M41ST85W_11 STMICROELECTRONICS [STMicroelectronics], M41ST85W_11 Datasheet - Page 22

• Manufacturer Part Number: M41ST85W_11
• Description: 3.0/3.3 V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Clock operation
Figure 13. Crystal accuracy across temperature
Figure 14. Calibration waveform
22/43
Frequency (ppm)
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
–100
–120
–140
–160
–20
–40
–60
–80
20
0
–40
–30
–20
–10
0
Doc ID 7531 Rev 11
10
Temperature C
F
K
F = K x (T – T
= –0.036 ppm/ C
20
T
30
O
= 25 C ± 5 C
O
)
2
40
2
± 0.006 ppm/ C
50
60
2
70
80
AI07888
AI00594B
M41ST85W