HCS320-I/SN

Specialized ICS Overview

The HCS320-I/SN is a code hopping encoder from Microchip Technology, part of the KEELOQ® series. It operates within a voltage range of 3.5V to 13.0V and utilizes a 64-bit encryption key alongside a programmable 28-bit serial number. The device generates a unique 66-bit transmission code for each activation, comprising a 32-bit hopping code and a 34-bit fixed code. It features an on-chip EEPROM for storing configuration data and synchronization values, ensuring secure unidirectional communication for remote access systems.

Specialized ICS Feature Summary

• KEELOQ® Code Hopping Security: Uses a 64-bit crypt key and 32-bit hopping algorithm to prevent code grabbing and scanning.
• Integrated Memory: Contains 192 bits of non-volatile EEPROM for encryption keys, serial numbers, and synchronization counters.
• Flexible Input Interface: Supports shift key operation with three switch inputs (S0, S1, S2) enabling up to 16 distinct functions.
• Power Management: Includes automatic code word completion, battery low signal transmission, and selectable baud rates.

Specialized ICS Applications

• Automotive Remote Keyless Entry (RKE) systems
• Automotive alarm and immobilizer systems
• Gate and garage door openers
• Burglar alarm systems

Specialized ICS Procurement Notes

Verify the specific suffix 'I/SN' corresponds to the industrial temperature range (-40°C to +85°C) and SOIC-8 package as documented in the datasheet. Confirm that the programming interface requirements align with system design constraints before procurement.

Specialized ICS Selection Notes

Select this component for applications requiring high-security unidirectional control where resistance to code replay attacks is critical. Ensure the power supply voltage remains within the 3.5V to 13.0V operating range. Consider the available function codes and baud rate settings when designing the user interface and receiver firmware.

Specialized ICS Part Context

The HCS320 belongs to the KEELOQ® family of code hopping encoders designed by Microchip Technology. This technology is widely adopted in the automotive and security industries for its robust encryption capabilities. The device integrates the encryption engine, oscillator, and memory into a single compact package, reducing external component count.

Specialized ICS Replacement Considerations

Check for other members of the HCS3xx series or compatible KEELOQ® encoders if availability is an issue. Ensure any substitute supports the same 64-bit key length and 66-bit transmission format to maintain compatibility with existing decoders.