Maker : Maxim Integrated Products
Part No. : DS2030W

  Datasheet PDF : DS2030W.pdf
  Cross Reference : DS2030W Cross Reference
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Product Information

Rev 0; 10/04 www.DataSheet4U.com DS2030W 3.3V Single-Piece 256k Nonvolatile SRAM General Description The DS2030W is a 256kb 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. The DS2030W also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor. 27mm2 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 DS2030W 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. Ordering Information PART DS2030W-100 TEMP RANGE -40°C to +85°C PIN-PACKAGE 256 Ball 27mm2 BGA Module SPEED (ns) 100 SUPPLY TOLERANCE (%) 3.3V ±0.3V Typical Operating Circuit FROM EXTERNAL DECODE LOGIC P3.6 P3.7 PSEN (WR) (RD) AND OE DQ0–7 CE WE DS2030W 32k x 8 NV SRAM 8051 MICROPROCESSOR P0.0–7 ALE P2.0–6 (INT3) 8 BITS SN74AC573 LATCH D0–7 Q0–7 LE 7 BITS 8 BITS A0–7 A8–14 P1.5 RST ______________________________________________ Maxim Integrated Products 1 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. www.DataSheet4U.com DS2030W 3.3V Single-Piece 256k Nonvolatile SRAM DS2030W ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground .................-0.3V to +4.6V Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range ...............................-40°C to +85°C Soldering Temperature...................See IPC/JEDEC J-STD-020C 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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (TA = -40°C to +85°C) PARAMETER Supply Voltage Input Logic 1 Input Logic 0 SYMBOL VCC VIH VIL CONDITIONS MIN 3.0 2.2 0 TYP 3.3 MAX 3.6 VCC 0.4 UNITS V V V DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±0.3V, TA = -40°C to +85°C.) PARAMETER Input Leakage Current I/O Leakage Current Output-Current High Output-Current Low Output-Current Low RST Standby Current Operating Current Write Protection Voltage SYMBOL IIL IIO IOH IOL IOL RST ICCS1 ICCS2 ICCO1 VTP CE = VCC At 2.4V At 0.4V At 0.4V (Note 1) CE = 2.2V CE = VCC - 0.2V tRC = 200ns, outputs open 2.8 2.9 CONDITIONS MIN -1.0 -1.0 -1.0 2.0 10.0 0.5 0.2 7 5 50 3.0 TYP MAX +1.0 +1.0 UNITS µA µA mA mA mA mA mA V CAPACITANCE (TA = +25°C) PARAMETER Input Capacitance Input/Output Capacitance SYMBOL CIN COUT Not tested Not tested CONDITIONS MIN TYP 7 7 MAX UNITS pF pF 2 _____________________________________________________________________ www.DataSheet4U.com DS2030W 3.3V Single-Piece 256k Nonvolatile SRAM AC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±0.3V, TA = -40°C to +85°C.) PARAMETER Read Cycle Time Access Time OE t...

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