All prices are in US dollars.
Digi-Key Part Number MCP7940N-I/SN-ND
Price Break Unit Price Extended Price
1 0.74000 0.74
25 0.68000 17.00
100 0.65000 65.00
Quantity Available Digi-Key Stock: 3,938
Can ship immediately

Manufacturer Standard Lead Time 10 Weeks
Manufacturer Part Number


Lead Free Status / RoHS Status Lead free / RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)

Quantity Item Number ? Customer Reference

When requested quantity exceeds displayed pricing table quantities, a lesser unit price may appear on your order.
You may submit a request for quotation on quantities which are greater than those displayed in the pricing table.

Datasheets MCP7940N
I²C™ & SPI Family Brochure
MCP7940N Errata
Product Photos 8-SOIC
Design Resources MCP794xx Reference Layout Gerber Files
PCN Design/Specification MCP7940N Datasheet Update 21/Mar/2014
MCP7940N Errata Update 18/Apr/2014
Datasheet Update 09/Mar/2015
Copper/Gold Wire Update 08/Apr/2015
PCN Assembly/Origin Assembly Site Addition 08/Apr/2015
Assembly Site Addition 08/Apr/2015
PCN Packaging Label and Packing Changes 23/Sep/2015
EDA / CAD Models ? Download from Accelerated Designs
Standard Package ? 100

Integrated Circuits (ICs)


Clock/Timing - Real Time Clocks

Series -
Packaging ? Tube?
Type Clock/Calendar
Features Alarm, Leap Year, Square Wave Output, SRAM
Memory Size 64B
Time Format HH:MM:SS (12/24 hr)
Date Format YY-MM-DD-dd
Interface I²C, 2-Wire Serial
Voltage - Supply 1.8 V ~ 5.5 V
Voltage - Supply, Battery 1.3 V ~ 5.5 V
Current - Timekeeping (Max) 1.2µA @ 3.3V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
Online Catalog Serial Address
Other Names MCP7940NISN
Alternate Package | This part is also available in the following packaging:
Digi-Key Part Number Manufacturer Part Number Manufacturer Packaging Quantity Available Unit Price Minimum Quantity
MCP7940NT-I/SNTR-ND MCP7940NT-I/SN Microchip Technology Tape & Reel (TR)? 0
0.65000 3,300
MCP7940NT-I/SNCT-ND MCP7940NT-I/SN Microchip Technology Cut Tape (CT)? 2,262 - Immediate
0.74000 1
MCP7940NT-I/SNDKR-ND MCP7940NT-I/SN Microchip Technology Digi-Reel®? 2,262 - Immediate
Digi-Reel® 1

Tape & Reel, Cut Tape and Digi-Reels are all derived from the same manufacturer’s part number. Inventory from Tape & Reel is used to fulfill Cut Tape and Digi-Reel orders and will impact the total quantity available.

Customers who are interested in this product are also interested in:
  • CR-1220/FCN - Panasonic - BSG | P279-ND DigiKey Electronics
  • CR-1220/FCN
  • Panasonic - BSG
  • Unit Price 1.33000
  • CFS-20632768DZBB - Citizen Finedevice Co Ltd | 300-8301-ND DigiKey Electronics
  • CFS-20632768DZBB
  • Citizen Finedevice Co Ltd
  • CRYSTAL 32.7680KHZ 6PF T/H
  • Unit Price 0.24000

03:04:52 7/1/2016