DS2227 Maxim, DS2227 Datasheet
DS2227
Related parts for DS2227
DS2227 Summary of contents
Page 1
... The DS2227 employs the popular JEDEC standard 72-position SIMM connection scheme requiring no additional circuitry. OPERATION The DS2227 Flexible NV SRAM Stik is used like any standard static RAM. All nonvolatile circuitry is transparent to the user. The flexibility of the part is achieved by providing separate read, write, and chip Flexible NV SRAM Stik ...
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... Normal RAM operation can resume after V The DS2227 checks lithium status to warn of potential data loss. Each time that V the DS2227, the battery voltage is checked with a precision comparator. If the battery supply is less than 2.0 volts, the second memory access to the device is inhibited. determined by a three-step process. First, a read cycle is performed to any location in memory, in order to save the contents of that location ...
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... DS2227 SIGNAL NAME 4-D0 4-D1 4-D2 4-D3 4-D4 4-D5 4-D6 4- GND A10 A11 A12 A13 A14 A15 A16 NC NC ...
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... SCHEMATIC (1 CELL) Figure DS2227 ...
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... 2.0 3 4.25 4.37 TP SYMBOL MIN TYP OUT MAX UNITS 5 +0.8 V (0°C to 70° MAX UNITS +1.0 µA +5.0 µ 280 mA 4 MAX UNITS DS2227 NOTES 10%) NOTES = 25°C) NOTES ...
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... MIN MAX MIN MAX MIN MAX 70 100 70 100 100 100 DS2227-120 UNITS NOTES 120 ns 120 120 120 4,5,10 DS2227 ...
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... READ CYCLE SEE NOTE 1 WRITE CYCLE 1 SEE NOTES AND 8 WRITE CYCLE 2 SEE NOTES AND DS2227 ...
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... Slew from after Power- PARAMETER Expected Data Retention SYMBOL MIN TYP 300 REC SYMBOL MIN TYP DS2227 MAX UNITS NOTES µs µs µs 125 25°C) A MAX UNITS NOTES years ...
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... If the is low or the WE transition, the output buffers remain in a high impedance state in this period. 9. Each DS2227 is marked with a 4-digit date code AABB. AA designates the year of manufacture. BB designates the week of manufacture. The minimum expected t date of manufacture. 10. Timings are valid only when DC TEST CONDITIONS ...
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... DS2227 72-PIN SIP STIK NOTE: DIMENSIONS ARE SHOWN IN INCHES. DIM DS2227 72-PIN MIN MAX 4.245 4.255 3.979 3.989 0.845 0.855 0.395 0.405 0.245 0.255 0.050 BASIC 0.075 0.085 0.245 0.255 1.750 BASIC ...