CY7C144AV-20AC Cypress Semiconductor Corp, CY7C144AV-20AC Datasheet - Page 11

• Manufacturer Part Number: CY7C144AV-20AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C144AV-20AC

• Density: 64Kb
• Access Time (max): 20ns
• Operating Supply Voltage (typ): 3.3V
• Package Type: TQFP
• Operating Temp Range: 0C to 70C
• Supply Current: 175mA
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Word Size: 8b
• Lead Free Status / Rohs Status: Not Compliant

Switching Waveforms
Document #: 38-06051 Rev. *C
Write Cycle No. 2: CE Controlled Timing
Write Cycle No. 1: R/W Controlled Timing
Notes:
29. R/W must be HIGH during all address transitions.
30. A write occurs during the overlap (t
31. t
32. If OE is LOW during a R/W controlled write cycle, the write pulse width must be the larger of t
33. 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.
34. To access RAM, CE = V
35. During this period, the I/O pins are in the output state, and input signals must not be applied.
36. 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
to be placed on the bus for the required t
as short as the specified t
HA
[34]
[34]
is measured from the earlier of CE or R/W or (SEM or R/W) going HIGH at the end of write cycle.
R/W
R/W
OE
IL
PWE
, SEM = V
.
t
t
(continued)
SA
SA
SCE
IH
Note 35
.
or t
SD
PWE
. If OE is HIGH during an R/W controlled write cycle, this requirement does not apply and the write pulse can be
) of a LOW CE or SEM.
t
[29, 30, 31, 36]
HZWE
[29, 30, 31, 32]
[33]
t
t
AW
AW
t
t
WC
WC
t
t
SCE
PWE
[32]
t
t
SD
SD
PWE
or (t
HZWE
CY7C138AV/144AV/006AV
CY7C139AV/145AV/016AV
t
t
HA
HA
t
t
+ t
HD
HD
SD
t
LZWE
) to allow the I/O drivers to turn off and data
CY7C007AV/017AV
t
HZOE
[33]
Note 35
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