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M41T66 数据表(PDF) 7 Page - STMicroelectronics

部件名 M41T66
功能描述  Serial access real-time clock with alarms
PDF  33 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41T66 数据表(HTML) 7 Page - STMicroelectronics

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M41T66
Description
7/33
Figure 4.
Hardware hookup for SuperCap™ backup operation
1.
Open drain
2.
For a crystal with a load capacitance (CL) of 12.5 pF, two parallel external 12.5 pF capacitors (C1 and C2)
must be added to achieve better clock accuracy.
3.
It can also be connected to another power supply.
4.
Due to the output buffer circuitry used for the SQW output, this pin must not be taken to a voltage greater
than VCC. Diode required on SQW pin for SuperCap™ (or battery) backup. Low threshold BAT42 diode
recommended.



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