CY7C139-25JXC Cypress Semiconductor Corp, CY7C139-25JXC Datasheet - Page 8
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CY7C139-25JXC
Manufacturer Part Number
CY7C139-25JXC
Description
IC SRAM 36KBIT 25NS 68PLCC
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.CY7C138-15JXC.pdf
(16 pages)
Specifications of CY7C139-25JXC
Format - Memory
RAM
Memory Type
SRAM - Dual Port, Asynchronous
Memory Size
36K (4K x 9)
Speed
25ns
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CY7C139-25JXC
Manufacturer:
Cypress Semiconductor Corp
Quantity:
10 000
Document #: 38-06037 Rev. *B
Switching Waveforms
Write Cycle No. 2: R/W Three-States Data I/Os (Either Port)
Semaphore Read After Write Timing, Either Side
Notes:
25. Data I/O pins enter high impedance when OE is held LOW during write.
26. CE = HIGH for the duration of the above timing (both write and read cycle).
SEM OR CE
DATA OUT
ADDRESS
DATA IN
A
0
SEM
–A
R/W
R/W
I/O
OE
2
0
t
SA
(continued)
VALID ADDRESS
t
AW
t
SA
WRITE CYCLE
t
t
PWE
SCE
t
SD
DATA
t
IN
HA
VALID
t
[26]
t
SCE
HD
t
AW
t
HZWE
t
WC
t
SWRD
[22, 24, 25]
t
PWE
t
SOP
t
SOP
READ CYCLE
t
t
SD
AA
VALID ADDRESS
HIGH IMPEDANCE
DATA VALID
t
ACE
t
DOE
t
HD
t
LZWE
DATA
t
HA
OUT
VALID
t
OHA
CY7C138
CY7C139
Page 8 of 16
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