STK16C88-WF25I Cypress Semiconductor Corp, STK16C88-WF25I Datasheet - Page 10

• Manufacturer Part Number: STK16C88-WF25I
• Description: STK16C88-WF25I
• Manufacturer: Cypress Semiconductor Corp

Specifications of STK16C88-WF25I

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 256K (32K x 8)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Switching Waveforms
Notes
Document Number: 001-50595 Rev. *B
Table 4. SRAM Write Cycle
t
t
t
t
t
t
t
t
t
t
8. If WE is Low when CE goes Low, the outputs remain in the high impedance state.
9. CE or WE must be greater than V
WC
PWE
SCE
SD
HD
AW
SA
HA
HZWE
LZWE
Parameter
Cypress
[7]
[7,8]
ADDRESS
DATA OUT
ADDRESS
DATA OUT
DATA IN
DATA IN
WE
CE
CE
WE
Parameter
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.
PREVIOUS DATA
t
SA
t
Figure 7. SRAM Write Cycle 1: WE Controlled
Figure 8. SRAM Write Cycle 2: CE Controlled
SA
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
Description
HIGH IMPEDANCE
t
t
AW
t
PWE
AW
t
HZWE
t
t
t
SCE
SCE
WC
t
WC
t
t
HIGH IMPEDANCE
PWE
SD
DATA VALID
DATA VALID
t
SD
Min
25
20
20
10
20
0
0
0
5
t
[9]
[9]
HA
t
t
t
25 ns
HD
HA
HD
Max
10
t
LZWE
Min
45
30
30
15
30
0
0
0
5
45 ns
STK16C88
Max
15
Page 10 of 15
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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