M41T81SM6F - ST Microelectronics

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

M41T81SM6F
Manufacturer

ST Microelectronics
ChipWorker Part#

CW9862044
Category

Real Time Clock IC
Package

SOIC-8
Description

Real Time Clock Serial 20Byte Clock/Calendar/Alarm/Timer/Interrupt 8Pin SO N T/R
Documentation

Datasheet

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M41T81SM6F Specifications

Attribute	Attribute Value

Part Number	M41T81SM6F
Manufacturer	ST Microelectronics
ChipWorker Part#	CW9862044
Category	Real Time Clock IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	SOIC-8
Supply Voltage (DC)	2.70V (min)
Number of Positions	8 Position
Power Dissipation	1000 mW
Memory Size	20 B
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Power Dissipation (Max)	1000 mW
Supply Voltage	2.7V ~ 5.5V
Supply Voltage (Max)	5.5 V
Supply Voltage (Min)	2.7 V
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Size-Length	5 mm
Size-Width	4 mm
Size-Height	1.65 mm
Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Active
Packaging	Cut Tape (CT)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17
ECCN Code	EAR99

Product Description

The M41T81SM6F is a low-power serial Real-time Clock (RTC) IC with a built-in 32.768kHz oscillator (external crystal controlled). 8 bytes of the SRAM are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. An additional 12 bytes of SRAM provide status/control of alarm, watchdog and square wave functions. Addresses and data are transferred serially via a two line, bidirectional I²C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. It has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the clock operations can be supplied by a small lithium button supply when a power failure occurs. Functions available to the user include a non-volatile, time-of-day clock/calendar, alarm interrupts, watchdog timer and programmable square wave output.
Counters for tenths/hundredths of seconds, minutes, hours, day, date, month, year and century
Oscillator stop detection (monitors clock operation)
0.6µA (typical) Ultralow battery supply current
2 to 5.5V Clock operating voltage
Power-down time-stamp (HT bit) which allows determination of time elapsed in battery backup
Battery low flag
Programmable alarm and interrupt function
Accurate programmable watchdog timer
Software clock calibration

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