m41t81 STMicroelectronics, m41t81 Datasheet - Page 24

• Manufacturer Part Number: m41t81
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

DC and AC parameters
24/30
Table 11.
1.
2.
Table 12.
1.
2.
Figure 16. Bus timing requirements sequence
Sym
SDA
SCL
V
Symbol
SO
V
Valid for Ambient Operating Temperature: T
All voltages referenced to V
Valid for Ambient Operating Temperature: T
CC
t
t
PD
rec
fall time should not exceed 5mV/µs.
tBUF
Battery back-up switchover voltage
P
Power down/up AC characteristics
Power down/up trip points DC characteristics
SCL and SDA at V
SCL and SDA at V
SS
Parameter
S
.
Parameter
tHD:STA
tR
A
A
IH
IH
(1) (2)
= –40 to 85°C; V
= –40 to 85°C; V
before power down
after power Up
tLOW
tHIGH
(1) (2)
tF
CC
CC
= 2.0 to 5.5V (except where noted).
= 2.0 to 5.5V (except where noted).
tHD:DAT
V
BAT
tSU:DAT
Min
– 0.80 V
Min
10
0
BAT
SR
Typ
Typ
– 0.50 V
tSU:STA
tHD:STA
Max
BAT
Max
– 0.30
P
AI00589
M41T81
tSU:STO
Unit
nS
µS
Unit
V