m41t93 STMicroelectronics, m41t93 Datasheet - Page 23

• Manufacturer Part Number: m41t93
• Description: Serial Spi Bus Rtc With Battery Switchover
• Manufacturer: STMicroelectronics

Figure 10. Crystal accuracy across temperature
Table 5.
1. C
2. Maximum negative calibration value
3. Maximum positive calibration value
Addr
12h
LOAD
Calibration
Frequency (ppm)
= 1/(1/C
9.75pF
–18pF
Analog
–100
–120
–140
–160
Value
–7pF
0pF
3pF
5pF
–20
–40
–60
–80
Analog calibration values
20
0
XI
(3)
(2)
–40
+ 1/C
ACS
XO
D7
(±)
–30
x
0
0
1
0
1
)
(16pF)
–20
AC6
D6
0
0
0
0
0
1
–10
(8pF)
AC5
D5
0
0
0
0
1
0
0
(4pF)
AC4
D4
0
0
1
1
0
0
10
Temperature C
F
K
F = K x (T – T
(2pF)
= –0.036 ppm/ C
20
AC3
D3
0
1
0
1
0
1
T
30
O
(1pF)
AC2
= 25 C ± 5 C
D2
O
0
1
1
1
1
0
)
2
40
2
± 0.006 ppm/ C
(0.5pF)
AC1
D1
0
0
0
0
1
0
50
60
(0.25pF)
AC0
2
D0
0
0
0
0
1
0
70
C
34.75pF
80
XI
25pF
28pF
30pF
18pF
7pF
AI07888
, C
XO
C
12.5pF
17.4pF
3.5pF
LOAD
14pF
15pF
9pF
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