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STK12C68 Datasheet(PDF) 12 Page - Cypress Semiconductor

Part No. STK12C68
Description  64 Kbit (8K x 8) AutoStore nvSRAM 25 ns, 35 ns, and 45 ns access times
Download  24 Pages
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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STK12C68 Datasheet(HTML) 12 Page - Cypress Semiconductor

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STK12C68
Document Number: 001-51027 Rev. *C
Page 12 of 24
SRAM Write Cycle
Parameter
Description
25 ns
35 ns
45 ns
Unit
Min
Max
Min
Max
Min
Max
Cypress
Parameter
Alt
tWC
tAVAV
Write Cycle Time
25
35
45
ns
tPWE
tWLWH, tWLEH
Write Pulse Width
20
25
30
ns
tSCE
tELWH, tELEH
Chip Enable To End of Write
20
25
30
ns
tSD
tDVWH, tDVEH
Data Setup to End of Write
10
12
15
ns
tHD
tWHDX, tEHDX
Data Hold After End of Write
0
0
0
ns
tAW
tAVWH, tAVEH
Address Setup to End of Write
20
25
30
ns
tSA
tAVWL, tAVEL
Address Setup to Start of Write
0
0
0
ns
tHA
tWHAX, tEHAX
Address Hold After End of Write
0
0
0
ns
tHZWE [9,10]
tWLQZ
Write Enable to Output Disable
10
13
14
ns
tLZWE [9]
tWHQX
Output Active After End of Write
5
5
5
ns
Switching Waveforms
Figure 9. SRAM Write Cycle 1: WE Controlled [11, 12]
Figure 10. SRAM Write Cycle 2: CE Controlled [11, 12]
tWC
tSCE
tHA
tAW
tSA
tPWE
tSD
tHD
tHZWE
tLZWE
ADDRESS
CE
WE
DATA IN
DATA OUT
DATA VALID
HIGH IMPEDANCE
PREVIOUS DATA
tWC
ADDRESS
tSA
tSCE
tHA
tAW
tPWE
tSD
tHD
CE
WE
DATA IN
DATA OUT
HIGH IMPEDANCE
DATA VALID
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