STK12C68-L45 데이터 시트보기 (PDF) - Simtek Corporation
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STK12C68-L45 Datasheet PDF : 20 Pages
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AutoStore / POWER-UP RECALL
STK12C68 (SMD5962-94599)
(VCC = 5.0V ± 10%)e
SYMBOLS
NO.
Standard
Alternate
PARAMETER
STK12C68
MIN MAX
UNITS NOTES
27
tRESTORE
28
tSTORE
tHLHZ
29
tVSBL
30
tDELAY
tBLQZ
31
VSWITCH
32
VRESET
Power-up RECALL Duration
STORE Cycle Duration
Low Voltage Trigger (VSWITCH) to HSB Low
Time Allowed to Complete SRAM Cycle
Low Voltage Trigger Level
Low Voltage Reset Level
550
μs
s
10
ms p, q, t
300
ns
l
1
μs
p
4.0
4.5
V
3.9
V
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
VCC
31
VSWITCH
32
VRESET
AutoStoreTM
POWER-UP RECALL
HSB
27
tRESTORE
W
DQ (DATA OUT)
29
tVSBL
30
tDELAY
28
tSTORE
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
Document Control #ML0008 Rev 0.7
7
February 2007
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