CY7C4291-15JC Cypress Semiconductor Corp, CY7C4291-15JC Datasheet - Page 12

• Manufacturer Part Number: CY7C4291-15JC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4291-15JC

• Configuration: Dual
• Density: 1.125Mb
• Access Time (max): 10ns
• Word Size: 9b
• Organization: 128Kx9
• Sync/async: Synchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: PLCC
• Clock Freq (max): 66.7MHz
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 40mA
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06007 Rev. *C
Switching Waveforms
Full Flag Timing
Programmable Almost Empty Flag Timing
Notes:
20. t
21. PAE offset = n.
22. 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.
(if applicable)
(if applicable)
WCLK and the rising RCLK is less than t
SKEW2
WEN2
WEN2
Q
D
WCLK
WEN1
REN1,
WCLK
REN1,
RCLK
WEN1
REN2
RCLK
0
0
REN2
PAE
–Q
–D
OE
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
FF
8
8
DATA IN OUTPUT REGISTER
t
t
LOW
SKEW1
CLKH
[13]
t
ENS
NO WRITE
(continued)
t
SKEW2
SKEW2
t
WFF
t
t
A
ENH
t
t
, then PAE may not change state until the next RCLK.
ENS
ENS
[20]
t
t
ENH
ENH
t
CLKL
t
DS
Note 21
t
PAE
DATA WRITE
DATA READ
t
ENS
t
WFF
t
SKEW1
N + 1 WORDS
t
[13]
ENS
IN FIFO
t
ENS
NO WRITE
t
ENH
t
WFF
t
t
A
ENH
Note 22
CY7C4281
CY7C4291
NEXT DATA READ
Page 12 of 16
DATA WRITE
t
PAE
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