CY7C027V-25AI Cypress Semiconductor Corp, CY7C027V-25AI Datasheet - Page 10

• Manufacturer Part Number: CY7C027V-25AI
• Description: 3.3V 32KX16 ASYNC DUAL PORT SRAM
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C027V-25AI

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 512K (32K x 16)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Switching Waveforms
Timing Diagram of Semaphore Contention
Semaphore Read After Write Timing, Either Side
Notes:
34. CE = HIGH for the duration of the above timing (both write and read cycle).
35. I/O
36. Semaphores are reset (available to both ports) at cycle start.
37. If t
A
A
A
0R
0L
0
SPS
0R
SEM
SEM
–A
SEM
R/W
R/W
I/O
R/W
–A
–A
OE
= I/O
is violated, the semaphore will definitely be obtained by one side or the other, but which side will get the semaphore is unpredictable.
2
2L
2R
0
R
L
R
L
0L
= LOW (request semaphore); CE
t
SA
(continued)
VALID ADRESS
t
AW
R
= CE
WRITE CYCLE
t
t
PWE
SCE
t
L
SD
DATA
t
= HIGH.
MATCH
SPS
MATCH
[35, 36, 37]
t
IN
HA
VALID
[34]
t
HD
t
SWRD
10
t
SOP
t
SOP
READ CYCLE
t
SAA
VALID ADRESS
t
DOE
t
ACE
DATA
CY7C027V/028V
CY7C037V/038V
OUT
VALID
t
OHA