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參數資料
| 型號： | M41T0 |
| 廠商： | 意法半導體 |
| 英文描述： | Serial Real-Time Clock(串行實時時鐘) |
| 中文描述： | 串行實時時鐘（串行實時時鐘） |
| 文件頁數： | 17/22頁 |
| 文件大?。?/td> | 181K |
| 代理商： | M41T0 |
M41T0
DC and AC parameters
17/22
Table 7.
Table 8.
DC characteristics
Sym
Parameter
Test condition
(1)
1.
Valid for Ambient Operating Temperature: T
A
= –40 to 85°C; V
CC
= 2.0 to 5.5V (except where noted).
At 25°C.
Min
Typ
Max
Unit
I
LI
Input leakage current
0V
≤
V
IN
≤
V
CC
0V
≤
V
OUT
≤
V
CC
±1
μA
I
LO
Output leakage current
±1
μA
I
CC1
Supply current
Frequency (SCL) =
400kHz
3.0V
35
55
μA
5.5V
130
200
μA
I
CC2(2)
2.
Supply current (standby)
All inputs = V
CC
– 0.2V
Frequency (SCL) = 0Hz
3.0V
0.9
1.2
μA
5.5V
31
μA
V
IL
Input low voltage
–0.3
0.3 V
CC
V
V
IH
Input high voltage
0.7 V
CC
V
CC
+
0.3
V
V
OL
Output low voltage
I
OL
= 3mA
0.4
V
Output low voltage
(open drain)
I
OL
= 10mA
0.4
V
Crystal electrical characteristics
Symbol
Parameter
(1)(2)
1.
These values are externally supplied. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127,
Tuning Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial
temperature operations. KDS can be contacted at kouhou@kdsj.co.jp or http://www.kdsj.co.jp for further
information on this crystal type.
2.
Load capacitors are integrated within the M41T0. Circuit board layout considerations for the 32.768kHz
crystal of minimum trace lengths and isolation from RF generating signals should be taken into account.
R
S
= 40k
Ω
when V
CC
≤
2.5V.
Min
Typ
Max
Unit
f
O
Resonant frequency
32.768
kHz
R
S
Series resistance
60
(3)
3.
K
Ω
C
L
Load capacitance
12.5
pF
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