help desk software
ALTERNATIVE PRODUCTS
Alternative Packaging
MCP7940NT-I/SN
MCP7940NT-I/SN
In Stock: 1,960
Minimum Order: 250
VIEW PRODUCT
MCP7940N-I/SN by microchip technology
Image is representational - see manufacturer specifications
Microchip Technology Authorized Distributor

MCP7940N-I/SN

Battery-Backed I2C Real-Time Clock/Calendar - 64-byte SRAM - 1.8 to 5.5VDC - 12/24 hour - I2C - -40°C to +85°C - 8-lead SOIC ...

View Datasheet
RoHS Compliant
TUBE Packaging
Accessories
Request Programming Quote
Certificate of Compliance

DESCRIPTION

The MCP7940N series of low-power Real-Time Clocks (RTC) 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 32.768 kHz 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, day of the week, date or month. Using the programmable CLKOUT, frequencies of 32.768, 8.192 and 4.096 kHz and 1 Hz can be generated from the external crystal. The device is fully accessible through the serial interface while VCC is between 1.8V and 5.5V, but can operate down to 1.3V for timekeeping and SRAM retention only.

Search Keywords: MCP7940NISN

SPECIFICATIONS

Product Attribute
Attribute Value
Select Attribute
Products found: 0
Supplier:
Microchip Technology
Part No:
MCP7940N-I/SN
Unit of Measure:
Per Each
RoHS:
Yes
HTS:
8542390090
COO:
TH
ECCN:
EAR99
Supplier Standard Pack: This information is provided for customers who prefer to buy in multiples of the Manufacturer’s Standard Package quantity. Minimum Order Quantities and Required Order Multiples are presented with our price and availability information.
100
Package Type:
TUBE
Maximum Power Dissipation:
N/A
Dimension:
4.9 x 3.9 x 1.25(Min) mm
Maximum Access Time:
N/A
Minimum Operating Supply Voltage:
1.8 V
Maximum Operating Supply Voltage:
5.5 V
Function:
Clock/Calendar/Alarm/Battery Backup
Family:
MCP7940
Mounting:
Surface Mount
Bus Type:
Serial (2-Wire, I2C)
Date Format:
DW:DM:M:Y

FREQUENTLY ASKED QUESTIONS

Is MCP7940N-I/SN RoHS compliant?

Yes, MCP7940N-I/SN is RoHS compliant.

What is the lead time for MCP7940N-I/SN?

The standard lead time for MCP7940N-I/SN is approximately 6 days. In-stock quantities ship from Master Electronics.

  Different packaging options available.  See Alternatives

IN STOCK: 200

Can Ship immediately

Manufacturer Stock: 50,511   can ship 9/21/26

On Order: 500   can ship 9/23/26 

Minimum Order Quantity: 100

Multiple: 100

Factory Lead-Time 6 Weeks can ship 10/19/26  

Price (USD)

Qty
Unit Price
100
$0.857
300
$0.822
500
$0.811
1,000
$0.779
2,500
$0.741
5,000
$0.739
7,500
$0.737
10,000 +
$0.732
Supplier's Standard Package
Log in for special pricing Click for Quote Price Match Request

Tools/3D Models

Product Guides