CY7C144-55AC Cypress Semiconductor Corp, CY7C144-55AC Datasheet - Page 12

• Manufacturer Part Number: CY7C144-55AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C144-55AC

• Density: 64Kb
• Access Time (max): 55ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Address Bus: 13b
• Package Type: TQFP
• Operating Temp Range: 0C to 70C
• Number Of Ports: 2
• Supply Current: 160mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Word Size: 8b
• Number Of Words: 8K
• Lead Free Status / Rohs Status: Not Compliant

Switching Waveforms
Notes
Document #: 38-06034 Rev. *G
24. CE = HIGH for the duration of the above timing (both write and read cycle).
25. I/O
26. Semaphores are reset (available to both ports) at cycle start.
27. If t
A
SPS
0R
0
SEM
A
A
R/W
I/O
A
= I/O
OE
0R
is violated, the semaphore will definitely be obtained by one side or the other, but there is no guarantee which side will control the semaphore.
0L
SEM
SEM
2
0
A
R/W
A
R/W
0L
2R
2L
= LOW (request semaphore); CE
R
L
L
R
t
SA
Figure 10. Semaphore Read After Write Timing, Either Side
(continued)
VALID ADDRESS
t
AW
WRITE CYCLE
R
t
t
PWE
SCE
= CE
t
Figure 11. Semaphore Contention
DATA
SD
L
= HIGH
t
MATCH
SPS
MATCH
t
IN
HA
VALID
t
HD
t
SWRD
t
SOP
t
SOP
READ CYCLE
VALID ADDRESS
t
AA
[25, 26, 27]
t
ACE
t
DOE
DATA
[24]
CY7C144, CY7C145
OUT
VALID
t
OHA
Page 12 of 21