Download Datasheets HCS320 Device 
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Home - KEELOQ Authentication Products - Encoders - HCS320 Device, download datasheet

Download Datasheets HCS320 Device

The HCS320 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS320 utilizes Microchips patented KEELOQ hopping technology, which incorporates high security, a small package outline, and low cost, to make this device a perfect solution for unidirectional remote keyless entry systems and access control systems. The HCS320 combines a 32-bit hopping code generated by a non-linear encryption algorithm, with a 28-bit serial number and 6 status bits to create a 66-bit transmission stream. The length of the transmission eliminates the threat of code scanning and the code hopping mechanism makes each transmission unique, thus rendering code capture and re-send (code grabbing) schemes useless. The encoder key, serial number, and configuration data are stored in EEPROM, which is not accessible via any external connection. This makes the HCS320 a very secure unit. The HCS320 provides an easy-to-use serial interface for programming the necessary security keys, system parameters, and configuration data. Additional features include Shift operation, an LED Drive, Overflow bits, Time-out and Battery low indicator. The HCS320 operates in a voltage range of 3.5V to 13.0V.

Datasheet and Other Documentation

Detailed Content

Lit. Number



HCS320 Datasheet


Download HCS320 Datasheet


In Production

Specification Chart

Reception Length Bits

Transmitters Supported

Operating Voltages




3.5V to 13V


Additional Features

LED, Shift key, Overflow bits, Timeout, Battery Low Indicator

Package Options

8 SOIC 150mil(SN), 8 PDIP(P), 2008-2015 - download datasheets