DESCRIPTION
The Simtek STK10C48 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 the Nonvolatile Elements. Data may easily be transferred from the SRAM to the Nonvolatile Elements (the STORE operation), or from the Nonvolatile Elements to the SRAM (the RECALL operation), using the NE pin. Transfers from the Nonvolatile Elements to the SRAM (the RECALL operation) also take place automatically on restoration of power. The STK10C48combines the high performance and ease of use of a fast SRAM with nonvolatile data integrity.
The STK10C48 features industry-standard pinout for nonvolatile RAMs.

FEATURES
*25ns, 35ns and 45ns Access Times
*STORE to Nonvolatile Elements Initiated by Hardware
*RECALL to SRAM Initiated by Hardware or Power Restore
*Automatic STORE Timing
*10mA Typical ICC at 200ns Cycle Time
*Unlimited READ, WRITE and RECALL Cycles
*1,000,000 STORE Cycles to Nonvolatile Elements
*100-Year Data Retention over Full Industrial Temperature Range
*Commercial and Industrial Temperatures
*28-Pin 300 mil PDIP, 300 mil SOIC and 350 mil SOIC Packages

STK10C48-PF25I, STK10C48-NF25I, STK10C48-SF25I, STK10C48-P25I

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DESCRIPTION
The Simtek STK10C68 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 Nonvolatile Elements. Data may easily be transferred from the SRAM to the Nonvolatile Elements (the STORE operation), or from the Nonvolatile Elements to the SRAM(the RECALL operation), using the NE pin. Transfers from the Nonvolatile Elements to the SRAM (the RECALL operation) also take place automatically on restoration of power. The STK10C68 combines the high performance and ease of use of a fast SRAM with nonvolatile data integrity.
The STK10C68 features industry-standard pinout for nonvolatile RAMs. MIL-STD-883 and Standard Military Drawing (SMD #5962-93056) devices are available.

FEATURES
*25ns, 35ns, 45ns and 55ns Access Times
*STORE to Nonvolatile Elements Initiated by Hardware
*RECALL to SRAM Initiated by Hardware or Power Restore
*Automatic STORE Timing
*10mA Typical ICC at 200ns Cycle Time
*Unlimited READ, WRITE and RECALL Cycles
*1,000,000 STORE Cycles to Nonvolatile Elements (Industrial/Commercial)
*100-Year Data Retention (Industrial/Commercial)
*Commercial, Industrial and Military Temperatures
*28-Pin DIP, SOIC and LCC Packages

STK10C68-5PF25M, STK10C68-PF25M, STK10C68-5SF25M, STK10C68-SF25M

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DESCRIPTION
The STK25C48 is a fast SRAM 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 the Nonvolatile Elements. Data transfers from the SRAM to the Nonvolatile Elements (the STORE operation) can take place automatically on power down using charge stored in system capacitance. Transfers from the Nonvolatile Elements to the SRAM (the RECALL operation) take place automatically on restoration of power. The nvSRAM can be used in place of existing 2K x 8 SRAMs and also matches the pinout of 2K x 8 battery-backed SRAMs, EPROMs and EEPROMs, allowing direct substitution while enhancing performance. No support circuitry is required for microprocessor interfacing.

FEATURES
*Nonvolatile Storage without Battery Problems
*Directly Replaces 2K x 8 Static RAM, Battery- Backed RAM or EEPROMs
*25ns, 35ns and 45ns Access Times
*STORE to Nonvolatile Elements Initiated by AutoStore™ on Power Down
*RECALL to SRAM Initiated by Power Restore
*10mA Typical ICC at 200ns Cycle Time
*Unlimited READ, WRITE and RECALL Cycles
*1,000,000 STORE Cycles to Nonvolatile Elements
*100-Year Data Retention over Full Industrial Temperature Range
*Commercial and Industrial Temperatures
*24-Pin 600 PDIP Package

STK22C48-WF25I, STK22C48-W25I, STK22C48-WF45I, STK22C48-W45I

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General Description
The DS2045 is a 1Mb reflowable nonvolatile (NV) SRAM, which consists of a static RAM (SRAM), an NV controller, and an internal rechargeable manganese lithium (ML) battery. These components are encased in a surface-mount module with a 256-ball BGA footprint. Whenever VCC is applied to the module, it recharges the ML battery, powers the SRAM from the external power source, and allows the contents of the SRAM to be modified. When VCC is powered down or out of tolerance, the controller write-protects the SRAM’s contents and powers the SRAM from the battery. Two versions of the DS2045 are available, which provide either a 5% or 10% power-monitoring trip point. The DS2045 also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor.

