-
Products
Back
- New Products
-
Automation & Control
Back
- Accessories
- Controllers - Accessories
- Controllers - PLC Modules
- Controllers - Process, Temperature
- Controllers - Programmable Logic (PLC)
- Human Machine Interface (HMI)
- Industrial Equipment
- Machine Vision - Cameras/Sensors
- Monitor - Current/Voltage Transducer
- Panel Meters
- Panel Meters - Counters, Hour Meters
- Pneumatics, Hydraulics
- Time Delay Relays
- See All
PLC Modules -
Cables, Wires
Back
-
Cable Assemblies
Back
- Barrel - Power Cables
- Between Series Adapter Cables
- Circular Cable Assemblies
- Coaxial Cables (RF)
- D-Shaped, Centronics Cables
- D-Sub Cables
- Flat Flex Cables (FFC, FPC)
- Flat Flex, Ribbon Jumper Cables
- Jumper Wires, Pre-Crimped Leads
- Modular Cables
- Pluggable Cables
- Power, Line Cables and Extension Cords
- Rectangular Cable Assemblies
- USB Cables
- See All
-
Cables, Wires - Management
Back
- Accessories
- Bushings, Grommets
- Cable and Cord Grips
- Cable Supports and Fasteners
- Cable Ties - Holders and Mountings
- Cable Ties and Cable Lacing
- Grounding Braid, Straps
- Heat Shrink Boots, Caps
- Heat Shrink Tubing
- Labels, Labeling
- Protective Hoses, Solid Tubing, Sleeving
- Solder Sleeve
- Spiral Wrap, Expandable Sleeving
- Wire Ducts, Raceways
- See All
- Coaxial Cables (RF)
- Fiber Optic Cables
- Flat Flex Cables (FFC, FPC)
- Flat Ribbon Cables
- Modular - Flat Cable
- Multiple Conductor Cables
- Single Conductor Cables (Hook-Up Wire)
- Wire Wrap
- See All
Multiple Conductor Cables -
Cable Assemblies
-
Circuit Protection
Back
- Accessories
- Circuit Breakers
- Electrical, Specialty Fuses
- Fuseholders
- Fuses
- Gas Discharge Tube Arresters (GDT)
- Inrush Current Limiters (ICL)
- PTC Resettable Fuses
- Surge Suppression ICs
- Thermal Cutoffs (Thermal Fuses)
- TVS - Diodes
- TVS - Mixed Technology
- TVS - Thyristors
- TVS - Varistors, MOVs
PTC Resettable Fuses -
Connectors
Back
- Backplane Connectors
- Barrel Connectors
- Circular Connectors
- Coaxial Connectors (RF)
- D-Sub, D-Shaped Connectors
- FFC, FPC (Flat Flexible) Connectors
- Modular Connectors
- Power Entry Connectors
- Rectangular Connectors
- Terminal Blocks
- Terminals
- USB, DVI, HDMI Connectors
- See All
Rectangular Connectors - Housings - Electromechanical
- Enclosures, Hardware, Office
-
Fans, Thermal Management
Back
- AC Fans
- DC Fans
- Fans - Accessories
- Fans - Accessories - Fan Cords
- Fans - Finger Guards, Filters & Sleeves
- Thermal - Accessories
- Thermal - Adhesives, Epoxies, Greases, Pastes
- Thermal - Heat Pipes, Vapor Chambers
- Thermal - Heat Sinks
- Thermal - Liquid Cooling
- Thermal - Pads, Sheets
- Thermal - Thermoelectric, Peltier Assemblies
- Thermal - Thermoelectric, Peltier Modules
Thermal - Heat Sinks -
LED/Optoelectronics
Back
- Display Modules - LCD, OLED Character and Numeric
- Display Modules - LCD, OLED, Graphic
- Display Modules - LED Character and Numeric
- Fiber Optics - Transceiver Modules
- Infrared, UV, Visible Emitters
- Laser Diodes, Modules
- LED Indication - Discrete
- LED Lighting - COBs, Engines, Modules, Strips
- LED Lighting - Color
- LED Lighting - White
- Optics - Light Pipes
- Panel Indicators, Pilot Lights
- See All
LED Indication - Discrete -
Passives
Back
-
Capacitors
Back
- Aluminum Electrolytic Capacitors
- Aluminum - Polymer Capacitors
- Capacitor Networks, Arrays
- Ceramic Capacitors
- Electric Double Layer Capacitors (EDLC), Supercapacitors
- Film Capacitors
- Mica and PTFE Capacitors
- Silicon Capacitors
- Tantalum Capacitors
- Tantalum - Polymer Capacitors
- Thin Film Capacitors
- Trimmers, Variable Capacitors
- Crystals
- Filters
- Inductors, Coils, Chokes
- Magnetics - Transformer, Inductor Components
- Oscillators
- Potentiometers, Variable Resistors
- Resistors
- Resonators
Capacitors -
Capacitors
- Power
- RF and Wireless
-
Semiconductors
Back
-
Development Boards, Kits, Programmers
Back
- Accessories
- Evaluation and Demonstration Boards and Kits
- Evaluation Boards - Analog to Digital Converters (ADCs)
- Evaluation Boards - Embedded - Complex Logic (FPGA, CPLD)
- Evaluation Boards - Embedded - MCU, DSP
- Evaluation Boards - Expansion Boards, Daughter Cards
- Evaluation Boards - LED Drivers
- Evaluation Boards - Op Amps
- Evaluation Boards - Sensors
- Programmers, Emulators, and Debuggers
- See All
-
Discrete
Back
- Diodes - Bridge Rectifiers
- Diodes - Rectifiers - Arrays
- Diodes - Rectifiers - Single
- Diodes - RF
- Diodes - Zener - Single
- Thyristors - SCRs
- Thyristors - TRIACs
- Transistors - Bipolar (BJT) - Arrays
- Transistors - Bipolar (BJT) - RF
- Transistors - Bipolar (BJT) Single
- Transistors - FETs, MOSFETs - Arrays
- Transistors - FETs, MOSFETs - Single
- Transistors - IGBTs - Single
- Transistors - JFETs
- See All
- Embedded Computers
- Integrated Circuits (ICs)
- Isolators
Embedded - Microcontrollers -
