HCS301

HCS301 KEELOQ® Code Hopping Encoder FEATURES Security Programmable 28-bit serial number Programmable 64-bit encryption key Each transmission is unique 66-bit transmission code length 32-bit hopping code 34-bit fixed code (28-bit serial number, 4-bit button code, 2-bit status) Encryption keys are read protected Operating 3.5V - 13.0V operation Four button inputs No additional circuitry required 15 functions available Selectable baud rate Automatic code word completion Battery low signal transmitted to receiver Battery low indication on LED Non-volatile synchronization data Other Functionally identical to HCS300 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 Typical Applications The HCS301 is ideal for Remote Keyless Entry (RKE) applications. These applications include: Automotive RKE systems Automotive alarm systems Automotive immobilizers Gate and garage door openers Identity tokens Burglar alarm systems DESCRIPTION The HCS301 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS301 utilizes the KEELOQ code hopping technology, which incorporates high security, a small package outline and low cost, to make this device a perfect solution for unidirectional remote keyless entry systems and access control sy...