CY7C4231V-25AC Cypress Semiconductor Corp, CY7C4231V-25AC Datasheet - Page 14
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CY7C4231V-25AC
Manufacturer Part Number
CY7C4231V-25AC
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.CY7C4231V-25AC.pdf
(18 pages)
Specifications of CY7C4231V-25AC
Configuration
Dual
Density
18Kb
Access Time (max)
15ns
Word Size
9b
Organization
2Kx9
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
20mA
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
Part Number:
CY7C4231V-25AC
Manufacturer:
CYPRESS/赛普拉斯
Quantity:
20 000
Document #: 38-06010 Rev. *B
Switching Waveforms
Programmable Almost Full Flag Timing
Write Programmable Registers
Notes:
21. If a write is performed on this rising edge of the write clock, there will be Full – (m–1) words of the FIFO when PAF goes LOW.
22. PAF offset = m.
23. 64–m words for CY7C4421V, 256-m words in FIFO for CY7C4201V, 512–m words for CY7C4211V, 1024–m words for CY7C4221V, 2048–m words for
24. t
(if applicable)
WEN2/LD
CY7C4231V, 4096–m words for CY7C4241V, 8192–m words for CY7C4251V.
of RCLK and the rising edge of WCLK is less than t
SKEW2
WEN2
WCLK
WCLK
WEN1
D
REN1,
WEN1
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
8
t
t
CLKH
CLKH
FULL − (M+1) WORDS
(continued)
t
CLK
t
t
ENS
ENS
t
IN FIFO
DS
PAE OFFSET
t
t
ENS
ENS
LSB
SKEW2
t
t
ENH
ENH
t
t
CLKL
CLKL
, then PAF may not change state until the next WCLK.
t
ENH
t
DH
Note 21
[22]
PAE OFFSET
MSB
t
PAF
CY7C4421V/4201V/4211V/4221V
t
ENS
PAF OFFSET
t
SKEW2
FULL − M WORDS
LSB
CY7C4231V/4241V/4251V
IN FIFO
t
ENS
[24]
t
[23]
ENH
PAF OFFSET
MSB
t
PAF
Page 14 of 18
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