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M41T81M6F Datasheet(PDF) 5 Page - STMicroelectronics

Part # M41T81M6F
Description  Serial Access Real-Time Clock with Alarms
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T81M6F Datasheet(HTML) 5 Page - STMicroelectronics

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M41T81
Figure 5. 8-pin SOIC (M) Connections
Figure 6. 18-pin, 300mil SOIC (MY)
Connections
Figure 7. 28-pin, 300mil SOIC (MX)
Connections
Note: 1. No Connect (NC) pin for 28-pin SOIC, but should be con-
sidered to have indicated function in anticipation of re-
placement with 18-pin SOIC.
Figure 8. Block Diagram
2
3
45
6
8
7
1
IRQ/FT/OUT/SQW
SDA
VBAT
SCL
VSS
XO
XI
VCC
M41T81
AI04769
8
2
3
4
5
6
7
9
12
11
10
18
17
16
15
14
13
1
NC
NC
NC
NC
NC
NC
NC
SCL
SDA
VSS
VBAT
NC
NC
VCC
M41T81
IRQ/FT/OUT/SQW
NC
NC
NC
AI07830
8
2
3
4
5
6
7
9
10
11
12
13
14
22
21
20
19
18
17
16
15
28
27
26
25
24
23
1
NC
NC
NC
NC
NC
NC
NC
NC
IRQ/FT/OUT/SQW
NC
NC
NC
SCL
SDA
NC
VSS
VSS
VBAT
SCL
(1)
NC
NC
VCC
VCC
(1)
M41T81
IRQ/FT/OUT/SQW
(1)
NC
SDA
(1)
NC
NC
AI07805
REAL TIME CLOCK
CALENDAR
RTC W/ALARM
& CALIBRATION
WATCHDOG
SQUARE WAVE
IRQ/FT/OUT/SQW(1)
INTERNAL
POWER
WDF
SQWE
AFE
SDA
SCL
VCC
COMPARE
I2C
INTERFACE
32KHz
OSCILLATOR
VBAT
CRYSTAL
VSO(2)
Note 1. Open drain output
Note 2. VSO = VBAT – 0.5V (typ)
AI04616
WRITE
PROTECT


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