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STK20C04-W25 데이터시트(PDF) 5 Page - Simtek Corporation

부품명 STK20C04-W25
상세설명  512 x 8 nvSRAM QuantumTrap??CMOS Nonvolatile Static RAM
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제조업체  SIMTEK [Simtek Corporation]
홈페이지  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

STK20C04-W25 데이터시트(HTML) 5 Page - Simtek Corporation

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STK20C04
March 2006
5
Document Control # ML0001 rev 0.2
MODE SELECTION
Note k:
An automatic RECALL takes place at power up, starting when VCC exceeds 4.25V and taking tRESTORE.
STORE CYCLES #1 & #2
(VCC = 5.0V ± 10%)
Note l:
Measured with W and NE both returned high, and G returned low. STORE cycles are inhibited below 4.0V.
Note m: Once tWC has been satisfied by NE, G, W and E, the STORE cycle is completed automatically. Any of NE, G, W or E may be used to terminate
the STORE initiation cycle.
Note n:
If E is low for any period of time in which W is high while G and NE are low, then a RECALL cycle may be initiated.
STORE CYCLE #1: W Controlledn
STORE CYCLE #2: E Controlledn
E
W
G
NE
MODE
POWER
H
X
X
X
Not Selected
Standby
L
H
L
H
Read SRAM
Active
L
L
X
H
Write SRAM
Active
L
H
L
L
Nonvolatile RECALLk
Active
L
L
H
L
Nonvolatile STORE
ICC2
L
L
L
H
L
H
L
X
No Operation
Active
NO.
SYMBOLS
PARAMETER
MIN
MAX
UNITS
#1
#2
Alt.
22
tWLQX
l
tELQX
tSTORE
STORE Cycle Time
10
ms
23
tWLNH
m
tELNH
tWC
STORE Initiation Cycle Time
20
ns
24
tGHNL
Output Disable Set-up to NE Fall
0
ns
25
tGHEL
Output Disable Set-up to E Fall
0
ns
26
tNLWL
tNLEL
NE Set-up
0
ns
27
tELWL
Chip Enable Set-up
0
ns
28
tWLEL
Write Enable Set-up
0
ns
HIGH IMPEDANCE
NE
G
W
E
DQ (DATA OUT)
24
tGHNL
26
tNLWL
23
tWLNH
27
tELWL
22
tWLQX
NE
G
W
E
DQ (DATA OUT)
HIGH IMPEDANCE
26
tNLEL
25
tGHEL
28
tWLEL
23
tELNH
22
tELQX


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