CY7C026A-20AC Cypress Semiconductor Corp, CY7C026A-20AC Datasheet - Page 10

• Manufacturer Part Number: CY7C026A-20AC
• Description: IC SRAM 16KX16 ASYN DUAL 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C026A-20AC

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 256K (16K x 16)
• Speed: 20ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1162

Switching Waveforms
Document #: 38-06046 Rev. *A
Write Cycle No. 2: CE Controlled Timing
Write Cycle No. 1: R/W Controlled Timing
Notes:
25. R/W must be HIGH during all address transitions.
26. A write occurs during the overlap (t
27. t
28. If OE is LOW during a R/W controlled write cycle, the write pulse width must be the larger of t
29. To access RAM, CE = V
30. To access upper byte, CE = V
31. Transition is measured 500 mV from steady state with a 5-pF load (including scope and jig). This parameter is sampled and not 100% tested.
32. During this period, the I/O pins are in the output state, and input signals must not be applied.
33. If the CE or SEM LOW transition occurs simultaneously with or after the R/W LOW transition, the outputs remain in the high-impedance state.
CE
DATA OUT
ADDRESS
ADDRESS
CE
DATA IN
DATA IN
[29,30]
data to be placed on the bus for the required t
can be as short as the specified t
To access lower byte, CE = V
HA
[29,30]
R/W
R/W
is measured from the earlier of CE or R/W or (SEM or R/W) going HIGH at the end of write cycle.
OE
IL
, SEM = V
IL
IL
(continued)
t
t
SA
SA
, LB = V
, UB = V
NOTE 32
PWE
SCE
IH
.
.
IL
or t
IL
, SEM = V
, SEM = V
PWE
SD
) of a LOW CE or SEM and a LOW UB or LB.
t
[25, 26, 27, 33]
. If OE is HIGH during an R/W controlled write cycle, this requirement does not apply and the write pulse
HZWE
[25, 26, 27, 28]
IH
IH
.
.
[31]
t
t
AW
AW
t
t
WC
WC
t
t
SCE
PWE
[28]
t
t
SD
SD
PWE
or (t
t
t
HA
HA
HZWE
t
t
HD
HD
+ t
t
LZWE
SD
) to allow the I/O drivers to turn off and
t
HZOE
NOTE 32
[31]
CY7C026A
CY7C036A
Page 10 of 18