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bq2205LY

Features: · Power Monitoring and Switching for Non-Volatile Control of SRAMs· Input Decoder Allows Control of 1 or 2 Banks of SRAM· Write-Protect Control· 3-V Primary Cell Input· 3.3-V Operation· Reset Output for System Power-On Reset· Less than 20-ns Chip Enable Propagation Delay· Small 16-Lead T...

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SeekIC No. : 004301205 Detail

bq2205LY: Features: · Power Monitoring and Switching for Non-Volatile Control of SRAMs· Input Decoder Allows Control of 1 or 2 Banks of SRAM· Write-Protect Control· 3-V Primary Cell Input· 3.3-V Operation· Re...

bq2205LY Data Sheet

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Part Number:
bq2205LY
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Power Monitoring and Switching for Non-Volatile Control of SRAMs
· Input Decoder Allows Control of 1 or 2 Banks of SRAM
· Write-Protect Control
· 3-V Primary Cell Input
· 3.3-V Operation
· Reset Output for System Power-On Reset
· Less than 20-ns Chip Enable Propagation Delay
· Small 16-Lead TSSOP Package


Application

· NVSRAM Modules
· Point-of-Sale Systems
· Facsimile, Printers and Photocopiers
· Internet Appliances
· Servers
· Medical Instrumentation and Industrial Products


Pinout

Connection Diagram


Specifications

 
bq2205LY
UNIT
Input voltage range VCC, (wrt VSS)
−0.3 to 6.0
V
BCP, (wrt VSS)
−0.3 to 4.5
all other pins, (wrt VSS)
−0.3 to VCC + 0.3
Operating temperature range, TA
−20 to 70
Storage temperature, Tstg
−55 to 125
Temperature under bias, TJbias
−40 to 85
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
300

(2) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.


Description

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 of bq2205LY 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 of bq2205LY is automatically switched from the backup supply of bq2205LY 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.




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