HCS410T/SN

Specialized ICS Overview

The HCS410T/SN is a KEELOQ® code hopping encoder and transponder integrated circuit manufactured by Microchip Technology. It operates within a supply voltage range of 2.0V to 6.6V, with encoder-only operation supporting up to 13V. The device features two programmable 64-bit encoder keys and supports 16/32-bit bi-directional challenge-response authentication. It utilizes an on-chip tunable RC oscillator and non-volatile EEPROM for storing encryption keys, synchronization counters, and user data. The component is housed in an 8-SOIC package and functions as both a remote transmitter and a passive proximity transponder.

Specialized ICS Feature Summary

• KEELOQ® Code Hopping Security: Implements a patented 69-bit transmission protocol with 32-bit encrypted data, utilizing two programmable 64-bit keys to prevent code grabbing and scanning attacks.
• Dual Mode Operation: Functions as a code hopping encoder for remote entry or as an IFF (Identify Friend or Foe) transponder for immobilizer verification using 16/32-bit challenge-response algorithms.
• Integrated Transponder Interface: Includes LC0/LC1 pins for batteryless inductive communication, allowing the device to power up and transmit via magnetic field coupling without an internal battery.
• Configurable Transmission Features: Supports selectable PWM or Manchester encoding, code word blanking for FCC compliance, delayed increment mechanisms, and queue information transmission.

Specialized ICS Applications

• Automotive remote keyless entry (RKE) systems
• Vehicle immobilizers and anti-theft alarm systems
• Gate and garage door openers
• Electronic door locks for home, office, or hotel access control

Specialized ICS Procurement Notes

Verify the specific ordering suffix 'SN' corresponds to the 8-SOIC plastic package with a 0.154-inch width. Confirm that the 'T' designation indicates tape and reel packaging if bulk handling is required. Ensure compatibility with existing KEELOQ decoders for secure learning procedures. Check for end-of-life status or alternative sourcing options as availability may vary.

Specialized ICS Selection Notes

Select the HCS410T/SN when a combined encoder and transponder solution is needed to reduce system cost. Choose this part for applications requiring passive proximity activation and batteryless operation. Ensure the design supports the required 2.0V to 6.6V operating range and accommodates the 8-pin SOIC footprint. Verify that the application requires the specific 69-bit transmission format and KEELOQ encryption standards.

Specialized ICS Part Context

The HCS410 belongs to the KEELOQ family of security devices from Microchip Technology. It is designed to work in conjunction with compatible KEELOQ decoders to provide high-security access control. The device integrates encryption logic, EEPROM storage, and RF modulation drivers into a single low-cost package, serving as a turnkey solution for secure entry systems.

Specialized ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate other members of the Microchip KEELOQ family for pin-compatible alternatives if necessary, ensuring they support the same 8-SOIC package and voltage specifications.