CY7C140 查看數據表（PDF） - Cypress Semiconductor
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CY7C140 Datasheet PDF : 19 Pages
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CY7C130/CY7C131
CY7C140/CY7C141
Switching Characteristics Over the Operating Range[6, 11] (continued)
7C131-15[3]
7C141-15
7C130-25[3]
7C131-25
7C140-25
7C141-25
7C130-30
7C131-30
7C140-30
7C141-30
Parameter
Description
Min. Max. Min. Max. Min. Max. Unit
BUSY/INTERRUPT TIMING
tBLA
BUSY LOW from Address Match
tBHA
BUSY HIGH from Address Mismatch[16]
tBLC
tBHC
BUSY LOW from CE LOW
BUSY HIGH from CE HIGH[16]
tPS
tWB[17]
Port Set Up for Priority
R/W LOW after BUSY LOW
tWH
R/W HIGH after BUSY HIGH
tBDD
BUSY HIGH to Valid Data
tDDD
Write Data Valid to Read Data Valid
tWDD
Write Pulse to Data Delay
INTERRUPT TIMING
15
20
20 ns
15
20
20 ns
15
20
20 ns
15
20
20 ns
5
5
5
ns
0
0
0
ns
13
20
30
ns
15
25
30 ns
Note 18
Note 18
Note 18 ns
Note 18
Note 18
Note 18 ns
tWINS
R/W to INTERRUPT Set Time
15
25
25 ns
tEINS
CE to INTERRUPT Set Time
15
25
25 ns
tINS
tOINR
tEINR
tINR
Address to INTERRUPT Set Time
OE to INTERRUPT Reset Time[16]
CE to INTERRUPT Reset Time[16]
Address to INTERRUPT Reset Time[16]
15
25
25 ns
15
25
25 ns
15
25
25 ns
15
25
25 ns
Shaded areas contain preliminary information.
Note:
16. These parameters are measured from the input signal changing, until the output pin goes to a high-impedance state.
17. CY7C140/CY7C141 only.
18. A write operation on Port A, where Port A has priority, leaves the data on Port B’s outputs undisturbed until one access time after one of the following:
BUSY on Port B goes HIGH.
Port B’s address is toggled.
CE for Port B is toggled.
R/W for Port B is toggled during valid read.
Switching Characteristics Over the Operating Range[6,11]
Parameter
Description
READ CYCLE
tRC
tAA
tOHA
tACE
tDOE
tLZOE
tHZOE
tLZCE
Read Cycle Time
Address to Data Valid[12]
Data Hold from Address Change
CE LOW to Data Valid[12]
OE LOW to Data Valid[12]
OE LOW to Low Z[9, 13, 14]
OE HIGH to High Z[9, 13, 14]
CE LOW to Low Z[9, 13, 14]
7C130-35
7C131-35
7C140-35
7C141-35
Min. Max.
35
35
0
35
20
3
20
5
7C130-45
7C131-45
7C140-45
7C141-45
7C130-55
7C131-55
7C140-55
7C141-55
Min. Max. Min. Max. Unit
45
55
ns
45
55 ns
0
0
ns
45
55 ns
25
25 ns
3
3
ns
20
25 ns
5
5
ns
Document #: 38-06002 Rev. *D
Page 6 of 19
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