FM25H20-DGTR datasheet(9/15 Pages) RAMTRON

Numer części	FM25H20-DGTR

Szczegółowy opis	2Mb Serial 3V F-RAM Memory

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Producent	RAMTRON [Ramtron International Corporation]

Strona internetowa	http://www.ramtron.com

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FM25H20 - 2Mb SPI FRAM

Rev. 2.2

Sept. 2010

Page 9 of 15

Endurance

The FM25H20 is capable of being accessed at least

operates with a read and restore mechanism.

Therefore, an endurance cycle is applied on a row

basis for each access (read or write) to the memory

array. The F-RAM architecture is based on an array

of rows and columns. Rows are defined by A17-A3

and column addresses by A2-A0.

See Block

Diagram (pg 2) which shows the array as 32K rows

of 64-bits each. The entire row is internally accessed

each time a byte in that row is read or written. All 8

bytes in the row are counted separately for each

access in an endurance calculation. The table below

shows endurance calculations for 256-byte repeating

loop, which includes an op-code, a starting address (3

bytes), and a sequential 256-byte data stream. This

causes each byte to experience eight endurance

cycles through the loop. F-RAM read and write

endurance is very high even at 40MHz clock rate.

Table 5. Time to Reach 100 Trillion Cycles for Repeating 256-byte Loop

SCK Freq

(MHz)

Endurance

Cycles/sec.

Endurance

Cycles/year

Years to Reach

1014 Cycles

40

153,848

4.85 x 1012

20.6

20

76,924

2.43 x 1012

41.2

10

38,462

1.21 x 1012

82.4

5

19,231

6.06 x 1011

164.8

Podobny numer części - FM25H20-DGTR

Producent	Numer części	Arkusz danych	Szczegółowy opis
Cypress Semiconductor	FM25H20-DGTR	438Kb / 16P	2Mb Serial 3V F-RAM Memory

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Podobny opis - FM25H20-DGTR

Producent	Numer części	Arkusz danych	Szczegółowy opis
Cypress Semiconductor	FM25H20	438Kb / 16P	2Mb Serial 3V F-RAM Memory
Cypress Semiconductor	FM25V20	531Kb / 17P	2Mb Serial 3V F-RAM Memory
Ramtron International C...	FM25V20	531Kb / 17P	2Mb Serial 3V F-RAM Memory
	FM25V02	343Kb / 17P	256Kb Serial 3V F-RAM Memory
	FM25V10	333Kb / 16P	1Mb Serial 3V F-RAM Memory
Cypress Semiconductor	FM24CL64B	354Kb / 13P	64Kb Serial 3V F-RAM Memory
	FM24V01	378Kb / 14P	128Kb Serial 3V F-RAM Memory
	FM24V02	401Kb / 16P	256Kb Serial 3V F-RAM Memory
	FM25L16B	473Kb / 14P	16Kb Serial 3V F-RAM Memory
	FM24CL16B	364Kb / 14P	16Kb Serial 3V F-RAM Memory

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FM25H20-DGTR Arkusz danych(PDF) 9 Page - Ramtron International Corporation

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