CY7C4225-25ASC Cypress Semiconductor Corp, CY7C4225-25ASC Datasheet - Page 7

• Manufacturer Part Number: CY7C4225-25ASC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4225-25ASC

• Density: 16Kb
• Word Size: 18b
• Sync/async: Synchronous
• Expandable: Yes
• Package Type: TQFP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• 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
Notes:
14. .t
15. The clocks (RCLK, WCLK) can be free-running during reset.
16. After reset, the outputs will be LOW if OE = 0 and three-state if OE = 1.
Read Cycle Timing
Reset Timing
REN, WEN,
Q
Q
rising edge of WCLK and the rising edge of RCLK is less than t
0
EF,PAE
FF,PAF,
WCLK
0 -
SKEW2
RCLK
–Q
WEN
REN
OE
EF
RS
Q
17
LD
HF
17
is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH during the current clock cycle. It the time between the
[15]
t
ENS
t
OLZ
(continued)
t
ENH
t
CLKH
t
t
A
REF
t
t
t
RSF
RSF
RSF
t
OE
t
RS
t
CLK
t
SKEW2
SKEW2
NO OPERATION
, then EF may not change state until the next RCLK edge.
[14]
t
CLKL
7
VALID DATA
t
RSR
t
REF
t
OHZ
CY7C4425/4205/4215
CY7C4225/4235/4245
OE=0
OE=1
[16]
42X5–7
42X5–8