CY7C4251-10JCT Cypress Semiconductor Corp, CY7C4251-10JCT Datasheet - Page 15
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CY7C4251-10JCT
Manufacturer Part Number
CY7C4251-10JCT
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.CY7C4251-10JCT.pdf
(20 pages)
Specifications of CY7C4251-10JCT
Configuration
Dual
Density
64Kb
Access Time (max)
8ns
Word Size
9b
Organization
8Kx9
Sync/async
Synchronous
Expandable
Yes
Bus Direction
Uni-Directional
Package Type
PLCC
Clock Freq (max)
100MHz
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Supply Current
35mA
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
32
Lead Free Status / RoHS Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CY7C4251-10JCT
Manufacturer:
CYPR
Quantity:
4 321
Document #: 38-06016 Rev. *D
Notes
24. If a write is performed on this rising edge of the write clock, there are Full – (m – 1) words of the FIFO when PAF goes LOW.
25. PAF offset = m.
26. 64-m words for CY7C4421, 256 – m words in FIFO for CY7C4201, 512 – m words for CY7C4211, 1024 – m words for CY7C4221, 2048 – m words for CY7C4231,
27. t
(if applicable)
WEN2/LD
4096 – m words for CY7C4241, 8192 – m words for CY7C4251.
RCLK and the rising edge of WCLK is less than t
SKEW2
WEN2
WCLK
WCLK
WEN1
D
WEN1
REN1,
RCLK
REN2
0
PAF
–D
is the minimum time between a rising RCLK edge and a rising WCLK edge for PAF to change during that clock cycle. If the time between the rising edge of
8
t
t
CLKH
CLKH
FULL − M+1 WORDS
t
CLK
t
t
ENS
ENS
t
IN FIFO
DS
PAE OFFSET
Figure 12. Programmable Almost Full Flag Timing
t
t
ENS
ENS
LSB
SKEW2
Figure 13. Write Programmable Registers
t
t
ENH
ENH
, then PAF may not change state until the next WCLK.
t
t
CLKL
CLKL
t
ENH
t
DH
Note
PAE OFFSET
25
Note
24
MSB
t
PAF
t
ENS
PAF OFFSET
t
SKEW2
FULL − M WORDS
LSB
IN FIFO
t
ENS
[27]
CY7C4421/4201/4211/4221
[26]
t
ENH
CY7C4231/4241/4251
PAF OFFSET
MSB
t
PAF
Page 15 of 20
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