m41t83 STMicroelectronics, m41t83 Datasheet - Page 31

• Manufacturer Part Number: m41t83
• Description: Serial I 2c Bus Rtc With Battery Switchover
• Manufacturer: STMicroelectronics

Figure 17. Crystal accuracy across temperature
Table 7.
1. C
2. Maximum negative calibration value
3. Maximum positive calibration value
Addr
12h
LOAD
Frequency (ppm)
calibration
9.75pF
= 1/(1/C
–18pF
Analog
–100
–120
–140
–160
value
–7pF
0pF
3pF
5pF
–20
–40
–60
–80
Analog calibration values
20
0
(2))
(3)
XI
–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)
AC3
= –0.036 ppm/ C
D3
20
1
0
1
0
0
1
(1pF)
T
30
AC2
D2
O
0
1
1
1
1
0
= 25 C ± 5 C
O
)
2
40
2
(0.5pF)
± 0.006 ppm/ C
AC1
D1
0
0
0
0
1
0
50
(0.25pF)
AC0
60
D0
0
0
0
0
1
0
2
70
34.75pF
25pF
28pF
30pF
18pF
C
C
7pF
XO
XI
80
,
AI07888
½(C
C
12.5pF
17.4pF
LOAD
3.5pF
14pF
15pF
9pF
XI
, C
31/58
(1)
XO
)