Cypress Semiconductor STK16C88 Manual do Utilizador descarregar pdf (Página 25)

12.02.07

Simtek Confidential

nvSRAM vs Battery Backed SRAMs

Commercial, Industrial and MilitaryCommercial, IndustrialTemp Support

20 years10 yearsData Retention

Very high to accommodate the battery.

Max height is 9.65 mm

70 ns

Lower reliability inherent with the use

of the battery and snap hat due to:

•

Snap hat will fall off in assembly and

in the field

•

Battery can be corrosive

•

Batteries have higher PPM due to

higher likelyhood of failure

•

Batteries significantly effected by heat

Higher due to yield losses and

assembly costs for integration of

battery, SRAM and Vswitch circuit

BBSRAMs

Low profile. Max height is 2.8 mmHeight

25 – 45 nsAccess Times

High reliability associated with:

•

Elimination of the snap pack for the battery

•

Elimination of potential corrosive material

•

Elimination of potential battery failure

•

nvSRAMs minimally effected by heat

Reliability

Lower market pricing

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