STK17T88

• Data Integrity of Simtek nvSRAM Combined with Full-Featured Real-Time Clock o Low Power, 300 nA Max, RTC current o Capacitor or battery backup for RTC
• Watchdog Timer
• Clock Alarm with programmable Interrupts
• 25ns, 35ns and 45ns Access Times
• "Hands-off" Automatic STORE on Power Down with only a small capacitor
• STORE to QuantumTrap™ Initiated by Software , device pin, or on Power Down
• RECALL to SRAM Initiated by Software or Power Up
• Unlimited READ, WRITE and RECALL Cycles
• High-reliability o Endurance to 1 Million Cycles o Retention to 100 years at 125 ºC
• 5mA Typical ICC at 200ns Cycle Time
• Single 3V +20%, -10% Operation
• SSOP and DIP Packages, (ROHS compliant)

Power Supply Voltage......................................-0.5V to +4.1V
Voltage on Input Relative to V_SS...........-0.5V to (V_CC + 0.5V)
Voltage on Outputs...............................-0.5V to (V_CC + 0.5V)
Temperature under Bias...............................55°C to 125°C
Junction Temperature ..................................55°C to 140°C
Storage Temperature...................................65°C to 150°C
Power Dissipation............................................................1W
DC Output Current (1 output at a time, 1s duration)...15mA

The Simtek STK17T88 combines a 256 Kbit nonvolatile static RAM with a full-featured real-time clock in a reliable, monolithic integrated circuit. The embedded nonvolatile elements incorporate Simtek's QuantumTrap™ technology producing the world's most reliable nonvolatile memory. The SRAM can be read and written an unlimited number of times, while independent, nonvolatile data resides in the nonvolatile elements.

The Real-Time Clock function provides an accurate clock with leap year tracking and a programmable, high accuracy oscillator. The Alarm function is programmable for one-time alarms or periodic seconds, minutes, hours, or days. There is also a programmable Watchdog Timer for process control.