Development Boards, Kits, Programmers
-
Sensors, Transducers
Back
- Current Sensors
- Encoders
- Humidity, Moisture Sensors
- Image Sensors, Camera
- Magnetic Sensors - Linear, Compass (ICs)
- Motion Sensors - Accelerometers
- Optical Sensors - Ambient Light, IR, UV Sensors
- Optical Sensors - Photodiodes
- Position Sensors - Angle, Linear Position Measuring
- Pressure Sensors, Transducers
- Temperature Sensors - Analog and Digital Output
- Temperature Sensors - NTC Thermistors
- See All
Current Sensors -
Test and Measurement
Back
- Accessories
- Equipment - Multimeters
- Equipment - Oscilloscopes
- Equipment - Power Supplies (Test, Bench)
- Equipment - Specialty
- Test Clips - Alligator, Crocodile, Heavy Duty
- Test Clips - Grabbers, Hooks
- Test Leads - Banana, Meter Interface
- Test Leads - BNC Interface
- Test Leads - Jumper, Specialty
- Test Leads - Oscilloscope Probes
- Test Points
- Test Probe Tips
- See All
Equipment - Environmental Testers -
Tools
Back
- Crimpers - Crimp Heads, Die Sets
- Crimpers, Applicators, Presses
- Excavators, Hooks, Picks, Probes, Tuning Tools
- Insertion, Extraction
- Optical Inspection Equipment
- Prototyping, Fabrication Products
- Screw and Nut Drivers
- Screw and Nut Drivers - Sets
-
Soldering, Desoldering, Rework Products
Back
- Accessories
- Desoldering Braid, Wick, Pumps
- Dispensers, Dispenser Tips
- Flux, Flux Remover
- Fume, Smoke Extraction
- Holders, Stands
- Solder
- Solder Sponges, Tip Cleaners
- Solder Stencils, Templates
- Soldering Irons, Tweezers, Handles
- Soldering, Desoldering, Rework Stations
- Soldering, Desoldering, Rework Tips, Nozzles
- Static Control, ESD, Clean Room Products
- Specialized Tools
- Tweezers
- Wire Cutters
- Wire Strippers and Accessories
- See All
Screw and Nut Drivers - See All
- Manufacturers
- Resources
Settings
You're currently logged in to make purchases in USD. If you have a profile that is set up to purchase in RMB please visit My DigiKey and switch profiles.
If your account is not registered in RMB currency, please log out and use another email address to register an account or place an order as a guest.
Fast Delivery
Orders are typically delivered to China within 4 days depending on location.
Free Shipping
Free delivery to China on orders of $100 USD or more. A delivery charge of $30 USD will be billed on all orders less than $100 USD.
Incoterms
CPT if prepay and add, FCA Thief River Falls if billing to a shipper account as defined by INCOTERMS 2010
Customer is responsible for all applicable duties, tariffs, brokerage fees and taxes
Payment Types
Credit account for qualified institutions and businesses
Payment in Advance by Wire Transfer
Marketplace Product
More Products From Fully Authorized Partners
Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.
Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)
For more information visit Help & Support
SN74121DE4 Footprints and Models
Need Help?
Get fast and accurate answers from DigiKey's Technicians and Experienced Engineers on our TechForum.
How can I quickly find answers to my questions?
Please visit the Help & Support area of our website to find information regarding ordering, shipping, delivery and more.
What is my Order Status?
Registered users can track orders from their account dropdown, or click here. *Order Status may take 12 hours to update after initial order is placed.
How do I return product?
Users can begin the returns process by starting with our Returns Page.
How do I find price and availability?
Quotes can be created by registered users in myLists.
How do I create a 'myDIGIKEY' Account?
Visit the Registration Page and enter the required information. You will receive an email confirmation when your registration is complete.
Fast Delivery
Orders are typically delivered to China within 4 days depending on location.
Free Shipping
Free delivery to China on orders of $100 USD or more. A delivery charge of $30 USD will be billed on all orders less than $100 USD.
Incoterms
CPT if prepay and add, FCA Thief River Falls if billing to a shipper account as defined by INCOTERMS 2010
Customer is responsible for all applicable duties, tariffs, brokerage fees and taxes
Payment Types
Credit account for qualified institutions and businesses
Payment in Advance by Wire Transfer
Marketplace Product
More Products From Fully Authorized Partners
Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.
Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)
For more information visit Help & Support
Thank you!
Keep an eye on your inbox for news and updates from DigiKey!
Please enter an email address
INFORMATION
About DigiKey Marketplace Sell on DigiKey.com Fulfilled by DigiKey Careers Site Map Digital Solutions Newsroom
FOLLOW US
China
Copyright © 1995-2024, DigiKey.
All Rights Reserved.
Terms & Conditions
Privacy Notice
Cookie Settings