Packaging information
| Package | Pins SOIC (D) | 8 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the BQ2201
- 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
Description for the BQ2201
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 VCC input 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 VCC supply 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.