DS1249W Maxim, DS1249W Datasheet
DS1249W
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DS1249W Summary of contents
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... JEDEC standard 32-pin DIP package DESCRIPTION The DS1249W 2048kb nonvolatile (NV) SRAMs are 2,097,152-bit, fully static, NV SRAMs organized as 262,144 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry that constantly monitors V for an out-of-tolerance condition. When such a condition occurs, the lithium ...
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... However, if the output drivers are enabled ( will disable the outputs in t ODW DATA-RETENTION MODE The DS1249W provides full functional capability for V 2.8V. Data is maintained in the absence of V static RAMs constantly monitor V write protects themselves, all inputs become “don’t care,” and all outputs become high impedance falls below approximately 2 ...
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... CCS1 I CCS2 I CCO1 V 2.8 TP SYMBOL MIN I DS1249W -0.3V to +4.6V 0°C to +70°C -40°C to +85°C -40°C to +85°C +260° See Note 10) A TYP MAX UNITS NOTES 3.3 3 +0.4 V ± = 3.3V CC TYP MAX UNITS NOTES µ ...
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... COE 100 WR1 t 20 WR2 t ODW t 5 OEW DH1 t 20 DH2 DS1249W = 3.3V ± 0.3V) CC UNITS NOTES MAX ns 100 100 ...
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... WRITE CYCLE 1 SEE NOTES and 12 WRITE CYCLE 2 SEE NOTES and DS1249W ...
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... going high going high See Note 10) A TYP MAX UNITS µs 1.5 µs µ 125 TYP MAX UNITS years is measured from the latter of low transition in Write WE DS1249W NOTES 11 = +25°C) NOTES ...
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... WE WE the output buffers remain in a high-impedance state during this period. 9. Each DS1249W has a built-in switch that disconnects the lithium source until V the user. The expected t DR time power is first applied by the user. ...
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... Updated the storage information, soldering temperature, and lead temperature information in the Absolute Maximum Ratings section; 11/10 removed the -150 MIN/MAX information from the AC Electrical Characteristics table; updated the Ordering Information table (removed - 150 parts and leaded -100 parts); added the Package Information table DESCRIPTION DS1249W PAGES CHANGED ...