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M41T0

Part Number	M41T0
Manufacturer	ST Microelectronics
Description	Serial real-time clock
Published	Apr 29, 2005
Detailed Description	Features ■ Counters for seconds, minutes, hours, day, date, month, years, and century ■ 32 KHz crystal oscillator integr...
Datasheet	M41T0 PDF File

Overview

Features ■ Counters for seconds, minutes, hours, day, date, month, years, and century ■ 32 KHz crystal oscillator integrating load capacitance (12.
5 pF) providing exceptional oscillator stability and high crystal series resistance operation ■ Oscillator stop detection monitors clock operation ■ Serial interface supports I2C bus (400 kHz protocol) ■ Low standby current 0.
9 µA (typ at 3 V) ■ 2.
0 to 5.
5 V clock operating voltage ■ Special software programmable output ■ Operating temperature of –40 to 85 °C M41T0 Serial real-time clock 8 1 SO8 June 2011 Doc ID 9105 Rev 7 1/23 www.
st.
com 1 Contents Contents M41T0 1 Description .
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5 2 Operation .
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7 2.
1 2-wire bus characteristics .
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7 2.
1.
1 Bus not busy .
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7 2.
1.
2 Start data transfer .
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7 2.
1.
3 Stop data transfer .
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7 2.
1.
4 Data valid .
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8 2.
1.
5 Acknowledge .
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8 2.
2 READ mode .
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10 2.
3 WRITE mode .
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11 3 Clock operation .
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13 3.
1 Output driver pin .
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13 3.
2 Oscillator stop detection .
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