DS1249Y Maxim, DS1249Y Datasheet
DS1249Y
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DS1249Y Summary of contents
Page 1
... Low-power CMOS operation Read and write access times Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time Full ± 10% V operating range (DS1249Y) CC Optional ± operating range CC (DS1249AB) Optional industrial temperature range of -40° ...
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... ODW DATA RETENTION MODE The DS1249AB provides full functional capability for V 4.5 volts. The DS1249Y provides full-functional capability for V protects by 4.25 volts. Data is maintained in the absence of V The nonvolatile static RAMs constantly monitor V automatically write protects themselves, all inputs become “don’t care,” and all outputs become high impedance ...
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... See Note 10) A TYP MAX UNITS NOTES 5.0 5.25 V 5 ±5% for DS1249AB ±10% for DS1249Y) CC TYP MAX UNITS NOTES µA +2.0 µA +2 1.0 1.5 mA µA 100 150 85 mA 4.62 4.75 V 4.37 4 +25° ...
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... WR1 t 15 WR2 t ODW t 5 OEW DH1 t DH2 DS1249Y/ ±5% for DS1249AB ±10% for DS1249Y) UNITS NOTES MAX ...
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... READ CYCLE SEE NOTE 1 WRITE CYCLE 1 SEE NOTES and DS1249Y/AB ...
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... WRITE CYCLE 2 SEE NOTES and 13 POWER-DOWN/POWER-UP CONDITION SEE NOTE DS1249Y/AB ...
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... IH and . t is measured from the latter going high going high going high. WE going high DS1249Y/ See Note 10) A TYP MAX UNITS NOTES µs 1.5 µs µ 125 +25°C) A TYP ...
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... Input pulse Rise and Fall Times SUPPLY PIN-PACKAGE TOLERANCE 5V ± 740 EDIP 5V ± 740 EDIP 5V ± 10% 32 740 EDIP 5V ± 10% 32 740 EDIP OUTLINE NO. MDT32#7 21-0245 DS1249Y/AB SPEED GRADE (ns Note that a “+”, LAND PATTERN NO. — ...
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... Updated the storage information, soldering temperature, and lead temperature information in the Absolute Maximum Ratings section; 11/10 removed the -100 MIN/MAX information from the AC Electrical Characteristics table; updated the Ordering Information table (removed - 100 parts and leaded -70 parts); updated the Package Information table DESCRIPTION DS1249Y/AB PAGES CHANGED ...