DS1225 Dallas, DS1225 Datasheet
DS1225
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DS1225 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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... 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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... 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 ...
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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 TYP MAX UNITS 300 300 125 REC SYMBOL MIN TYP MAX UNITS DS1225AB/ See Note 10) A NOTES 25°C) A NOTES years 9 ...
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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 3.05 G IN. 0.090 MM 2. 0.590 MM 14.99 J IN. 0.008 MM 0.20 K IN. 0.015 MM 0. DS1225AB/AD MAX 1.540 39.12 0.720 18.29 0.415 10.54 0.130 3.30 0.030 0.76 0.160 4 ...