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STK22C48 Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers

Part No. STK22C48
Description  2K x 8 AutoStore™ nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM
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Manufacturer  ETC1 [List of Unclassifed Manufacturers]
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STK22C48 Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers

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STK22C48
December 2002
4
Document Control # ML0004 rev 0.0
SRAM WRITE CYCLES #1 & #2
(VCC = 5.0V ± 10%)e
Note j:
If W is low when E goes low, the outputs remain in the high-impedance state.
Note k: E or W must be
≥ VIH during address transitions.
Note l:
HSB must be high during SRAM WRITE cycles.
SRAM WRITE CYCLE #1: W Controlledk, l
SRAM WRITE CYCLE #2: E Controlledk, l
NO.
SYMBOLS
PARAMETER
STK22C48-25
STK22C48-35
STK22C48-45
UNITS
#1
#2
Alt.
MIN
MAX
MIN
MAX
MIN
MAX
12
tAVAV
tAVAV
tWC
Write Cycle Time
25
35
45
ns
13
tWLWH
tWLEH
tWP
Write Pulse Width
20
25
30
ns
14
tELWH
tELEH
tCW
Chip Enable to End of Write
20
25
30
ns
15
tDVWH
tDVEH
tDW
Data Set-up to End of Write
10
12
15
ns
16
tWHDX
tEHDX
tDH
Data Hold after End of Write
0
0
0
ns
17
tAVWH
tAVEH
tAW
Address Set-up to End of Write
20
25
30
ns
18
tAVWL
tAVEL
tAS
Address Set-up to Start of Write
0
0
0
ns
19
tWHAX
tEHAX
tWR
Address Hold after End of Write
0
0
0
ns
20
tWLQZ i, j
tWZ
Write Enable to Output Disable
10
13
15
ns
21
tWHQX
tOW
Output Active after End of Write
5
5
5
ns
PREVIOUS DATA
DATA OUT
E
ADDRESS
12
tAVAV
W
16
tWHDX
DATA IN
19
tWHAX
13
tWLWH
18
tAVWL
17
tAVWH
DATA VALID
20
tWLQZ
15
tDVWH
HIGH IMPEDANCE
21
tWHQX
14
tELWH
DATA OUT
E
ADDRESS
12
tAVAV
W
DATA IN
13
tWLEH
17
tAVEH
DATA VALID
HIGH IMPEDANCE
14
tELEH
18
tAVEL
15
tDVEH
19
tEHAX
16
tEHDX


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