Datasheet

DC and AC parameters M41T81S
26/32 Doc ID 10773 Rev 7
Table 11. Power down/up AC characteristics
Table 12. Power down/up trip points DC characteristics
Figure 17. Bus timing requirements sequence
Symbol Parameter
(1)(2)
1. V
CC
fall time should not exceed 5 mV/µs.
2. Valid for ambient operating temperature: T
A
= –40 to 85 °C; V
CC
= 2.7 to 5.5 V (except where noted).
Min Typ Max Unit
t
PD
SCL and SDA at V
IH
before power-down 0 - - nS
t
rec
SCL and SDA at V
IH
after power-up 10 - - µS
Sym Parameter
(1)(2)
1. All voltages referenced to V
SS
.
2. Valid for ambient operating temperature: T
A
= –40 to 85 °C; V
CC
= 2.7 to 5.5 V (except where noted).
Min Typ Max Unit
V
PFD
Power-fail deselect 2.5 2.6 2.7 V
Hysteresis 25 mV
V
SO
Battery backup switchover voltage
(V
CC
< V
BAT
; V
CC
< V
PFD
)
V
BAT
< V
PFD
V
BAT
V
V
BAT
> V
PFD
V
PFD
V
Hysteresis 40 mV
AI00589
SDA
P
tSU:STOtSU:STA
tHD:STA
SR
SCL
tSU:DAT
tF
tHD:DAT
tR
tHIGH
tLOW
tHD:STAtBUF
SP