CY7C144-55JXCT Cypress Semiconductor Corp, CY7C144-55JXCT Datasheet - Page 13

• Manufacturer Part Number: CY7C144-55JXCT
• Description: CY7C144-55JXCT
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C144-55JXCT

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 64K (8K x 8)
• Speed: 55ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Switching Waveforms
Notes
Document #: 38-06034 Rev. *H
23. CE = HIGH for the duration of the above timing (both write and read cycle).
24. I/O
25. Semaphores are reset (available to both ports) at cycle start.
26. 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
2
0
SEM
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
R
t
t
PWE
SCE
= CE
t
Figure 11. Semaphore Contention
Data
SD
L
Cycle
= HIGH
t
Match
SPS
Match
t
IN
HA
Valid
t
HD
t
SWRD
t
SOP
t
SOP
Read Cycle
Valid Address
t
AA
[24, 25, 26]
t
ACE
t
DOE
Data
[23]
CY7C144 CY7C145
OUT
Valid
t
OHA
Page 13 of 23
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