Hopping Decoder 8-Pin SOIJ

The Microchip Technology Inc. HCS500 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 a unidirectional remote and access control systems. The HCS500 can be used as a stand-alone decoder or in conjunction with a microcontroller.

• Security
  • Encrypted storage of manufacturer’s code
  • Encrypted storage of crypt 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 chipset
  • External EEPROM for transmitter storage
  • Synchronous serial interface
  • 1 Kbit user EEPROM
  • 8-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
• Compatible Encoders All KEELOQ encoders and transponders configured for the following setting:
  • PWM modulation format (1/3-2/3)
  • TE in the range from 100us to 400us
  • 10 x TE Header
  • 28-bit Serial Number
  • 16-bit Synchronization counter
  • Discrimination bits equal to Serial Number 8 LSbs
  • 66- to 69-bit length code word