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SRAM Nonvolatile Controller IC for 4 SRAM Banks


Package | PIN: D | 16
Temp: C (0 to 70)
Carrier: Partial Tube
Qty Price
1-9 $7.80
10-24 $7.02
25-99 $6.56
100-249 $5.88
250-499 $5.49
500-749 $4.77
750-999 $4.13
1000+ $4.05


  • Power monitoring and switching for 3-volt battery-backup applications
  • Write-protect control
  • 2-input decoder for control of up to 4 banks of SRAM
  • 3-volt primary cell inputs
  • Less than 10ns chip-enable propagation delay
  • 5% or 10% supply operation

Texas Instruments  BQ2204ASN

The CMOS bq2204A SRAM Non-volatile Controller Unit provides all necessary functions for converting up to four banks of standard CMOS SRAM into nonvolatile read/write memory.

A precision comparator monitors the 5V VCC input for an out-of-tolerance condi-tion. When out-of-tolerance is detected, the four conditioned chip-enable outputs are forced inactive to write-protect up to four banks of SRAM.

During a power failure, the external SRAMs are switched from the VCC supply to one of two 3V backup sup-plies. On a subsequent power-up, the SRAMs are write-protected until a power-valid condition exists.

During power-valid operation, a two-input decoder transparently selects one of up to four banks of SRAM.