BQ2205 Series
Battery back-up supervisor for dual SRAM banks
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Battery back-up supervisor for dual SRAM banks
| Part | Package / Case [x] | Package / Case | Package / Case [x] | Mounting Type | Controller Type | Supplier Device Package | Operating Temperature [Max] | Operating Temperature [Min] | Voltage - Supply [Max] | Voltage - Supply [Min] |
|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ2205LYPWR | 0.173 " | 16-TSSOP | 4.4 mm | Surface Mount | Nonvolatile SRAM | 16-TSSOP | 70 ░C | -20 ░C | 3.6 V | 3 V |
Texas Instruments BQ2205LYPWRG4 | 0.173 " | 16-TSSOP | 4.4 mm | Surface Mount | Nonvolatile SRAM | 16-TSSOP | 70 ░C | -20 ░C | 3.6 V | 3 V |
Texas Instruments BQ2205LYPW | 0.173 " | 16-TSSOP | 4.4 mm | Surface Mount | Nonvolatile SRAM | 16-TSSOP | 70 ░C | -20 ░C | 3.6 V | 3 V |
Key Features
• Power Monitoring and Switching for Non-Volatile Control of SRAMsInput Decoder Allows Control of 1 or 2 Banks of SRAMWrite-Protect Control3-V Primary Cell Input3.3-V OperationReset Output for System Power-On ResetLess than 20-ns Chip Enable Propagation DelaySmall 16-Lead TSSOP PackageAPPLICATIONSNVSRAM ModulesPoint-of-Sale SystemsFacsimile, Printers and PhotocopiersInternet AppliancesServersMedical Instrumentation and Industrial ProductsPower Monitoring and Switching for Non-Volatile Control of SRAMsInput Decoder Allows Control of 1 or 2 Banks of SRAMWrite-Protect Control3-V Primary Cell Input3.3-V OperationReset Output for System Power-On ResetLess than 20-ns Chip Enable Propagation DelaySmall 16-Lead TSSOP PackageAPPLICATIONSNVSRAM ModulesPoint-of-Sale SystemsFacsimile, Printers and PhotocopiersInternet AppliancesServersMedical Instrumentation and Industrial Products
Description
AI
The CMOS bq2205 SRAM non-volatile controller with reset provides all the necessary functions for converting one or two banks of standard CMOS SRAM into non-volatile read/write memory.
A precision comparator monitors the 3.3-V VCC input for an out-of-tolerance condition. When out-of-tolerance is detected, the two conditioned chip-enable outputs are forced inactive to write-protect both banks of SRAM.
Power for the external SRAMs, VOUT, is switched from the VCC supply to the battery-backup supply as VCC decays. 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 output provides power-fail and power-on resets for the system. During power-valid operation, the input decoder, A, selects one of two banks of SRAM.
The CMOS bq2205 SRAM non-volatile controller with reset provides all the necessary functions for converting one or two banks of standard CMOS SRAM into non-volatile read/write memory.
A precision comparator monitors the 3.3-V VCC input for an out-of-tolerance condition. When out-of-tolerance is detected, the two conditioned chip-enable outputs are forced inactive to write-protect both banks of SRAM.
Power for the external SRAMs, VOUT, is switched from the VCC supply to the battery-backup supply as VCC decays. 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 output provides power-fail and power-on resets for the system. During power-valid operation, the input decoder, A, selects one of two banks of SRAM.