Microchip Technology, Inc. Specialized ICs HCS412/P

The HCS412/P is a specialized integrated circuit designed for secure access control applications, utilizing KEELOQ® code hopping technology. It features a programmable 64-bit crypt key, two 64-bit IFF keys, and a 32-bit bi-directional challenge and response mechanism, enhancing security against unauthorized access. The device operates within a voltage range of 2.0V to 6.3V and supports multiple switch inputs for versatile functionality. This IC is suitable for various applications, including automotive remote entry systems, electronic door locks, and burglar alarm systems. It supports battery-less bi-directional transponder capabilities and includes features such as a battery low detector, automatic code word completion, and passive proximity activation. The HCS412/P is available in an 8-pin PDIP or SOIC package, making it a compact solution for integration into security systems.