CY7C025AV-20AC Cypress Semiconductor Corp, CY7C025AV-20AC Datasheet - Page 13

• Manufacturer Part Number: CY7C025AV-20AC
• Description: IC SRAM 128KBIT 20NS 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C025AV-20AC

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 128K (8K x 16)
• Speed: 20ns
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1161

Document #: 38-06052 Rev. *B
Switching Waveforms
Timing Diagram of Semaphore Contention
Semaphore Read After Write Timing, Either Side
Notes:
41. CE = HIGH for the duration of the above timing (both write and read cycle).
42. I/O
43. Semaphores are reset (available to both ports) at cycle start.
44. If t
A
A
A
0R
0L
0
SPS
0R
SEM
SEM
–A
R/W
SEM
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
0
2R
R
L
L
R
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
[42, 43, 44]
t
IN
HA
VALID
[41]
t
HD
t
SWRD
t
SOP
t
SOP
READ CYCLE
t
SAA
CY7C0241AV/0251AV/036AV
VALID ADRESS
t
DOE
CY7C024AV/025AV/026AV
t
ACE
DATA
OUT
VALID
t
OHA
Page 13 of 19