CY7C4225-15ASC Cypress Semiconductor Corp, CY7C4225-15ASC Datasheet - Page 14

• Manufacturer Part Number: CY7C4225-15ASC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4225-15ASC

• Configuration: Dual
• Density: 18Kb
• Access Time (max): 10ns
• Word Size: 18b
• Organization: 1Kx18
• Sync/async: Synchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: TQFP
• Clock Freq (max): 66.7MHz
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 45mA
• 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 Number: 001-45652 Rev. **
24. PAE offset − n. Number of data words into FIFO already = n.
25. PAE offset − n.
26. t
27. 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
WEN
REN
REN
PAE
[24]
Figure 14. 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 13. Programmable Almost Empty Flag Timing
t
CLKH
t
ENS
[26]
t
ENH
t
CLKL
Note 25
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
CY7C4425/4205/4215
CY7C4225/4235/4245
n WORDS IN FIFO
Note 27
t
PAEsynch
Page 14 of 22
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