Description

The HCS301 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. It utilizes the KEELOQ® code hopping technology, offering high security, small package outline, and low cost. This device is a perfect solution for unidirectional remote keyless entry systems and access control systems.

Specifications and Features

- Programmable 28-bit serial number
- Programmable 64-bit encryption key
- Unique transmission for each code
- 66-bit transmission code length
- 32-bit hopping code
- 34-bit fixed code (28-bit serial number, 4-bit button code, 2-bit status)
- Read-protected encryption keys
- Operating voltage: 3.5V - 13.0V
- Four button inputs
- No additional circuitry required
- 15 available functions
- Selectable baud rate
- Automatic code word completion
- Battery low signal transmitted to receiver
- Battery low indication on LED
- Non-volatile synchronization data
- 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

Application Scenarios

Typical applications for the HCS301 include:
- Automotive RKE systems
- Automotive alarm systems
- Automotive immobilizers
- Gate and garage door openers
- Identity tokens
- Burglar alarm systems