CY7C0251-15AC Cypress Semiconductor Corp, CY7C0251-15AC Datasheet - Page 9

• Manufacturer Part Number: CY7C0251-15AC
• Description: IC SRAM 144KBIT 15NS 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C0251-15AC

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 144K (8K x 18)
• Speed: 15ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1159

Switching Waveforms
Document #: 38-06035 Rev. **
Read Cycle No. 3 (Either Port)
Read Cycle No. 2 (Either Port CE/OE Access)
Read Cycle No. 1 (Either Port Address Access)
CURRENT
Notes:
DATA OUT
18. R/W is HIGH for read cycles
19. Device is continuously selected CE = V
20. OE = V
21. Address valid prior to or coincident with CE transition LOW.
22. To access RAM, CE = V
ADDRESS
DATA OUT
ADDRESS
DATA OUT
UB or LB
LB or UB
CE and
CE
IL
I
OE
I
CC
SB
.
PREVIOUS DATA VALID
IL
, UB or LB = V
t
OHA
[18, 20, 21, 21, 22]
IL
IL
t
AA
and UB or LB = V
, SEM = V
t
PU
t
AA
t
t
LZCE
LZCE
IH
t
LZCE
. To access semaphore, CE = V
[18, 21, 22]
t
t
ACE
ABE
[18, 19, 20]
IL
t
LZOE
. This waveform cannot be used for semaphore reads.
t
t
RC
ACE
t
RC
t
DOE
IH
, SEM = V
DATA VALID
IL
.
DATA VALID
t
OHA
t
t
t
OHA
HZCE
PD
CY7C024/0241
CY7C025/0251
t
t
t
HZCE
HZCE
HZOE
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7C024–16
7C024–15
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