DS2045L

3.3V Single-Piece 1Mb Nonvolatile SRAM

DS2045L: Typical Operating Circuit slide

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Features

Single-Piece, Reflowable, 27mm x 27mm BGA Package Footprint
Internal ML Battery and Charger
Unconditionally Write-Protects SRAM when V_CC is Out-of-Tolerance
Automatically Switches to Battery Supply when V_CC Power Failures Occur
Internal Power-Supply Monitor Detects Power Fail Below Nominal V_CC (3.3V)
Reset Output can be used as a CPU Supervisor for a Microprocessor
Industrial Temperature Range (-40°C to +85°C)

Additional Details

The DS2045L 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 V_CC 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 V_CC is powered down or out-of-tolerance, the controller write-protects the SRAM's contents and powers the SRAM from the battery. The DS2045L also contains a power-supply monitor output, active-low RST, which can be used as a CPU supervisor for a microprocessor.

Applications