CY7C135-25JXI Cypress Semiconductor Corp, CY7C135-25JXI Datasheet - Page 8

• Manufacturer Part Number: CY7C135-25JXI
• Description: CY7C135-25JXI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C135-25JXI

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 32K (4K x 8)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Switching Waveforms
Document #: 38-06038 Rev. *D
Notes
20. CE = HIGH for the duration of the above timing (both write and read cycle).
21. I/O
22. Semaphores are reset (available to both ports) at cycle start.
23. If t
A
A
A
SPS
0L
0R
0R
0
SEM
SEM
–A
R/W
SEM
I/O
–A
R/W
R/W
–A
= I/O
OE
is violated, it is guaranteed that only one side gains access to the semaphore.
2
2L
0
2R
R
R
L
L
0L
= LOW (request semaphore); CE
Figure 10. Timing Diagram of Semaphore Contention (CY7C1342 Only)
Figure 9. Semaphore Read After Write Timing, Either Side (CY7C1342 only)
t
SA
(continued)
VALID ADDRESS
t
AW
WRITE CYCLE
t
R
t
PWE
SCE
= CE
t
SD
DATA
t
MATCH
SPS
MATCH
L
= HIGH.
t
IN
HA
VALID
t
HD
t
SWRD
t
SOP
t
SOP
READ CYCLE
VALID ADDRESS
t
AA
t
DOE
t
ACE
DATA
CY7C135, CY7C135A
[21, 22, 23]
OUT
[20]
VALID
t
OHA
CY7C1342
Page 8 of 12
[+] Feedback