Microchip Technology, Inc. Specialized ICs HCS365-I/P

The HCS365-I/P is a code hopping encoder designed for secure Remote Keyless Entry (RKE) and remote control systems. It features two programmable 32-bit serial numbers, two 64-bit crypt keys, and two 60-bit seed values, ensuring unique transmissions for each activation. The device operates within a voltage range of 2.05-5.5V and supports four button inputs with 15 available functions. It offers selectable baud rates and transmits a battery low signal to the receiver. The HCS365 utilizes KEELOQ® code hopping technology, which enhances security by generating a unique transmission code for each button press, effectively preventing code grabbing and scanning. The integrated EEPROM allows for secure storage of cryptographic keys and configuration data, which are read protected to prevent unauthorized access. The device also supports various modulation techniques, including PWM, VPWM, PPM, and Manchester modulation. Typical applications for the HCS365 include automotive RKE systems, alarm systems, immobilizers, and garage door openers. Its low external component count and dual encoder functionality make it a cost-effective solution for manufacturers looking to implement secure access control systems.