SRAM NV Controller With Reset

The CMOS BQ2202 SRAM Nonvolatile Controller With Reset provides all the necessary functions for converting one or two banks of standard CMOS SRAM into nonvolatile read/write memory. A precision Comparator monitors the 5V VCC input for an out-of-tolerance condition. When out-of-tolerance is detected, the two conditioned chip-enable outputs are forced inac- tive to write-protect both banks of SRAM Power for the external SRAMs is switched from the VCC supply to the battery-backup supply as VCC de- cays. On a subsequent power--up, the VOUT supply is automatically switched from the backup supply to the VCC supply. The external SRAMs are write-protected until a power- valid condition exists. The reset out- put provides power-fail and power-on resets for the system. During power-valid operation, the input decoder selects one of two banks of SRAM By Texas Instruments
BQ2202 's PackagesBQ2202 's pdf datasheet

BQ2202 Pinout, Pinouts
BQ2202 pinout,Pin out
This is one package pinout of BQ2202,If you need more pinouts please download BQ2202's pdf datasheet.

BQ2202 Application circuits
BQ2202 circuits
This is one application circuit of BQ2202,If you need more circuits,please download BQ2202's pdf datasheet.

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