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CY7C199
Document #: 38-05160 Rev. ** Page 6 of 16
Switching Characteristics Over the Operating Range
[3,7]
(continued)
7C199-20 7C199-25 7C199-35 7C199-45
Parameter Description Min. Max. Min. Max. Min. Max. Min. Max. Unit
READ CYCLE
t
RC
Read Cycle Time 20 25 35 45 ns
t
AA
Address to Data Valid 20 25 35 45 ns
t
OHA
Data Hold from Address
Change
33 3 3 ns
t
ACE
CE LOW to Data Valid 20 25 35 45 ns
t
DOE
OE LOW to Data Valid 9 10 16 16 ns
t
LZOE
OE LOW to Low Z
[8]
00 0 0 ns
t
HZOE
OE HIGH to High Z
[8, 9]
9111515ns
t
LZCE
CE LOW to Low Z
[8]
33 3 3 ns
t
HZCE
CE HIGH to High Z
[8, 9]
9111515ns
t
PU
CE LOW to Power-Up 0 0 0 0 ns
t
PD
CE HIGH to Power-Down 20 20 20 25 ns
WRITE CYCLE
[10,11]
t
WC
Write Cycle Time 20 25 35 45 ns
t
SCE
CE LOW to Write End 15 18 22 22 ns
t
AW
Address Set-Up to Write End 15 20 30 40 ns
t
HA
Address Hold from Write End 0 0 0 0 ns
t
SA
Address Set-Up to Write Start 0 0 0 0 ns
t
PWE
WE Pulse Width 15 18 22 22 ns
t
SD
Data Set-Up to Write End 10 10 15 15 ns
t
HD
Data Hold from Write End 0 0 0 0 ns
t
HZWE
WE LOW to High Z
[9]
10 11 15 15 ns
t
LZWE
WE HIGH to Low Z
[8]
33 3 3 ns
Switching Waveforms
Read Cycle No. 1
[12, 13]
Notes:
12. Device is continuously selected. OE
, CE = V
IL
.
13. WE
is HIGH for read cycle.
ADDRESS
DATA OUT PREVIOUS DATA VALID
DATA VALID
t
RC
t
AA
t
OHA
C199–8