STK11C68-SF25I Cypress Semiconductor Corp, STK11C68-SF25I Datasheet - Page 9

• Manufacturer Part Number: STK11C68-SF25I
• Description: STK11C68-SF25I
• Manufacturer: Cypress Semiconductor Corp

Specifications of STK11C68-SF25I

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 64K (8K x 8)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (8.69mm width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Switching Waveforms
Notes
Document Number: 001-50638 Rev. *A
SRAM Write Cycle
t
t
t
t
t
t
t
t
t
t
7. If WE is Low when CE goes Low, the outputs remain in the high impedance state.
8. CE or WE must be greater than V
WC
PWE
SCE
SD
HD
AW
SA
HA
HZWE
LZWE
Parameter
Cypress
[6]
[6,7]
ADDRESS
DATA OUT
ADDRESS
DATA OUT
DATA IN
DATA IN
Parameter
WE
CE
CE
WE
t
t
t
t
t
t
t
t
t
t
AVAV
WLWH,
ELWH,
DVWH,
WHDX,
AVWH,
AVWL,
WHAX,
WLQZ
WHQX
t
t
t
t
t
t
t
ELEH
AVEL
AVEH
EHAX
WLEH
DVEH
EHDX
Alt
IH
during address transitions.
Figure 8. SRAM Write Cycle 2: CE and OE Controlled
PREVIOUS DATA
Write Cycle Time
Write Pulse Width
Chip Enable To End of Write
Data Setup to End of Write
Data Hold After End of Write
Address Setup to End of Write
Address Setup to Start of Write
Address Hold After End of Write
Write Enable to Output Disable
Output Active After End of Write
t
SA
Figure 7. SRAM Write Cycle 1: WE Controlled
t
SA
Description
HIGH IMPEDANCE
t
t
AW
PWE
t
AW
t
HZWE
t
t
t
SCE
WC
SCE
t
WC
t
t
SD
HIGH IMPEDANCE
PWE
DATA VALID
DATA VALID
Min
t
20
25
20
10
20
SD
0
0
0
5
25 ns
Max
10
t
[7, 8]
HA
t
t
t
HD
HD
HA
[7, 8]
Min
35
25
25
12
25
0
0
0
5
35 ns
t
LZWE
Max
13
Min
45
30
30
15
30
0
0
0
5
45 ns
STK11C68
Max
15
Page 9 of 17
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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