M41T81SMY6F Overview
In the 18-SOX, 18-SOIC with Crystal (7.5mm Width) package, real time clocks is embedded as a dependency.Tape & Reel (TR) is the package format.In this electrical RTC, the supply voltage is 2.7V~5.5V.Clock/Calendar is the type of electrical real time clock that is being used.As you can see from the diagram, this electronic component is mounted in the way of Surface Mount.There should be -40°C~85°C operating temperature.When operating, electronic time clocks are possible to ensure that Alarm, Leap Year, Square Wave Output, Watchdog Timer are maintained.When a transmission line is terminated with 18 terminations, it means that the RTC module that terminates the line matches its characteristic impedance.It should be noted that this RTC real time clock is being supplied with 5V voltage at the moment.A total of 18 pins are equipped with the RTCs.The family in which RTCs belongs are M41T81.A voltage of 2V~3.5V is supplied to this electrical digital time clock.The frequency of real time clocks' output should not exceed 0.032MHz.Mounting type Surface Mount is chosen for the RTC module.In order for it to be powered, it requires a power supply of 3/5V.There are 18 pins on it.When an input signal is received, 1 timers are used to output a signal at a preset time.
M41T81SMY6F Features
18-SOX, 18-SOIC with Crystal (7.5mm Width) package
18 terminations
18 pin count
3/5V power supplies

M41T81SMY6F Applications
There are a lot of STMicroelectronics
M41T81SMY6F Real Time Clocks applications.

Digital video camera
Printers
Copy machines
Mobile equipment
Battery powered devices
Printers and copiers
Electronic metering
Digital cameras
White goods
Elapsed time counter

Lifecycle Status	ACTIVE (Last Updated: 7 months ago)
Factory Lead Time	25 Weeks
Mount	Surface Mount
Mounting Type	Surface Mount
Package / Case	18-SOX, 18-SOIC with Crystal (7.5mm Width)
Number of Pins	18
Operating Temperature	-40°C~85°C
Packaging	Tape & Reel (TR)
JESD-609 Code	e3
Feature	Alarm, Leap Year, Square Wave Output, Watchdog Timer
Part Status	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	18
ECCN Code	EAR99
Type	Clock/Calendar
Terminal Finish	Matte Tin (Sn)
HTS Code	8542.39.00.01
Voltage - Supply	2.7V~5.5V
Terminal Position	DUAL
Peak Reflow Temperature (Cel)	240
Supply Voltage	5V
Terminal Pitch	1.27mm
Time@Peak Reflow Temperature-Max (s)	30
Base Part Number	M41T81
Pin Count	18
Power Supplies	3/5V
Interface	I2C, 2-Wire Serial
Clock Frequency	0.032MHz
Logic Function	Clock
Number of Timers	1
Time Format	HH:MM:SS:hh (24 hr)
Date Format	YY-MM-DD-dd
Current - Timekeeping (Max)	100μA @ 2.7V~5.5V
Time-Min	1/100SECOND
Interrupt Capability	Y
Voltage - Supply, Battery	2V~3.5V
Volatile	YES
Information Access Method	I2C
Length	11.61mm
Height Seated (Max)	2.69mm
Width	7.62mm
Radiation Hardening	No
RoHS Status	ROHS3 Compliant
Lead Free	Lead Free