Cypress CY7C1399B - Manual (Page 6)

CY7C1399B
Document #: 38-05071 Rev. *A Page 6 of 10
Data Retention Waveform
3.0V 3.0V
t
CDR
V
DR
> 2V
DATA RETENTION MODE
t
R
CE
V
CC
Switching Waveforms
Notes:
10. Device is continuously selected. OE, CE = V
IL
.
11. WE is HIGH for read cycle.
12. Address valid prior to or coincident with CE transition LOW.
ADDRESS
DATA OUT PREVIOUS DATA VALID DATA VALID
t
RC
t
AA
t
OHA
Read Cycle No. 1
[10, 11]
50% 50%
DATA VALID
t
RC
t
ACE
t
DOE
t
LZOE
t
LZCE
t
PU
DATA OUT
HIGH IMPEDANCE IMPEDANCE
ICC
ISB
t
HZOE
t
HZCE
t
PD
OE
CE
HIGH
V
CC
SUPPLY
CURRENT
Read Cycle No. 2
[11, 12]