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 entrysystems and access control systems.
●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 LEDoutput
●• 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
