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The HCS300 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS300 utilizes the KEELOQ code hopping technology, incorporating high security, a small package outline and low cost. The HCS300 is a perfect solution for unidirectional remote keyless entry systems and access control systems.
Security * Programmable 28-bit serial number * Programmable 64-bit encryption key * Each transmission is unique * 66-bit transmission code length * 32-bit hopping code * 28-bit serial number, 4-bit button code, 2-bit status * Crypt keys are read protected
Operating * 2.0V – 6.3V operation * Four button inputs * No additional circuitry required * 15 functions available * Selectable baud rate * Automatic code word completion * Low battery signal transmitted to receiver * Non-volatile synchronization data
Other * Easy-to-use programming interface * On-chip EEPROM * On-chip oscillator and timing components * Button inputs have internal pull-down resistors * Current limiting on LED output * Low external component cost
* Automotive RKE systems * Automotive alarm systems * Automotive immobilizers * Gate and garage door openers * Identity tokens * Burglar alarm systems