WCFS1008V1C
Data Retention Characteristics Over the Operating Range
Parameter
Description
VCC for Data Retention
Conditions
Min.
2.0
0
Max.
Unit
V
VDR
No input may exceed VCC + 0.5V
VCC = VDR = 2.0V,
CE > VCC – 0.3V,
[3]
tCDR
Chip Deselect to Data Retention Time
Operation Recovery Time
ns
tR
200
µs
VIN > VCC – 0.3V or VIN < 0.3V
Data Retention Waveform
DATA RETENTION MODE
3.0V
3.0V
V
DR
> 2V
V
CC
t
t
R
CDR
CE
Switching Waveforms
Read Cycle No. 1[9, 10]
t
RC
ADDRESS
t
AA
t
OHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
Read Cycle No. 2 (OE Controlled)[10, 11]
ADDRESS
CE
t
RC
t
ACE
OE
t
HZOE
t
DOE
t
HZCE
t
LZOE
HIGH
IMPEDANCE
HIGH IMPEDANCE
DATA OUT
DATA VALID
t
LZCE
t
PD
ICC
ISB
t
PU
V
CC
50%
50%
SUPPLY
CURRENT
Notes:
9. Device is continuously selected. OE, CE = VIL.
10. WE is HIGH for read cycle.
11. Address valid prior to or coincident with CE transition LOW.
4
WEIDA [ WEIDA SEMICONDUCTOR, INC. ]
