M41T64(2004) 데이터 시트보기 (PDF) - STMicroelectronics

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M41T64
(Rev.:2004)

Serial Access Real-Time Clock with Alarms

STMicroelectronics 

M41T62/63/64/65

Figure 20. 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

–

TO)2

K = –0.036 ppm/°C2 ± 0.006 ppm/°C2

TO = 25°C ± 5°C

10 20 30 40 50 60 70 80

Temperature °C

AI07888

Figure 21. Calibration Waveform

NORMAL

POSITIVE

CALIBRATION

NEGATIVE

CALIBRATION

AI00594B

18/31

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