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參數(shù)資料
| 型號(hào)： | M41T11MH6F |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Serial Real Time Clock with 56 Bytes of NVRAM |
| 中文描述： | 串行實(shí)時(shí)時(shí)鐘與56字節(jié)的NVRAM |
| 文件頁數(shù)： | 20/29頁 |
| 文件大?。?/td> | 154K |
| 代理商： | M41T11MH6F |
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DC and AC parameters
M41T11
20/29
Table 6.
Table 7.
Table 8.
Capacitance
Symbol
Parameter
(1)(2)
1.
Effective capacitance measured with power supply at 5V; sampled only, not 100% tested.
2.
At 25°C, f = 1MHz.
Min
Max
Unit
C
IN
Input capacitance (SCL)
7
pF
C
OUT(3)
3.
Outputs deselected.
Output capacitance (SDA, FT/OUT)
10
pF
t
LP
Low-pass filter input time constant (SDA and SCL)
250
1000
ns
DC characteristics
Symbol
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).
STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.
After switchover (V
SO
), V
BAT
(min) can be 2.0V for crystal with R
S
= 40K
.
For rechargeable back-up, V
BAT
(max) may be considered V
CC
.
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
Switch frequency = 100kHz
300
μA
I
CC2
Supply current (standby)
SCL, SDA = V
CC
– 0.3V
70
μA
V
IL
Input low voltage
–0.3
0.3V
CC
V
V
IH
Input high voltage
0.7V
CC
V
CC
+ 0.5
V
V
OL
Output low voltage
I
OL
= 3mA
0.4
V
Pull-up supply voltage
(open drain)
FT/OUT
5.5
V
V
BAT(2)
2.
Battery supply voltage
2.5
(3)
3.
3
3.5
(4)
4.
V
I
BAT
Battery supply current
T
A
= 25°C, V
CC
= 0V,
oscillator ON, V
BAT
= 3V
0.8
1
μA
Crystal electrical characteristics
Symbol
Parameter
(1)(2)(3)
1.
These values are externally supplied if using the SO8 package. 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 M41T11. Circuit board layout considerations for the 32.768kHz
crystal of minimum trace lengths and isolation from RF generating signals should be taken into account.
All SNAPHAT
battery:crystal tops meet these specifications.
3.
Min
Typ
Max
Unit
f
O
Resonant frequency
32.768
kHz
R
S
Series resistance
60
k
C
L
Load capacitance
12.5
pF
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