BQ2201PN

SRAM控制单元

General Description

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.

Features

➤Power monitoring and switching for 3-volt battery-backup applications

➤Write-protect control

➤3-volt primary cell inputs

➤Less than 10ns chip-enable propagation delay

➤5% or 10% supply operation