Download Datasheets HCS500 Device 
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Home - KEELOQ Authentication Products - Decoders - HCS500 Device, download datasheet

Download Datasheets HCS500 Device

The HSC500 is a code hopping decoder designed for secure Remote Keyless Entry (RKE) systems. The HCS500 utilizes the patented KEELOQ code-hopping system and high security learning mechanisms to make this a canned solution when used with the HCS encoders to implement unidirectional remote and access control systems. The HCS500 can be used as a stand-alone decoder or in conjunction with a microcontroller through a serial interface. The manufacturers code, encoder keys, and synchronization information are stored in encrypted form in external EEPROM. The HCS500 operates over a wide voltage range of 3.0 volts to 5.5 volts. The decoder employs automatic bit-rate detection, which allows it to compensate for wide variations in transmitter data rate. Sophisticated error checking algorithms are built in to ensure only valid codes are accepted. Typical applications include automotive remote entry systems, automotive alarm systems, automotive immobilizers, gate and garage openers, electronic door locks, identity tokens and burglar alarms. HCS500 is available in 8-pin DIP/SOIC packages.

Datasheet and Other Documentation

Detailed Content

Lit. Number



HCS500 Datasheet Datasheet


Download HCS500 Datasheet Datasheet


In Production

Specification Chart

Reception Length Bits

Transmitters Supported

Operating Voltages



Up to 7

4.5V to 5.5V

15 Serial Functions

Additional Features

8 Pin KEELOQ decoder, Requires external 1K/2K EEPROM Serial interface or stand-alone mode

Package Options

8 SOIC 300mil(SO), 8 PDIP(P), 2008-2015 - download datasheets