STK12C68-CF25I datasheet(7/20 Pages) SIMTEK

部件名	STK12C68-CF25I

功能描述	8Kx8 AutoStore nvSRAM

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制造商	SIMTEK [Simtek Corporation]

网页	http://www.simtek.com

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STK12C68 (SMD5962-94599)

February 2007

Document Control #ML0008 Rev 0.7

AutoStore / POWER-UP RECALL

(VCC = 5.0V ± 10%)e

Note s: tRESTORE starts from the time VCC rises above VSWITCH.

Note t:

HSB is asserted low for 1μs when VCAP drops through VSWITCH. If an SRAM WRITE has not taken place since the last nonvolatile cycle, HSB

will be released and no STORE will take place.

AutoStore / POWER-UP RECALL

NO.

SYMBOLS

PARAMETER

STK12C68

UNITS

NOTES

Standard

Alternate

MIN

MAX

27

tRESTORE

Power-up RECALL Duration

550

μs

s

28

tSTORE

tHLHZ

STORE

Cycle Duration

10

ms

p, q, t

29

tVSBL

Low Voltage Trigger (VSWITCH) to HSB Low

300

ns

l

30

tDELAY

tBLQZ

Time Allowed to Complete SRAM Cycle

1

μs

p

31

VSWITCH

Low Voltage Trigger Level

4.0

4.5

V

32

VRESET

Low Voltage Reset Level

3.9

V

30

tDELAY

29

tVSBL

POWER-UP

RECALL

BROWN OUT

NO STORE

(NO SRAM WRITES)

NO RECALL

(VCC DID NOT GO

BELOW VRESET)

BROWN OUT

AutoStore

NO RECALL

(VCC DID NOT GO

BELOW VRESET)

BROWN OUT

AutoStore

RECALL

WHEN

VCC RETURNS

ABOVE VSWITCH

AutoStoreTM

HSB

W

DQ (DATA OUT)

28

tSTORE

27

tRESTORE

POWER-UP RECALL

31

VSWITCH

32

VRESET

VCC

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