M95256 datasheet(30/43 Pages) STMICROELECTRONICS

Part #	M95256

Description	256 Kbit serial SPI bus EEPROM with high-speed clock

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DC and AC parameters

M95256, M95256-W, M95256-R

30/43

Table 16.

AC characteristics (M95256, device grade 3)

Test conditions specified in Table 10 and Table 7

Symbol

Alt.

Parameter

Min.

Max.

Unit

fC

fSCK

Clock frequency

D.C.

5

MHz

tSLCH

tCSS1 S active setup time

90

ns

tSHCH

tCSS2 S not active setup time

90

ns

tSHSL

tCS

S deselect time

100

ns

tCHSH

tCSH

S active hold time

90

ns

tCHSL

S not active hold time

90

ns

tCH

(1)

1.

tCH + tCL must never be less than the shortest possible clock period, 1 / fC(max)

tCLH

Clock high time

90

ns

tCL

(1)

tCLL

Clock low time

90

ns

tCLCH

(2)

2.

Value guaranteed by characterization, not 100% tested in production.

tRC

Clock rise time

1

µs

tCHCL

(2)

tFC

Clock fall time

1

µs

tDVCH

tDSU

Data in setup time

20

ns

tCHDX

tDH

Data in hold time

30

ns

tHHCH

Clock low hold time after HOLD not active

70

ns

tHLCH

Clock low hold time after HOLD active

40

ns

tCLHL

Clock low setup time before HOLD active

0

ns

tCLHH

Clock low setup time before HOLD not active

0

ns

tSHQZ

(2)

tDIS

Output disable time

100

ns

tCLQV

tV

Clock low to output valid

60

ns

tCLQX

tHO

Output hold time

0

ns

tQLQH

(2)

tRO

Output rise time

50

ns

tQHQL

(2)

tFO

Output fall time

50

ns

tHHQV

tLZ

HOLD high to output valid

50

ns

tHLQZ

(2)

tHZ

HOLD low to output High-Z

100

ns

tW

tWC

Write time

5

ms

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