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M41T81 Datasheet(PDF) 16 Page - STMicroelectronics |
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M41T81 Datasheet(HTML) 16 Page - STMicroelectronics |
16 / 30 page Clock operation M41T81 16/30 The IRQ/FT/OUT/SQW pin is an open drain output which requires a pull-up resistor to VCC for proper operation. A 500-10k resistor is recommended in order to control the rise time. The FT Bit is cleared on power-down. Figure 10. Crystal accuracy across temperature Figure 11. Clock calibration AI07888 –160 0 10203040506070 Frequency (ppm) Temperature °C 80 –10 –20 –30 –40 –100 –120 –140 –40 –60 –80 20 0 –20 = –0.036 ppm/ °C 2 ± 0.006 ppm/°C2 K ∆F = K x (T – T O) 2 F T O = 25°C ± 5°C AI00594B NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION |
Similar Part No. - M41T81_06 |
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Similar Description - M41T81_06 |
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