CY7C4245-10AC Cypress Semiconductor Corp, CY7C4245-10AC Datasheet - Page 10
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CY7C4245-10AC
Manufacturer Part Number
CY7C4245-10AC
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.CY7C4245-10AC.pdf
(25 pages)
Specifications of CY7C4245-10AC
Configuration
Dual
Density
72Kb
Access Time (max)
8ns
Word Size
18b
Organization
4Kx18
Sync/async
Synchronous
Expandable
Yes
Bus Direction
Uni-Directional
Package Type
TQFP
Clock Freq (max)
100MHz
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
Programmable Almost Empty Flag Timing
Notes:
Programmable Almost Empty Flag Timing (applies only in SMODE (SMODE is LOW)
19. PAE offset – n. Number of data words into FIFO already = n.
20. PAE offset – n.
21. t
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.
PAE
WEN
WEN2
rising RCLK is less than t
WCLK
WCLK
SKEW3
RCLK
RCLK
WEN
REN
PAE
REN
]
[19]
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 and the
t
CLKH
SKEW3
, then PAE may not change state until the next RCLK.
(continued)
t
SKEW3
t
CLKH
t
t
ENS
ENS
[21]
t
t
ENH
ENH
t
CLKL
Note
20
t
ENS
10
t
ENH
t
PAEsynch
t
CLKL
t
PAE
t
t
ENS
ENS
n+1 WORDS
N + 1 WORDS
IN FIFO
INFIFO
t
ENS
t
PAE
CY7C4425/4205/4215
CY7C4225/4235/4245
t
ENH
n WORDS IN FIFO
Note
22
t
PAEsynch
42X5–14
42X5–13