CY7C138 CYPRESS [Cypress Semiconductor], CY7C138 Datasheet - Page 5

• Manufacturer Part Number: CY7C138
• Description: 4K x 8/9 Dual-Port Static RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Switching Characteristics
READ CYCLE
t
t
t
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
t
t
BUSY TIMING
t
t
t
t
t
t
t
t
INTERRUPT TIMING
t
t
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
WC
SCE
AW
HA
SA
PWE
SD
HD
HZWE
LZWE
WDD
DDD
BLA
BHA
BLC
BHC
PS
WB
WH
BDD
INS
INR
Parameter
[11]
[11]
[14]
[12]
[12]
[9,10,11]
[9,10,11]
[9,10,11]
[9,10,11]
[10,11]
[10,11]
Read Cycle Time
Address to Data Valid
Output Hold From Address Change
CE LOW to Data Valid
OE LOW to Data Valid
OE Low to Low Z
OE HIGH to High Z
CE LOW to Low Z
CE HIGH to High Z
CE LOW to Power-Up
CE HIGH to Power-Down
Write Cycle Time
CE LOW to Write End
Address Set-Up to Write End
Address Hold From Write End
Address Set-Up to Write Start
Write Pulse Width
Data Set-Up to Write End
Data Hold From Write End
R/W LOW to High Z
R/W HIGH to Low Z
Write Pulse to Data Delay
Write Data Valid to Read Data Valid
BUSY LOW from Address Match
BUSY HIGH from Address Mismatch
BUSY LOW from CE LOW
BUSY HIGH from CE HIGH
Port Set-Up for Priority
R/W LOW after BUSY LOW
R/W HIGH after BUSY HIGH
BUSY HIGH to Data Valid
INT Set Time
INT Reset Time
[13]
[13]
Description
Over the Operating Range
Min.
15
15
12
12
12
10
13
7C138-15
7C139-15
3
3
3
0
2
0
0
3
5
0
Max.
Note
[8]
5
15
15
15
10
10
10
10
30
25
15
15
15
15
13
15
15
Min.
25
25
20
20
20
15
20
3
3
3
0
2
0
0
3
5
0
7C138-25
7C139-25
Max.
Note
25
25
15
15
15
25
15
50
30
20
20
20
20
13
25
25
Min.
35
35
30
30
25
15
30
7C138-35
7C139-35
3
3
3
0
2
0
0
3
5
0
Max.
Note
35
35
20
20
20
35
20
60
35
20
20
20
20
13
25
25
Min.
55
55
40
40
30
20
40
7C138-55
7C139-55
3
3
3
0
2
0
0
3
5
0
CY7C138
CY7C139
Max.
Note
55
70
45
55
55
25
25
25
25
40
40
40
35
13
30
30
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns