M41ST85Y Datasheet, PDF (16/34 Pages) STMicroelectronics – 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR

M41ST85Y, M41ST85W
Figure 15. Crystal Accuracy Across Temperature
Frequency (ppm)
20
0
–20
–40
–60
–80
–100
–120
–140
–160
–40 –30 –20 –10 0
∆F
F
=
K
x
(T
–
T_O)²
K = –0.036 ppm/°C² ± 0.006 ppm/°C²
T_O = 25°C ± 5°C
10 20 30 40 50 60 70 80
Temperature °C
AI07888
Figure 16. Calibration Waveform
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
AI00594B
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