STK18TA8 Datasheet | SIMTEK

.. STK18TA8 nv Time Event Data Recorder Serial Peripheral Interface nv SRAM Quantum Trap TM CMOS Nonvolatile Static RAM Preliminary Features - Data integrity of Simtek nv SRAM bined with Full-Featured Real-Time Clock - 40 MHZ SPI interface with patible mands to industry standards 1 Mbit SPI EEPROMs - STORE to Quantum Trap™ Nonvolatile Elements is Initiated by Software , device pin or Auto Store™ on Power Down - RECALL to SRAM Initiated by Software or Power Restore - Unlimited READ and WRITE and RECALL Cycles - Watchdog Timer - Clock Alarm with programmable Interrupts - Capacitor or battery backup for RTC - Single 3V +20%, -10% Operation - mercial and Industrial Temperatures - High-reliability o Endurance to 1 Million Cycles o Retention to 100 years at 85 ºC - Package: 48-Pin SSOP DESCRIPTION The Simtek STK18TA8 bines a 1 Mbit nonvolatile static RAM and a full-featured real-time clock, in a reliable, monolithic integrated circuit. A Serial Peripheral Interface (SPI) makes system integration simple. The embedded nonvolatile elements TM incorporate Simtek’s Quantum Trap technology producing the world’s most reliable nonvolatile memory. The SRAM provides unlimited read and write cycles, while independent, nonvolatile data resides in TM the highly reliable Quantum Trap cell. Data transfers from the SRAM to the nonvolatile elements (the STORE operation) takes place automatically at power down. On power up, data is restored to the SRAM (the RECALL operation) from the nonvolatile memory. Both the STORE and RECALL operations are also available under software control. 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. VCC VCAP VRTCbat VRTCcap BLOCK DIAGRAM Quantum Trap 1024 X 1024 ROW DECODER STORE STATIC...