Single-Piece 1Mb Nonvolatile SRAM

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The DS2045 is a 1Mb reflowable nonvolatile (NV) SRAM, which consists of a static RAM (SRAM), an NV controller, and an internal rechargeable manganese lithium (ML) battery. These components are encased in a surface-mount module with a 256-ball BGA footprint. Whenever VCC is applied to the module, it recharges the ML battery, powers the SRAM from the external power source, and allows the contents of the SRAM to be modified. When VCC is powered down or out of tolerance, the controller write-protects the SRAM's contents and powers the SRAM from the battery. Two versions of the DS2045 are available, which provide either a 5% or 10% power-monitoring trip point. The DS2045 also contains a power-supply monitor output, active-low RST, which can be used as a CPU supervisor for a microprocessor.

Key Features

  • Single-Piece, Reflowable, 27mm x 27mm BGA Package Footprint
  • Internal ML Battery and Charger
  • Unconditionally Write-Protects SRAM when VCC is Out-of-Tolerance
  • Automatically Switches to Battery Supply when VCC Power Failures Occur
  • Internal Power-Supply Monitor Detects Power Fail at 5% or 10% Below Nominal VCC (5V)
  • Reset Output can be used as a CPU Supervisor for a Microprocessor
  • Industrial Temperature Range (-40°C to +85°C)


  • Data Acquisition Systems
  • Fire Alarms
  • Gaming
  • Industrial Controllers
  • PLC
  • POS Terminals
  • RAID Systems and Servers
  • Router/Switches

Technical Documents

App Note 3693 Why Maxim Chose to Design the Single-Piece NV SRAM Modules

Quality and Environmental Data

Product Reliability Reports: DS2045AB.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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