Features
*Single-Piece, Reflowable, 27mm2 PBGA Package Footprint
*Internal ML Battery and Charger
*Unconditionally Write-Protects SRAM when VCC is Out-of-Tolerance
*Automatically Switches to Battery Supply when VCC Power Failures Occur
*Internal Power-Supply Monitor Detects Power Fail at 5% or 10% Below Nominal VCC (5V)
*Reset Output can be used as a CPU Supervisor for a Microprocessor
*Industrial Temperature Range (-40°C to +85°C)
*UL Recognized

Applications
*RAID Systems and Servers
*Industrial Controllers
*Gaming
*Router/Switches
*POS Terminals
*Data-Acquisition Systems
*Fire Alarms
*PLC

DS2045AB-70, DS2045AB-100, DS2045Y-70, DS2045Y-100

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DESCRIPTION
The Simtek STK16CA8 is a fast static RAM with a nonvolatile element in each static memory cell. The embedded nonvolatile elements incorporate Simtek’s QuantumTrap™ technology producing the world’s most reliable nonvolatile memory. The SRAM provides unlimited read and write cycles, while independent, nonvolatile data resides in the nonvolatile elements. Data transfers from the SRAM to the nonvolatile elements (the STORE operation) can take place automatically on power down or under software control. An internal capacitor guarantees the STORE operation, even under extreme power-down slew rates 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 controlled by entering control sequences on the SRAM inputs. The STK16CA8 is pin-compatible with 128k x 8 SRAMs and batterybacked SRAMs, allowing direct substitution while providing superior performance.

FEATURES
*25ns, 35ns and 45ns Access Times
*Directly Replaces 128K x 8 Static RAM, Battery-Backed RAM or EEPROM
*Transparent Data Save on Power Down
*STORE to QuantumTrap™ Nonvolatile Elements is Initiated by Software or AutoStore-Plus™on Power Down
*RECALL to SRAM Initiated by Software or Power Restore
*5mA Typical ICC at 200ns Cycle Time
*Unlimited READ and WRITE Cycles to SRAM
*100-Year Data Retention to Quantum Trap
*Single 3V +20%, -10% Operation
*Commercial and Industrial Temperatures
*32-Pin DIP Package

STK16CA8-WF45I, STK16CA8-W45I, STK16CA8-WF35I, STK16CA8-W35I

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General Description
 The DS3030W consists of a static RAM, a nonvolatile (NV) controller, a year 2000-compliant real-time clock (RTC), and an internal rechargeable manganese lithium (ML) battery.
These components are encased in a surface- mount module with a 256-ball BGA footprint.
Whenever VCC is applied to the module, it recharges the ML battery, powers the clock and SRAM from the external power source, and allows the contents of the clock registers or SRAM to be modified.
When VCC is powered down or out-of-tolerance, the controller writeprotects the memory contents and powers the clock and SRAM from the battery.
The DS3030W also contains a power-supply monitor output (RST), as well as a user-programmable interrupt output (IRQ/FT).

Features
* Single-Piece, Reflowable, 27mm x 27mm BGA Package Footprint
* Internal Manganese Lithium Battery and Charger
* Integrated Real-Time Clock
* Unconditionally Write-Protects the Clock and SRAM when VCC is Out-of-Tolerance
* Automatically Switches to Battery Supply when VCC Power Failures Occur
* Reset Output can be Used as a CPU Supervisor
* Interrupt Output can be Used as a CPU Watchdog Timer
* Industrial Temperature Range (-40°C to +85°C)
* UL Recognized

Applications
* RAID Systems and Servers
* Gaming
* POS Terminals
* Fire Alarms
* Industrial Controllers
* PLCs
* Data-Acquisition Systems
* Routers/Switches

DS3030W-100

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