CY7C199
Switching Characteristics Over the Operating Range (-20, -25, -35, -45)[3, 7]
7C199-20 7C199-25
Min. Max. Min. Max.
20 20
7C199-35
Min. Max.
20
7C199-45
Min. Max.
25
Parameter
tPD
Description
Unit
CE HIGH to Power-down
ns
Write Cycle[10,11]
tWC
tSCE
tAW
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
CE LOW to Write End
Address Set-up to Write End
Address Hold from Write End
Address Set-up to Write Start
WE Pulse Width
tHA
tSA
0
0
0
0
tPWE
tSD
15
10
0
18
10
0
22
15
0
22
15
0
Data Set-up to Write End
Data Hold from Write End
WE LOW to High-Z[9]
tHD
tHZWE
tLZWE
10
11
15
15
WE HIGH to Low-Z[8]
3
3
3
3
Switching Waveforms
Read Cycle No. 1[12, 13]
t
RC
ADDRESS
t
AA
t
OHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
Read Cycle No. 2 [13, 14]
t
RC
CE
t
ACE
OE
t
t
HZOE
t
DOE
HZCE
t
LZOE
HIGH
IMPEDANCE
HIGH IMPEDANCE
DATA OUT
DATA VALID
t
LZCE
t
PD
t
PU
V
ICC
CC
SUPPLY
CURRENT
50%
50%
ISB
Notes:
12. Device is continuously selected. OE, CE = VIL.
13. WE is HIGH for read cycle.
14. Address valid prior to or coincident with CE transition LOW.
Document #: 38-05160 Rev. *A
Page 5 of 13
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