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STK22C48-SF25TR Arkusz danych(PDF) 7 Page - Simtek Corporation

Numer części STK22C48-SF25TR
Szczegółowy opis  2Kx8 AutoStore nvSRAM
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Producent  SIMTEK [Simtek Corporation]
Strona internetowa  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

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7
STK22C48
Feb, 2008
Document Control #ML0004 Rev 2.0
AutoStore™/POWER-UP RECALL
(VCC = 5.0V ± 10%)
e
Note r:
tRESTORE starts from the time VCC rises above VSWITCH.
Note s:
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
STK22C48
UNITS
NOTES
Standard
Alternate
MIN
MAX
27
tRESTORE
Power-up RECALL Duration
550
μs
r
28
tSTORE
tHLHZ
STORE
Cycle Duration
10
ms
p, s
29
tVSBL
Low Voltage Trigger (VSWITCH) to HSB Low
300
ns
l
30
tDELAY
tBLQZ
Time Allowed to Complete SRAM Cycle
1
μs
o
31
VSWITCH
Low Voltage Trigger Level
4.0
4.5
V
32
VRESET
Low Voltage Reset Level
3.6
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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