CY7C109B-20VI Cypress Semiconductor Corp, CY7C109B-20VI Datasheet - Page 7

• Manufacturer Part Number: CY7C109B-20VI
• Description: SRAM Chip Async Single 5V 1M-Bit 128K x 8 20ns 32-Pin SOJ
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C109B-20VI

• Package: 32SOJ
• Timing Type: Asynchronous
• Density: 1 Mb
• Typical Operating Supply Voltage: 5 V
• Address Bus Width: 17 Bit
• Number Of I/o Lines: 8 Bit
• Number Of Ports: 1
• Number Of Words: 128K

Switching Waveforms
Write Cycle No. 1 (CE
Write Cycle No. 2 (WE Controlled, OE HIGH During Write)
Notes:
Document #: 38-05038 Rev. *A
13. Data I/O is high impedance if OE = V
14. If CE
15. During this period the I/Os are in the output state and input signals should not be applied.
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
CY7C1009B
CY7C109B
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