DESCRIPTION

The Microchip Technology Inc. HCS512 is a code hopping decoder designed for secure Remote Keyless Entry (RKE) systems. The HCS512 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 keyless entry system.

FEATURES

Security

• Secure storage of Manufacturer’s Code

• Secure storage of transmitter’s keys

• Up to four transmitters can be learned

• KEELOQ® code hopping technology

• Normal and secure learning mechanisms

Operating

• 4.0V – 6.0V operation

• 4 MHz external RC oscillator

• Learning indication on LRNOUT

• Auto baud rate detection

• Power saving SLEEP mode

Other

• Stand-alone decoder

• On-chip EEPROM for transmitter storage

• Four binary function outputs–15 functions

• 18-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