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See Technical Specifications

MCP7940MT-I/SN +BOM

I2C Real-Time Clock/Calendar with SRAM.

Manufacturer:

MICROCHIP
Mfr.Part #:

MCP7940MT-I/SN
Datasheet:

MCP7940MT-I/SN Datasheet (PDF)
RTC Bus Interface:

I2C, Serial
Date Format:

YY-MM-DD-dd
Time Format:

HH:MM:SS (12 hr, 24 hr)
RTC Memory Size:

64 B
EDA/CAD Models:

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MCP7940MT-I/SN General Description

The MCP7940M real-time clock/calendar is a cost-effective yet highly accurate solution for time tracking in your projects. Equipped with a digital trimming circuit and SRAM, this device provides the precision normally associated with higher-priced options. Whether you opt for a 32,768 kHz crystal or another clock source, this RTCC can maintain time in both 12-hour and 24-hour formats, complete with an AM/PM indicator. From seconds to years, it can track time across various units, ensuring comprehensive timekeeping functionality. The multifunction open drain output can be customized as an alarm or clock signal, offering versatility for your system requirements

Key Features

Hours, Minutes, Seconds, Day of Week, Day, Month, Year
Leap year compensated to 2399
12/24 hour modes
1 PPM Resolution
±129 PPM Range
Dual Programmable Alarms
Clock output with selectable frequency
Alarm output
General Purpose output
64 Bytes SRAM
I2C Clock Frequency up to 400 kHz
Operating Voltage 1.8V to 5.5V
Low Typical Timekeeping Current

Specifications

Product Category	Real Time Clock	RTC Bus Interface	I2C, Serial
Date Format	YY-MM-DD-dd	Time Format	HH:MM:SS (12 hr, 24 hr)
RTC Memory Size	64 B	Battery Backup Switching	No Backup Switching
Supply Voltage - Min	1.8 V	Supply Voltage - Max	5.5 V
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT	Function	Calendar, Clock
Moisture Sensitive	Yes	Product Type	Real Time Clocks
Factory Pack Quantity	3300	Subcategory	Clock & Timer ICs
Unit Weight	0.019048 oz