m41t81s STMicroelectronics, m41t81s Datasheet - Page 25

• Manufacturer Part Number: m41t81s
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

Table 11.
1. V
2. Valid for Ambient Operating Temperature: T
Table 12.
1. All voltages referenced to V
2. Valid for Ambient Operating Temperature: T
Figure 17. Bus timing requirements sequence
V
Sym
V
Symbol
PFD
SO
CC
t
t
PD
rec
fall time should not exceed 5mV/µs.
Power-fail Deselect
Hysteresis
Battery Back-up Switchover Voltage
(V
Hysteresis
CC
Power down/up AC characteristics
Power down/up trip points DC characteristics
< V
SDA
SCL
SCL and SDA at V
BAT
SCL and SDA at V
; V
tBUF
CC
Parameter
P
< V
Parameter
SS
.
PFD
S
)
IH
(1)and(2)
before Power Down
IH
tHD:STA
tR
(1)and(2)
after Power Up
A
A
tLOW
tHIGH
= –40 to 85°C; V
= –40 to 85°C; V
tF
V
V
V
V
BAT
PFD
BAT
PFD
<
>
tHD:DAT
tSU:DAT
CC
CC
= 2.7 to 5.5V (except where noted).
= 2.7 to 5.5V (except where noted).
Min
Min
2.5
10
0
SR
tSU:STA
Typ
V
tHD:STA
V
Typ
2.6
25
40
PFD
BAT
P
AI00589
Max
tSU:STO
Max
2.7
Unit
nS
µS
Unit
mV
mV
25/31
V
V
V