . . . . . . . . . . . . . . . . . . 55°C to 125°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Power Dissipation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
DC Output Current (1 output at a time, 1s duration)  . . . . . . . 15mA


Description

The Simtek STK14C88-3 is a fast static RAM with a nonvolatile element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent, nonvolatile data resides in nonvo latile elements. Data transfers from the SRAM to the nonvolatile elements (the STORE operation) can take placeautom atically on power down. A 68µF or larger capacitor tied from VCAP to ground guarantees the  STORE operation, regar dless of power-down slew rate or loss of power from "hot swapping". Transfers from the nonvolatile elements to the SRAM (the RECALL operation) take place automatically on restoration of power. Initiation of STORE and RECALL cycles can also be software controlled by entering specific read sequences. A hardware STORE may be initiated with the HSB pin.