CY7C109
CY7C1009
Data Retention Waveform
DATA RETENTION MODE
V
CC
4.5V
t
CDR
CE
109-5
V
DR
> 2V
4.5V
t
R
Switching Waveforms
Read Cycle No. 1
[10, 11]
t
RC
ADDRESS
t
AA
t
OHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
109–6
Read Cycle No. 2 (OE Controlled)
[11, 12]
ADDRESS
t
RC
CE
1
CE
2
t
ACE
OE
t
HZOE
t
DOE
DATA OUT
V
CC
SUPPLY
CURRENT
t
LZOE
HIGH IMPEDANCE
t
LZCE
t
PU
50%
t
HZCE
DATA VALID
t
PD
50%
ISB
109–7
HIGH
IMPEDANCE
ICC
Notes:
10. Device is continuously selected. OE, CE
1
= V
IL
, CE
2
= V
IH
.
11. WE is HIGH for read cycle.
12. Address valid prior to or coincident with CE
1
transition LOW and CE
2
transition HIGH.
Document #: 38-05032 Rev. **
Page 6 of 12
CYPRESS [ CYPRESS SEMICONDUCTOR ]
