CY7C109 CYPRESS [Cypress Semiconductor], CY7C109 Datasheet - Page 7

• Manufacturer Part Number: CY7C109
• Description: 128K x 8 Static RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Switching Waveforms
Write Cycle No. 1 (CE
Write Cycle No. 2 (WE Controlled, OE HIGH During Write)
Notes:
Document #: 38-05032 Rev. **
13. Data I/O is high impedance if OE = V
14. If CE
ADDRESS
ADDRESS
DATA I/O
DATA I/O
CE
CE
1
CE
CE
WE
WE
OE
goes HIGH or CE
1
2
1
2
NOTE 15
2
goes LOW simultaneously with WE going HIGH, the output remains in a high-impedance state.
1
or CE
(continued)
2
Controlled)
IH
t
.
SA
t
HZOE
t
SA
[13, 14]
t
t
AW
AW
t
SCE
t
SCE
t
WC
[13, 14]
t
WC
t
PWE
DATA
t
t
PWE
SD
DATA VALID
t
SCE
t
t
SD
SCE
IN
VALID
t
HD
t
t
HA
HA
t
HD
CY7C1009
CY7C109
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109–9
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