CY7C4245V-25ASC Cypress Semiconductor Corp, CY7C4245V-25ASC Datasheet - Page 16

• Manufacturer Part Number: CY7C4245V-25ASC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4245V-25ASC

• Configuration: Dual
• Density: 64Kb
• Access Time (max): 15ns
• Word Size: 18b
• Organization: 4Kx18
• Sync/async: Synchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: TQFP
• Clock Freq (max): 40MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Supply Current: 30mA
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Not Compliant

Switching Waveforms
Notes
Document #: 38-06029 Rev. *D
20. PAE offset − n. Number of data words into FIFO already = n.
21. PAE offset − n.
22. t
23. If a read is performed on this rising edge of the read clock, there will be Empty + (n−1) words in the FIFO when PAE goes LOW.
and the rising RCLK is less than t
SKEW3
PAE
WEN
WCLK
WCLK
RCLK
RCLK
is the minimum time between a rising WCLK and a rising RCLK edge for PAE to change state during that clock cycle. If the time between the edge of WCLK
REN
WEN
PAE
REN
[20]
Figure 13. Programmable Almost Empty Flag Timing (applies only in SMODE (SMODE is LOW)
t
CLKH
SKEW3
(continued)
, then PAE may not change state until the next RCLK.
t
SKEW3
Figure 12. Programmable Almost Empty Flag Timing
t
CLKH
t
ENS
[22]
t
ENH
t
CLKL
Note 21
t
ENS
t
ENH
t
t
PAEsynch
CLKL
t
PAE
t
t
ENS
ENS
n+1 WORDS
N + 1 WORDS
IN FIFO
INFIFO
t
ENS
t
PAE
t
ENH
CY7C4225V/4215V
CY7C4235V/4245V
n WORDS IN FIFO
Note 23
t
PAEsynch
Page 16 of 23
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