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DS2045W Datasheet Single-piece 1m Nonvolatile Sram

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: Rev 1; 1/05 w The DS2045W 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 ponents 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. The DS2045W also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor. w w .D at h S a t e e 4U . m o c DS2045W 3.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

DS2045W Applications RAID Systems and Servers Industrial Controllers Gaming Router/Switches POS Terminals Data-Acquisition Systems Fire Alarms PLC Pin Configuration appears at end of data sheet.

PART DS2045W-100 TEMP RANGE -40°C to +85°C PIN-PACKAGE 256 Ball 27mm2 BGA Module w 8051 MICROPROCESSOR w w P4.0 P3.6 P3.7 P1.0–7 P4.4 P2.0–7 P3.2 .D (CE0) (WR) (RD) t a S a 8 BITS e h t e U 4 .c m o Ordering Information SPEED (ns) 100 SUPPLY TOLERANCE (%) 3.3V ±0.3V Typical Operating Circuit CE WE OE AD0–AD7 DQ0–7 DS2045W 128k x 8 NV SRAM 8 BITS A0–7 A16 8 BITS (INT0) A8–15 RST w Direct!

at For pricing, delivery, and ordering information, please contact Maxim/Dallas w 1-888-629-4642, or visit Maxim’s website at

Key Features

  • Single-Piece, Reflowable, PBGA 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 Below Nominal VCC (3.3V).
  • Reset Output can be used as a CPU Supervisor for a Microprocessor.
  • Industrial Temperature Range (-40°C to +85°C).
  • UL Recognized 27m.

More Datasheets from Maxim Integrated (now Analog Devices)

Part Number Description
DS2045AB Single-Piece 1M Nonvolatile SRAM
DS2045L Single-Piece 1M Nonvolatile SRAM
DS2045Y Single-Piece 1M Nonvolatile SRAM
DS2030AB Single-Piece 256kb Nonvolatile SRAM
DS2030W 3.3V Single-Piece 256k Nonvolatile SRAM
DS2030Y Single-Piece 256kb Nonvolatile SRAM
DS2070W 3.3V Single Piece 16Mb Nonvolatile SRAM
DS21448DK 3.3V E1/T1/J1 Line Interface Design Kit Daughter Card
DS21600 (DS21600 - DS21604) 3.3V/5V Clock Rate Adapter
DS21602 (DS21600 - DS21604) 3.3V/5V Clock Rate Adapter

DS2045W Distributor