BQ2204A - 用于 4 SRAM 内存组的 SRAM 非易失性控制器 IC

BQ2204A是TI德州仪器公司的一款NVSRAM（非易失性SRAM）产品，BQ2204A是用于 4 SRAM 内存组的 SRAM 非易失性控制器 IC，本站介绍了BQ2204A的封装应用图解、特点和优点、功能等，并给出了与BQ2204A相关的TI元器件型号供参考。

BQ2204A - 用于 4 SRAM 内存组的 SRAM 非易失性控制器 IC - NVSRAM（非易失性SRAM） - 电源管理特殊功能 - 德州仪器

产品描述

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.

产品特性

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

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