M41T81SMY6E STMicroelectronics, M41T81SMY6E Datasheet - Page 7

• Manufacturer Part Number: M41T81SMY6E
• Description: IC RTC SER W/ALARMS 18-SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T81SMY6E

• Memory Size: 20B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M41T81S
Table 1.
1. For SO8 package only.
2. NC and NF pins should be tied to V
Figure 2.
1. Open drain output
Figure 3.
1. NC and NF pins should be tied to V
2. Open drain output
IRQ/OUT/FT/SQW
internally shorted together.
XO
NC
NF
V
SDA
SCL
XI
V
V
BAT
CC
SS
(1)
(2)
(1)
(2)
Signal names
8-pin SOIC (M) connections
18-pin, 300 mil SOIC (MY) connections
Oscillator input
Oscillator output
Interrupt / output driver / frequency test / square wave (open drain)
Serial data input/output
Serial clock input
Battery supply voltage
Supply voltage
Ground
No connect
No function
Doc ID 10773 Rev 6
NF
NF (1)
SS
SS
V
V
V
V
XO
BAT
BAT
NC
NC
NC
NC
NC
.
SS
(1)
. Pins 2 and 3 are internally shorted together. Pins 17 and 16 are
XI
SS
1
2
3
4
1
2
3
4
5
6
7
8
9
M41T81S
M41T81S
18
17
16
15
14
13
12
11
10
5
8
7
6
V
IRQ/FT/OUT/SQW
SCL
SDA
NC
NF
NF
V CC
NC
IRQ/FT/OUT/SQW
NC
SCL
SDA
CC
(1)
(1)
(1)
(2)
Description
AI09162
AI09161
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