HCS410-I/SN

Specialized ICS Overview

The HCS410-I/SN is a KEELOQ code hopping encoder and transponder manufactured by Microchip Technology. It operates within a supply voltage range of 2.0V to 6.6V, with encoder-only operation supported up to 13V. The device features two programmable 64-bit encoder keys and supports 16/32-bit bi-directional challenge-response authentication. It generates 69-bit transmissions comprising 32 bits of encrypted data and 37 bits of non-encrypted information. The component is housed in an 8-SOIC package and includes on-chip EEPROM for secure key storage.

Specialized ICS Feature Summary

• KEELOQ Code Hopping: Utilizes a patented encryption algorithm with a 64-bit key length and 32-bit block cipher to prevent code grabbing and scanning attacks.
• IFF Transponder Mode: Supports Identify Friend or Foe validation using 16/32-bit challenge-response algorithms with up to two IFF keys.
• Integrated Security Features: Includes read-protected encoder keys, programmable serial numbers (28/32-bit), and a delayed counter increment mechanism to mitigate jamming.
• Flexible Transmission Formats: Offers selectable Pulse Width Modulation (PWM) or Manchester encoding with configurable baud rates and code word blanking options.

Specialized ICS Applications

• Automotive remote entry systems
• Automotive alarm and immobilizer systems
• Gate and garage door openers
• Electronic door locks for home, office, or hotel use
• Proximity access control systems

Specialized ICS Procurement Notes

Verify the specific ordering suffix '-I/SN' against the manufacturer's current datasheet to confirm the industrial temperature grade (-40°C to +85°C) and SOIC-8 package variant. Ensure compatibility with existing decoder infrastructure, as the HCS410 requires matching KEELOQ decoders for proper learning and operation. Check for end-of-life status or alternative sourcing if long-term availability is required.

Specialized ICS Selection Notes

Select the HCS410 when a combined encoder and transponder function is needed in a single IC to reduce system cost. Choose this model over the HCS412 if only two encoder keys are required rather than four. Consider the 8-SOIC package for surface-mount applications requiring a compact footprint. Verify that the application environment stays within the specified -40°C to +85°C operating temperature range.

Specialized ICS Part Context

The HCS410 belongs to the KEELOQ family of security devices from Microchip Technology. It is designed specifically for high-security entry systems where resistance to code replay attacks is critical. The device integrates both the transmitter logic for remote keyless entry and the passive transponder circuitry for immobilization, allowing for hybrid applications without additional discrete components.

Specialized ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Variants such as HCS410T-I/SN or HCS410-P may exist within the same family but require verification of pinout and functional equivalence against the specific design requirements before substitution.