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M41T93 数据表(PDF) 23 Page - STMicroelectronics

部件名 M41T93
功能描述  Serial SPI bus RTC with battery switchover
PDF  51 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41T93 数据表(HTML) 23 Page - STMicroelectronics

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M41T93
Clock operation
23/51
Figure 10.
Crystal accuracy across temperature
Table 5.
Analog calibration values
Addr
Analog
calibration
value
D7
D6
D5
D4
D3
D2
D1
D0
CXI, CXO CLOAD
(1)
1.
CLOAD = 1/(1/CXI + 1/CXO)
ACS
(±)
AC6
(16 pF)
AC5
(8 pF)
AC4
(4 pF)
AC3
(2 pF)
AC2
( 1pF)
AC1
(0.5 pF)
AC0
(0.25 pF)
12h
0 pF
x
0
0000
0
0
25 pF
12.5 pF
3 pF
0
0
0011
0
0
28 pF
14 pF
5 pF
0
0
0101
0
0
30 pF
15 pF
–7 pF
1
0
0111
0
0
18 pF
9 pF
9.75 pF(2)
2.
Maximum negative calibration value
0
0
1001
1
1
34.75 pF
17.4 pF
–18 pF(3)
3.
Maximum positive calibration value
1
1
0010
0
0
7 pF
3.5 pF
AI07888
–160
0
10203040506070
Frequency (ppm)
Temperature
°C
80
–10
–20
–30
–40
–100
–120
–140
–40
–60
–80
20
0
–20
= –0.036 ppm/
°C
2 ± 0.006 ppm/°C2
K
ΔF
= K x (T – T
O)
2
F
T
O = 25°C ± 5°C



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