HCS410T-I/SN

Specialized ICS Overview

The HCS410T-I/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 supported up to 13V. The device is housed in an 8-SOIC surface-mount package and functions across an industrial temperature range of -40°C to +85°C. It integrates two programmable 64-bit encoder keys, supports 16/32-bit bi-directional challenge-response authentication, and features on-chip non-volatile EEPROM for secure key storage and user data.

Specialized ICS Feature Summary

• KEELOQ Code Hopping: Utilizes patented encryption with 69-bit transmission length (32-bit encrypted, 37-bit unencrypted) to prevent code grabbing and scanning attacks.
• IFF Transponder Mode: Supports 16/32-bit Identify Friend or Foe validation using up to two encryption keys for immobilizer and access control security.
• Batteryless Operation: Capable of passive proximity activation and batteryless transponder functionality via external LC resonant circuits connected to LC0/LC1 pins.
• Integrated Features: Includes on-chip tunable RC oscillator, PWM/Manchester encoding, delayed increment mechanism, and LED output capability on the S2/LED pin.

Specialized ICS Applications

• Automotive remote entry systems
• Automotive alarm systems
• Gate and garage openers
• Electronic door locks (Home/Office/Hotel)
• Proximity access control

Specialized ICS Procurement Notes

Verify component authenticity through authorized Microchip distributors. Confirm the specific suffix 'I/SN' corresponds to the industrial temperature grade (-40°C to +85°C) and SOIC-8 package. Check current availability status as production lifecycle stages may affect stock levels. Ensure ESD protection protocols are followed during handling and assembly.

Specialized ICS Selection Notes

Select the HCS410T-I/SN for applications requiring high-security rolling code encryption compatible with KEELOQ decoders. Choose this variant over other packages if surface-mount assembly is required. Verify that the system design accommodates the 2.0V to 6.6V operating voltage range. Consider the need for external LC components if implementing the batteryless transponder function.

Specialized ICS Part Context

This part belongs to the Microchip KEELOQ family of security devices. The 'HCS410' denotes the base model supporting combined encoder/transponder functions. The 'T' indicates tape-and-reel packaging, 'I' signifies the industrial temperature range, and 'SN' specifies the 8-pin SOIC package type. It shares the same footprint as other KEELOQ devices but includes dedicated LC pins for transponder operations.

Specialized ICS Replacement Considerations

Direct replacements must support the KEELOQ algorithm and 8-SOIC package. Compatible alternatives include other members of the HCS4xx series from Microchip, such as the HCS410 in PDIP or TSSOP packages, provided the pinout compatibility and thermal ratings meet the design requirements. Cross-model substitution requires verification of configuration bit settings and EEPROM capacity.