CY7C4225-15ASC Cypress Semiconductor Corp, CY7C4225-15ASC Datasheet - Page 11

• 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. **
19. t
20. The clocks (RCLK, WCLK) can be free-running during reset.
21. After reset, the outputs will be LOW if OE = 0 and three-state if OE = 1.
the rising edge of WCLK and the rising edge of RCLK is less than t
SKEW2
REN, WEN,
Q
0
EF,PAE
FF,PAF,
Q
WCLK
–Q
RCLK
is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH during the current clock cycle. It the time between
WEN
REN
0
–Q
OE
EF
17
RS
HF
LD
17
t
ENS
t
OLZ
(continued)
t
ENH
t
CLKH
t
t
A
REF
t
t
t
RSF
RSF
RSF
t
OE
t
RS
Figure 7. Read Cycle Timing
t
Figure 8. Reset Timing
CLK
t
SKEW2
NO OPERATION
SKEW2
[19]
t
CLKL
, then EF may not change state until the next RCLK edge.
[20]
VALID DATA
t
RSR
t
REF
t
OHZ
CY7C4425/4205/4215
CY7C4225/4235/4245
OE = 0
OE = 1
[21]
Page 11 of 22
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