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DS2065W Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS2065W Datasheet(HTML) 1 Page - Maxim Integrated Products |
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General Description The DS2065W is a 8Mb 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 mod- ified. 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 DS2065W also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor. Applications RAID Systems and Servers POS Terminals Industrial Controllers Routers/Switches Data-Acquisition Systems Fire Alarms Gaming PLC Features ♦ Single-Piece, Reflowable, 27mm2 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 DS2065W 3.3V Single-Piece 8Mb Nonvolatile SRAM ______________________________________________ Maxim Integrated Products 1 Rev 0; 1/05 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Ordering Information Pin Configuration appears at end of data sheet. PART TEMP RANGE PIN-PACKAGE SPEED (ns) SUPPLY TOLERANCE (%) DS2065W-100 -40°C to +85°C 256 Ball 27mm2 BGA Module 100 3.3V ±0.3V Typical Operating Circuit (CE) DATA ADDRESS (INT) RST A0–19 DQ0–7 CE 20 BITS 8 BITS MICROPROCESSOR OR DSP DS2065W 1024k x 8 NV SRAM (WR) WE (RD) OE |
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