Catalog
SRAM Nonvolatile Controller IC for 1 SRAM Bank
Key Features
• Power monitoring and switching for 3-volt battery-backup applicationsWrite-protect control3-volt primary cell inputsLess than 10ns chip-enable propagation delay5% or 10% supply operationPower monitoring and switching for 3-volt battery-backup applicationsWrite-protect control3-volt primary cell inputsLess than 10ns chip-enable propagation delay5% or 10% supply operation
Description
AI
The CMOS bq2201 SRAM Nonvolatile Controller Unit provides all necessary functions for converting a standard CMOS SRAM into nonvolatile read/write memory.
A precision comparator monitors the 5V VCCinput for an out-of-tolerance condition. When out of tolerance is detected, a conditioned chip-enable output is forced inactive to write-protect any standard CMOS SRAM.
During a power failure, the external SRAM is switched from the VCCsupply to one of two 3V backup supplies. On a subsequent power-up, the SRAM is write-protected until a power-valid condition exists.
The bq2201 is footprint- and timing-compatible with industry standards with the added benefit of a chip-enable propagation delay of less than 10ns.
The CMOS bq2201 SRAM Nonvolatile Controller Unit provides all necessary functions for converting a standard CMOS SRAM into nonvolatile read/write memory.
A precision comparator monitors the 5V VCCinput for an out-of-tolerance condition. When out of tolerance is detected, a conditioned chip-enable output is forced inactive to write-protect any standard CMOS SRAM.
During a power failure, the external SRAM is switched from the VCCsupply to one of two 3V backup supplies. On a subsequent power-up, the SRAM is write-protected until a power-valid condition exists.
The bq2201 is footprint- and timing-compatible with industry standards with the added benefit of a chip-enable propagation delay of less than 10ns.
