CY7C4245-10AI Cypress Semiconductor Corp, CY7C4245-10AI Datasheet - Page 10

• Manufacturer Part Number: CY7C4245-10AI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4245-10AI

• 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: 50mA
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

Switching Characteristics
Switching Waveforms
Note
Document Number: 001-45652 Rev. **
t
t
t
t
t
t
t
18. t
HF
XO
XI
XIS
SKEW1
SKEW2
SKEW3
Parameter
the rising edge of RCLK and the rising edge of WCLK is less than t
SKEW1
WCLK
RCLK
–D
WEN
REN
FF
17
is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that FF will go HIGH during the current clock cycle. If the time between
Clock to Half-Full Flag
Clock to Expansion Out
Expansion in Pulse Width
Expansion in Set-up Time
Skew Time between Read Clock and Write Clock
for Full Flag
Skew Time between Read Clock and Write Clock
for Empty Flag
Skew Time between Read Clock and Write Clock
for Programmable Almost Empty and Program-
mable Almost Full Flags.
t
SKEW1
Description
Over the Operating Range (continued)
t
[18]
CLKH
t
WFF
t
CLK
Figure 6. Write Cycle Timing
t
DS
SKEW1
t
CLKL
t
ENS
, then FF may not change state until the next WCLK edge.
Min.
4.5
10
3
5
5
-10
Max.
t
DH
12
t
ENH
7
t
WFF
Min.
6.5
15
5
6
6
-15
Max.
16
10
NO OPERATION
CY7C4425/4205/4215
CY7C4225/4235/4245
Min.
10
10
10
10
18
-25
Max.
20
15
Min.
14
15
12
12
20
-35
Page 10 of 22
Max.
25
20
Unit
ns
ns
ns
ns
ns
ns
ns
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