Microchip Technology, Inc. Specialized ICs HCS500T/SM

The HCS500T/SM is a code hopping decoder designed for secure Remote Keyless Entry (RKE) systems, utilizing KEELOQ technology for enhanced security. It supports encrypted storage of manufacturer codes and cryptographic keys, allowing for the learning of up to seven transmitters. The device operates within a voltage range of 3.0V to 5.5V and features an internal oscillator along with automatic bit rate detection, making it adaptable to various transmitter data rates. This decoder can function as a stand-alone unit or in conjunction with a microcontroller, and it includes a synchronous serial interface for communication with host devices. The HCS500T/SM is suitable for applications such as automotive remote entry systems, alarms, immobilizers, and electronic door locks. It also supports external EEPROM for transmitter storage, ensuring secure and efficient operation in access control systems.