CY7C025-55AC Cypress Semiconductor Corp, CY7C025-55AC Datasheet - Page 13

• Manufacturer Part Number: CY7C025-55AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C025-55AC

• Density: 128Kb
• Access Time (max): 55ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Address Bus: 12b
• Package Type: TQFP
• Operating Temp Range: 0C to 70C
• Number Of Ports: 2
• Supply Current: 230mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 100
• Word Size: 16b
• Number Of Words: 8K
• Lead Free Status / RoHS Status: Not Compliant

Switching Waveforms
Notes
Document #: 38-06035 Rev. *D
37. CE = HIGH for the duration of the above timing (both write and read cycle).
38. I/O
39. Semaphores are reset (available to both ports) at cycle start.
40. If t
A
SPS
A
A
0R
0R
0L
0
= I/O
SEM
SEM
is violated, the semaphore is definitely obtained by one side or the other, but which side gets the semaphore is unpredictable.
–A
SEM
R/W
R/W
I/O
R/W
–A
–A
OE
0L
2
2L
0
2R
R
L
R
L
= LOW (request semaphore); CE
t
SA
Figure 10. Timing Diagram of Semaphore Contention
Figure 9. Semaphore Read After Write Timing, Either Side
(continued)
VALID ADRESS
t
AW
R
= CE
WRITE CYCLE
t
t
PWE
SCE
t
L
SD
DATA
t
= HIGH.
MATCH
SPS
MATCH
t
IN
HA
VALID
t
HD
t
SWRD
t
SOP
t
SOP
READ CYCLE
t
AA
VALID ADRESS
t
DOE
t
ACE
[38, 39, 40]
[37]
DATA
CY7C024/024A/0241
OUT
VALID
CY7C025/0251
t
OHA
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