M41T00AUD
DC and AC parameters
37/44
Figure 18.
Power down/up mode AC waveforms
Table 14.
RTC power down/up AC characteristics
Symbol
Parameter
(1)(2)
1.
Valid for ambient operating temperature: T
A
= 0 to 70°C; V
CC
= 3.0 to 3.6V (except where otherwise
noted).
2.
V
CC
fall time should not exceed 5mV/µs.
Min
Typ
Max
Unit
t
PD
SCL and SDA at VIH before power down
0
ns
t
rec
SCL and SDA at VIH after power up
10
µs
Table 15.
RTC power down/up trip points DC characteristics
Symbol
Parameter
(1)(2)
1.
All voltages referenced to V
SS
.
2.
Valid for ambient operating temperature: T
A
= 0 to 70°C; V
CC
= 3.0 to 3.6V (except where otherwise
noted).
Min
Typ
Max
Unit
V
PFD
Power-fail deselect
2.60
2.8
2.95
V
Hysteresis
10
mV
V
SO
Back-up switchover voltage
(V
CC
< V
BACK
; V
CC
< V
PFD
)
2.0 < V
BACK
< V
PFD
V
BACK
V
V
BACK
> V
PFD
V
PFD
V
Hysteresis 10
mV
AI00596
VCC
tREC
tPD
VSO
SDA
SCL
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