CY7C138-25JC Cypress Semiconductor Corp, CY7C138-25JC Datasheet - Page 12

• Manufacturer Part Number: CY7C138-25JC
• Description: IC SRAM 32KBIT 25NS 68PLCC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C138-25JC

• 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: 0°C ~ 70°C
• Package / Case: 68-PLCC
• Density: 32Kb
• Access Time (max): 25ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Address Bus: 12b
• Package Type: PLCC
• Operating Temp Range: 0C to 70C
• Number Of Ports: 2
• Supply Current: 180mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 68
• Word Size: 8b
• Number Of Words: 4K
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1445

Switching Waveforms
Notes
Document #: 38-06037 Rev. *E
31. t
32. t
Left Side Sets INT
Right Side Clears INT
Right Side Sets INT
Left Side Clears INT
HA
INS
ADDRESS
ADDRESS
ADDRESS
ADDRESS
depends on which enable pin (CE
or t
INR
R/W
R/W
R/W
R/W
INT
INT
OE
CE
INT
CE
OE
CE
INT
CE
depends on which enable pin (CE
R
R
L
L
L
L
R
R
R
R
R
R
R
R
L
L
L
L
R
:
L
L
:
:
R
:
(continued)
L
or R/W
t
INS
t
INS
[32]
L
[32]
L
or R/W
) is deasserted first.
WRITE FFE
WRITE FFF
L
Figure 14. Interrupt Timing Diagrams
t
) is asserted last.
INR
t
WC
[32]
t
WC
t
INR
t
t
[32]
HA
HA
[31]
[31]
READ FFE
READ FFF
t
t
RC
RC
CY7C138, CY7C139
Page 12 of 17
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