ds2065w Maxim Integrated Products, Inc., ds2065w Datasheet
ds2065w
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ds2065w Summary of contents
Page 1
... When V is powered down or out-of-tolerance, CC 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. RAID Systems and Servers ...
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... DS2065W 3.3V Single-Piece 8Mb Nonvolatile SRAM ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground .................-0.3V to +4.6V Operating Temperature Range ...........................-40°C to +85°C 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 ...
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... Valid to CE and WE Inactive Valid to End of Write Protection CC Fail Detect to RST Active V CC Valid to RST Inactive V CC DATA RETENTION (T = +25°C.) A PARAMETER Expected Data-Retention Time (Per Charge) DS2065W 3.3V Single-Piece 8Mb SYMBOL CONDITIONS ACC (Note 2) COE t OD (Note 2) t ...
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... DS2065W 3.3V Single-Piece 8Mb Nonvolatile SRAM ADDRESSES OUT (SEE NOTE 9.) 4 _____________________________________________________________________ ACC COE t COE V OH OUTPUT DATA VALID V OL Read Cycle ...
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... ADDRESSES OUT D IN (SEE NOTES 10–13.) ADDRESSES OUT D IN (SEE NOTES 10–13.) DS2065W 3.3V Single-Piece 8Mb ODW HIGH IMPEDANCE DATA IN STABLE ...
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... Note 13 low or the WE low transition occurs prior to or simultaneously with the CE low transition, the output buffers remain in a high-impedance state during this period. Note 14: DS2065W BGA modules are recognized by Underwriters Laboratory (UL) under file E99151. 6 _____________________________________________________________________ ...
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... BAT CHRG 0.5 0 -0.5 -1.0 -40 - TEMPERATURE (°C) DQ OUTPUT-VOLTAGE LOW vs. DQ OUTPUT-CURRENT LOW 0 3.3V CC 0.3 0.2 0 (mA) OL DS2065W 3.3V Single-Piece 8Mb Typical Operating Characteristics SUPPLY CURRENT vs. SUPPLY VOLTAGE 200 3.3V CC 190 BAT CHRG 180 170 160 150 140 3.6 3.0 3.1 3.2 3.3 3 vs. TEMPERATURE TP 3 ...
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... DS2065W 3.3V Single-Piece 8Mb Nonvolatile SRAM BALLS NAME A1, A2, A3, A4 GND Ground B1, B2, B3, B4 N.C. No Connection C1, C2, C3, C4 A15 Address Input 15 D1, D2, D3, D4 A16 Address Input 16 RST E1, E2, E3, E4 Open-Drain Reset Output F1, F2, F3 Supply Voltage CC WE G1, G2, G3, G4 Write-Enable Input OE H1, H2, H3, H4 ...
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... GND PROTECTION CIRCUITRY (UL RECOGNIZED A0–A19 Detailed Description The DS2065W is a 8Mb (1024kb x 8 bits) fully static, NV memory similar in function and organization to the DS1265W NV SRAM, but containing a rechargeable ML battery. The DS2065W NV SRAM constantly monitors V for an out-of-tolerance condition. When such a con- ...
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... Don’t care. The DS2065W executes a read cycle whenever WE (write enable) is inactive (high) and CE (chip enable) is active (low). The unique address specified by the 20 address inputs (A0 to A19) defines which of the 1,048,576 bytes of data accessed. Valid data will be available to the ...
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... V is greater than V CC its lifetime depends primarily on the seconds The DS2065W can maintain data from a single, initial charge for years. Once recharged, this deep- 6°C/second max discharge cycle can be repeated times, pro- 6 minutes max ducing a worst-case service life of 60 years. More ...
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... DS2065W 3.3V Single-Piece 8Mb Nonvolatile SRAM TOP VIEW GND A B N.C. A15 C D A16 RST DQ7 K L DQ6 M DQ5 N DQ4 P DQ3 DQ2 R T DQ1 DQ0 U GND V W GND Y GND Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...