DESCRIPTION

The Microchip Technology Inc. HCS515 is a code hopping decoder designed for secure Remote Keyless Entry (RKE) systems. The HCS515 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 a unidirectional remote and access control systems. The HCS515 can be used as a stand-alone decoder or in conjunction with a microcontroller.

FEATURES

Security

• Encrypted storage of manufacturer’s code

• Encrypted storage of encoder decryption keys

• Up to seven transmitters can be learned

• KEELOQ code hopping technology

• Normal and secure learning mechanisms

Operating

• 3.0V—5.5V operation

• Internal oscillator

• Auto bit rate detection

Other

• Stand-alone decoder

• Internal EEPROM for transmitter storage

• Synchronous serial interface

• 1 Kbit user EEPROM

• 14-pin DIP/SOIC package

Typical Applications

• Automotive remote entry systems

• Automotive alarm systems

• Automotive immobilizers

• Gate and garage openers

• Electronic door locks

• Identity tokens

• Burglar alarm systems