DS1225AD Dallas Semiconductor, DS1225AD Datasheet
DS1225AD
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DS1225AD 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 available to the eight data output drivers within t stable, providing that CE and OE access times are also satisfied ...
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... IND parts -40°C to +70°C; -40°C to +85°C for IND parts 260°C for 10 seconds SYMBOL MIN TYP V 4.75 5 4. =5V ± 10% for DS1225AD) CC SYMBOL MIN TYP 5.0 CCS1 I 3.0 CCS2 ...
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... Output Active from WE Data Setup Time Data Hold Time (V (V DS1225AB-70 DS1225AD-70 SYMBOL MIN MAX ACC COE WR1 t 10 WR2 25 t ODW 5 t OEW DH1 t 10 DH2 DS1225AB/AD =5V ± 5% for DS1225AB See Note 10) A =5V ± 10% for DS1225AD) CC DS1220AB-85 DS1220AD-85 UNITS NOTES MIN MAX ...
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... Output High Z from Deselection Output Hold from Address Change Write Cycle Time Write Pulse Width Address Setup Time Write Recovery Time Output High Z from WE Output Active from WE Data Setup Time Data Hold Time DS1225AB- 150 DS1225AD- 150 SYMBOL MIN MAX t 150 RC t 150 ACC 70 t ...
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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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POWER-DOWN/POWER-UP CONDITION SEE NOTE 11 POWER-DOWN/POWER-UP TIMING PARAMETER CE V before Power-Down slew from slew from after Power-Up IH PARAMETER Expected ...
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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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ORDERING INFORMATION DS1225AB/AD ...
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DS1225AB/AD NONVOLATILE SRAM, 28-PIN, 720-MIL EXTENDED MODULE PKG 28-PIN DIM MIN A IN. 1.520 MM 38.61 B IN. 0.695 MM 17.65 C IN. 0.395 MM 10.03 D IN. 0.100 MM 2.54 E IN. 0.017 MM 0.43 F IN. 0.120 MM ...