HCS301/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip HCS301/SN is a KeeLoq code-hopping encoder IC in an 8-pin SOIC package, providing secure rolling-code generation for remote keyless entry and access control systems. It operates from a wide voltage range and offers 66-bit encryption. Available in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- HCS301/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2200(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- KeeLoq rolling-code algorithm with 66-bit encryption for secure remote keyless entry
- 8-pin SOIC-8 package (0.150 inch wide) for compact PCB integration
- Wide operating voltage range supporting battery-powered remote transmitter designs
- Non-volatile memory stores manufacturer code and serial number for unique device identification
- RoHS compliant SOIC-8 plastic/epoxy package suited for automated SMT assembly
Applications
The HCS301/SN is primarily used in garage door openers, car remote keyless entry fobs, and building access control transmitters where secure rolling-code authentication is required. Its KeeLoq algorithm generates a new 66-bit encrypted code with each button press, preventing replay attacks. The compact 8-pin SOIC package makes it easy to integrate into small, battery-powered handheld transmitters.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 18Weeks |
| YTEOL | 8 |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max | 12mA |
| Supply Voltage-Nom | 6.6V |
| Surface Mount | YES |
| Telecom IC Type | DATA ENCRYPTION CIRCUIT |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for HCS301/SN:
Frequently Asked Questions
What encryption technology does the HCS301/SN use for secure remote access?
The HCS301/SN implements the KeeLoq rolling-code algorithm, generating a new 66-bit encrypted transmission code with each key press. This prevents replay attacks because an intercepted code is valid only once, making it appropriate for garage door openers, vehicle RKE systems, and building access transmitters.
What package does the HCS301/SN use and how does it benefit PCB design?
The HCS301/SN comes in an 8-pin SOIC-8 package that is 0.150 inches (3.81mm) wide, a standard small-outline footprint found on most PCB assembly lines. This narrow SOIC body allows placement in compact transmitter modules where board area is limited, and the package is compatible with standard SMT reflow processes.
In which end products is the HCS301/SN most commonly used?
The HCS301/SN is widely deployed in automotive keyless entry fobs, residential and commercial garage door openers, and building access control key fobs. Any product requiring secure one-way RF transmission with rolling-code authentication and operating from a coin-cell or small battery pack is a strong candidate for this encoder IC.
How does the HCS301/SN differ from a fixed-code encoder, and when should designers choose it?
Unlike fixed-code encoders that transmit the same binary pattern on every press, the HCS301/SN generates a unique rolling code each time, so an intercepted transmission cannot be reused. Designers should choose the HCS301/SN whenever the application requires protection against code-grab attacks, which is now mandatory in automotive RKE and increasingly expected in residential access products.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.4800 | $1.48 |
| 25+ | $1.4300 | $35.75 |
| 100+ | $1.3700 | $137.00 |
| 1000+ | $1.2600 | $1260.00 |
| 5000+ | $1.2200 | $6100.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”