DS1225AB Maxim, DS1225AB Datasheet
DS1225AB
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DS1225AB Summary of contents
Page 1
... Optional industrial temperature range of -40°C to +85°C, designated IND DESCRIPTION The DS1225AB and DS1225AD are 65,536-bit, fully static, nonvolatile SRAMs organized as 8192 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry which constantly monitors V for an out-of-tolerance condition. When such a condition occurs, the lithium ...
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... READ MODE The DS1225AB and DS1225AD execute a read cycle whenever WE (Write Enable) is inactive (high) and CE (Chip Enable) and OE (Output Enable) are active (low). The unique address specified by the 13 address inputs ( defines which of the 8192 bytes of data accessed. Valid data will be ...
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... DS1225AB/AD -0.3V to +6.0V 0°C to +70°C -40°C to +85°C -40°C to +85°C +260° See Note 10) A MAX UNITS NOTES 5. See Note 10) A =5V ± 5% for DS1225AB) MAX UNITS NOTES µA +1.0 µA +1 10 4. +25°C) A ...
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... WR1 t 10 WR2 t ODW 5 t OEW DH1 t 10 DH2 DS1225AB/ See Note 10) A =5V ± 5% for DS1225AB) CC =5V ± 10% for DS1225AD) CC UNITS NOTES MAX ...
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... READ CYCLE SEE NOTE 1 WRITE CYCLE 1 SEE NOTES AND 12 WRITE CYCLE 2 SEE NOTES AND DS1225AB/AD ...
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... Under no circumstance are negative undershoots, of any amplitude, allowed when device is in battery backup mode. SYMBOL MIN t Inactive PD t 300 F t 300 REC SYMBOL MIN TYP MAX UNITS DS1225AB/ See Note 10) A TYP MAX UNITS µs 1.5 µs µ 125 years NOTES 11 = +25° ...
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... 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. 9. Each DS1225AB and each DS1225AD has a built-in switch that disconnects the lithium source until V is first applied by the user. The expected t ...
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... RoHS status. PACKAGE TYPE 28 EDIP SUPPLY TOLERANCE 5V ± ± ± 10% 5V ± 10% PACKAGE CODE OUTLINE NO. MDT28 DS1225AB/AD SPEED GRADE PIN-PACKAGE 28 720 EDIP 28 720 EDIP 28 720 EDIP 28 720 EDIP Note that a “+”, LAND PATTERN NO. 21-0245 — (ns) 70 ...
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... Updated the storage information, soldering temperature, and lead temperature information in the Absolute Maximum Ratings section; removed the -85, -150, and -200 MIN/MAX information from the 11/10 AC Electrical Characteristics table; updated the Ordering Information table (removed -85, -150, and -200 parts and leaded -70 parts) DESCRIPTION DS1225AB/AD PAGES CHANGED ...