HCS300-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
HCS300-I/SN is a KEELOQ code-hopping encoder IC from Microchip for secure remote keyless entry systems, in an 8-pin SOIC package. Features rolling code authentication with a 64-bit encryption key for each transmission. Available from stock worldwide with competitive pricing.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- HCS300-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.3100(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of HCS300-I/SN?
- KEELOQ rolling code algorithm with 64-bit encryption key generates a unique hopping code for each button press, preventing replay attacks in remote access systems
- 8-pin SOIC package with single-function encoder IC simplifies PCB design for garage door openers, vehicle keyless entry fobs, and alarm system transmitters
- JESD-609 e3 lead-free compliant construction with 14-week lead time option supports volume production of secure wireless remote control transmitters
What is HCS300-I/SN used for?
HCS300-I/SN is the industry-standard KEELOQ code-hopping encoder IC used in remote keyless entry systems for automotive, residential, and commercial security applications where each button press must generate a unique, non-repeating encrypted transmission. Its rolling code algorithm with a 64-bit key ensures that intercepted codes cannot be reused by an attacker to gain unauthorized access, making it suitable for garage door openers, vehicle remote fobs, and building access control transmitters. The 8-pin SOIC package and single-function design simplify transmitter module PCB layout, supporting high-volume production of cost-effective, secure wireless remote control devices.
What are the specifications of HCS300-I/SN?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 14Weeks |
| 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 | 2.5mA |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Telecom IC Type | DATA ENCRYPTION CIRCUIT |
| Temperature Grade | INDUSTRIAL |
| 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 |
Where can I find the HCS300-I/SN datasheet?
HCS300-I/SN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for HCS300-I/SN?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does HCS300-I/SN's KEELOQ algorithm prevent relay and replay attacks on remote keyless entry systems?
HCS300-I/SN uses the KEELOQ rolling code algorithm with a 64-bit secret encryption key to generate a different hopping code for each button press, so each transmitted code is valid for one use only. Even if an attacker captures and records a transmitted code, it cannot be replayed because the receiver's synchronization counter advances with each accepted code, and any previously captured code is rejected as out-of-sequence, protecting against both replay and relay attack scenarios in garage door and vehicle entry systems.
What supply voltage range does HCS300-I/SN support and how long will a coin cell battery last in a key fob design?
HCS300-I/SN is designed to operate from a supply voltage range of 2.0 V to 6.3 V, making it compatible with standard CR2032 lithium coin cells (3 V nominal) commonly used in key fob transmitters. At typical transmit currents in the low-milliamp range during the brief 8 ms to 15 ms code transmission burst, a 220 mAh CR2032 coin cell typically supports thousands of button press operations over a 2-year to 5-year service life in normal automotive remote entry use patterns.
How does HCS300-I/SN serialize into a 315 MHz or 433 MHz RF transmitter module for a garage door opener?
HCS300-I/SN outputs its KEELOQ-encoded rolling code as a serial bit stream on the DATA pin, which directly drives the DATA input of a 315 MHz or 433 MHz ASK/OOK RF transmitter module such as the MCP2030 or a discrete SAW-based transmitter IC. The encoder transmits a preamble header followed by 66 bits of encrypted hopping code data at a programmable baud rate set by an external resistor, enabling direct integration with RF transmitters in garage door opener and residential alarm transmitter PCB designs operating at standard ISM band frequencies.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.6300 | $1.63 |
| 25+ | $1.5800 | $39.50 |
| 66+ | $1.4400 | $95.04 |
| 1000+ | $1.3900 | $1390.00 |
| 5000+ | $1.3100 | $6550.00 |
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