It appears you have JavaScript disabled within your browser. Some functions on this page will not work unless you log in.

See an Error?

MCP7940NT-I/MS

Name: Microchip MCP7940NT-I/MS
Brand: Microchip Technology
SKU: 579-MCP7940NT-I/MS
Price: 0.77 EUR
Availability: InStock

Images are for reference only
See Product Specifications

Mouser No:

579-MCP7940NT-I/MS

Mfr. No:

MCP7940NT-I/MS

Mfr.:

Microchip Technology

Description:

Real Time Clock I2C GP RTCC 64B SRAM

View in Development Tools Selector

Datasheet:

MCP7940NT-I/MS Datasheet (PDF)

ECAD Model:

Download the free Library Loader to convert this file for your ECAD Tool. Learn more about the ECAD Model.

More Information

Learn more about Microchip Technology MCP7940NT-I/MS

In Stock: 3.331

Stock:: 3.331

Can Dispatch Immediately

An unexpected error occurred. Please try again later.
On Order:: 5.000

Expected 6/2/2026
Factory Lead Time:: 10

Weeks Estimated factory production time for quantities greater than shown.

Enter Quantity:

Minimum: 1 Multiples: 1

Unit Price:

-,-- €

Ext. Price:

-,-- €

Est. Tariff:

Packaging:

Full Reel (Order in multiples of 2500)

Cut Tape

MouseReel™ (+5,00 €)

Pricing (EUR)

Qty.	Unit Price	Ext. Price
Cut Tape / MouseReel™ ^†
	0,774 €	0,77 €
Full Reel (Order in multiples of 2500)
	0,774 €	1.935,00 €

† A MouseReel™ fee of 5,00 € will be added and calculated in your basket. All MouseReel™ orders are non-cancellable and non-returnable. ↩

Alternative Packaging

Mfr. Part No.:

MCP7940N-I/MS

Packaging:

Tube

Availability:

In Stock

Price:

0,77 €

Min:

.hidden-for-nojs { display: none; } .pull-right-nojs { justify-content: flex-end; }

Product Attribute	Attribute Value	Select Attribute
Manufacturer:	Microchip
Product Category:	Real Time Clock
RoHS:
RTC Bus Interface:	Serial 2-Wire, I2C
Date Format:	YY-MM-DD-dd
Time Format:	HH:MM:SS:hh (12 hr, 24 hr)
RTC Memory Size:	64 B
Package/Case:	MSOP-8
Battery Backup Switching:	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
Packaging:	Reel
Packaging:	Cut Tape
Packaging:	MouseReel
Brand:	Microchip Technology
Function:	Alarm, Calendar, Clock
Moisture Sensitive:	Yes
Product Type:	Real Time Clocks
Factory Pack Quantity:	2500
Subcategory:	Clock & Timer ICs
Unit Weight:	140 mg

Products found:

To show similar products, select at least one checkbox

Select at least one checkbox above to show similar products in this category.

Attributes selected: 0

Filter Document:

This functionality requires JavaScript to be enabled.

Compliance Codes

TARIC:: 8542399000
CNHTS:: 8542399000
CAHTS:: 8542390000
USHTS:: 8542390090
JPHTS:: 8542390990
MXHTS:: 8542399999
ECCN:: EAR99

Origin Classifications

Country of Origin:: Thailand
Assembly Country of Origin:: Not available
Country of Diffusion:: Not available

The country is subject to change at the time of shipment.

Real-Time Clocks

Microchip Real-Time Clocks are offered from basic low-cost devices to various mid-range devices. These highly integrated devices have a usable amount of non-volatile memory and a combination of features that are very effective when operating within a single battery-backed clock device. With I2C and SPI RTCCs, various applications can be supported with fewer features and lower performance.

Clock and Timing Solutions

Microchip Clock and Timing Solutions are an extensive clock and timing product portfolio for complex timing requirements in designs. Microchip's oscillator products offer low jitter and low power with quartz- or MEMS-based resonators. The clock generation line offers online configurability, single-chip and multiple-frequency clock tree solutions. The clock and data distribution product line includes buffers, logic translators and multiplexers.

Infotainment Applications

Microchip Technology Infotainment Applications include everything from re-routing due to traffic delays, to providing intuitive visual, auditory, and tactile interfaces. This includes interfaces to the vehicle's distributed and networked subsystems like air conditioning, drivetrain, and body controls. Browse and access a host of media and content or catch up on social media through the onboard connectivity options.

MCP7940N Real-Time Clock/Calendar (RTCC)

Microchip Technology MCP7940N Real-Time Clock/Calendar (RTCC) uses digital timing compensation for an accurate clock/calendar, a programmable output control for versatility, and a power sense circuit that automatically switches to the backup supply. Using a low-cost 32.768kHz crystal, it tracks time using several internal registers. For communication, the MCP7940N uses the I²C bus. The clock/calendar automatically adjusts for months with fewer than 31 days, including corrections for leap years. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator and settable alarm(s) to the second, minute, hour, or day of the week, date, or month. Using the programmable CLKOUT, frequencies of 32.768kHz, 8.192kHz and 4.096kHz and 1Hz can be generated from the external crystal. The device is fully accessible through the serial interface while V_CC is between 1.8V and 5.5V, but can operate down to 1.3V for timekeeping and SRAM retention only.