CY7C139-25JXC Cypress Semiconductor Corp, CY7C139-25JXC Datasheet - Page 10

• Manufacturer Part Number: CY7C139-25JXC
• Description: IC SRAM 36KBIT 25NS 68PLCC
• Manufacturer: Cypress Semiconductor Corp

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

Document #: 38-06037 Rev. *B
Switching Waveforms
Busy Timing Diagram No. 1 (CE Arbitration)
Busy Timing Diagram No. 2 (Address Arbitration)
Note:
30. If t
CE
CE
Right Address Valid First:
Left Address Valid First:
ADDRESS
R
ADDRESS
L
PS
Valid First:
Valid First:
ADDRESS
ADDRESS
ADDRESS
ADDRESS
is violated, the busy signal will be asserted on one side or the other, but there is no guarantee on which side BUSY will be asserted.
BUSY
BUSY
BUSY
BUSY
CE
CE
CE
CE
L,R
L,R
R
R
R
R
L
L
L
L
R
R
L
L
(continued)
t
t
PS
PS
ADDRESS MATCH
ADDRESS MATCH
t
t
RC
RC
or t
or t
t
t
PS
PS
[30]
WC
WC
t
t
BLA
BLA
[30]
ADDRESS MATCH
ADDRESS MATCH
t
t
BLC
BLC
ADDRESS MISMATCH
ADDRESS MISMATCH
t
t
BHA
BHA
t
t
BHC
BHC
CY7C138
CY7C139
Page 10 of 16
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