HCS360-I/SN Microchip Integrated Circuit (Other) In Stock
The HCS360-I/SN is a Microchip KEELOQ code hopping encoder IC delivering rolling-code security for remote keyless entry and access control systems. It generates a 66-bit encrypted transmission with a unique 64-bit serial number and operates in an 8-pin SOIC package rated for 260°C peak reflow. Available from stock worldwide with competitive pricing.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- HCS360-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.7100(MOQ 100)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- KEELOQ code hopping algorithm generates a new 66-bit encrypted code with every button press, defeating replay attacks
- Unique factory-programmed 64-bit serial number ensures each encoder is cryptographically distinct for secure key pairing
- RoHS-compliant 8-pin SOIC package with matte tin finish rated for 260°C peak reflow, simplifying SMT assembly
- Low quiescent current suits battery-powered keyfob transmitters with years of standby life between 3V coin cell replacements
Applications
The HCS360-I/SN is the core security IC for remote keyless entry systems in automotive, garage door openers, and building access control where rolling-code encryption prevents code-grabbing attacks. Its KEELOQ algorithm ensures that each 66-bit transmitted code is valid only once, providing robust security for consumer and commercial keyless systems. The 8-pin SOIC package simplifies integration into compact RF transmitter modules that pair with Microchip HCS decoder ICs on the receiver side.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| JESD-609 Code | e3 |
| Peak Reflow Temperature (Cel) | 260 |
| Terminal Finish | Matte Tin (Sn) |
| Package | Other |
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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the KEELOQ algorithm in HCS360-I/SN protect against code-grabbing replay attacks?
The HCS360-I/SN uses the KEELOQ code hopping algorithm to generate a unique 66-bit encrypted transmission code for every button press, making each code valid only once. Even if an attacker captures the transmitted 66-bit code, replaying it is ineffective because the decoder has already incremented its synchronization counter, rejecting the repeated code and maintaining system security for garage door, vehicle, and building access applications.
What is the serial number length in HCS360-I/SN and how is it used during receiver programming?
Each HCS360-I/SN contains a factory-programmed unique 64-bit serial number transmitted as part of the 66-bit fixed code portion. During receiver learning mode, the HCS decoder stores this 64-bit serial number alongside the current synchronization counter, binding the specific encoder to the receiver. This ensures that only the authenticated HCS360 transmitter with matching serial number can activate the access system.
What peak reflow temperature does HCS360-I/SN support and how does this affect SMT assembly planning?
The HCS360-I/SN is rated for a 260°C peak reflow temperature with a JESD-609 e3 moisture sensitivity classification and matte tin terminal finish. This 260°C rating is compatible with standard lead-free SAC305 solder reflow profiles used in modern SMT lines, allowing the 8-pin SOIC to be processed without special low-temperature paste or nitrogen atmosphere requirements.
In which applications is HCS360-I/SN a better encoder choice than fixed-code RF transmitter ICs?
HCS360-I/SN is superior to fixed-code RF transmitter ICs in any application where replay attack vulnerability is unacceptable, such as automotive keyless entry, residential garage door systems, and commercial building access control with 315 MHz or 433 MHz transmitter modules. Fixed-code ICs transmit the same code every press, allowing a scanner to capture and replay the signal, while the KEELOQ 64-bit hopping code in the HCS360 makes captured codes cryptographically useless after a single use.
Related Guides
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 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 |
|---|---|---|
| 100+ | $1.9200 | $192.00 |
| 1000+ | $1.7600 | $1760.00 |
| 5000+ | $1.7100 | $8550.00 |
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.”