CY7C199
[3,7]
Switching Characteristics Over the Operating Range
(continued)
7C199-20 7C199-25
Min. Max.
7C199-35
7C199-45
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
READ CYCLE
t
t
t
Read Cycle Time
20
3
25
3
35
3
45
3
ns
ns
ns
RC
Address to Data Valid
20
25
35
45
AA
Data Hold from Address
Change
OHA
t
t
t
t
t
t
t
t
CE LOW to Data Valid
OE LOW to Data Valid
20
9
25
10
35
16
45
16
ns
ns
ns
ns
ns
ns
ns
ns
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
[8]
OE LOW to Low Z
0
3
0
0
3
0
0
3
0
0
3
0
[8,9]
OE HIGH to High Z
9
9
11
11
20
15
15
20
15
15
25
[8]
CE LOW to Low Z
[8,9]
CE HIGH to High Z
CE LOW to Power-Up
CE HIGH to Power-Down
20
PD
[10,11]
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
Write Cycle Time
20
15
15
0
25
18
20
0
35
22
30
0
45
22
40
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
WC
CE LOW to Write End
SCE
AW
Address Set-Up to Write End
Address Hold from Write End
Address Set-Up to Write Start
WE Pulse Width
HA
0
0
0
0
SA
15
10
0
18
10
0
22
15
0
22
15
0
PWE
SD
Data Set-Up to Write End
Data Hold from Write End
HD
[9]
WE LOW to High Z
10
11
15
15
HZWE
LZWE
[8]
WE HIGH to Low Z
3
3
3
3
Switching Waveforms
[12, 13]
Read Cycle No. 1
t
RC
ADDRESS
t
AA
t
OHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
C199–8
Notes:
12. Device is continuously selected. OE, CE = VIL.
13. WE is HIGH for read cycle.
6
CYPRESS [ CYPRESS ]
