DESCRIPTION
The HCS200 from Microchip Technology Inc. is a code hopping encoder designed primarily for Remote Key less Entry (RKE) systems. The device utilizes the KEELOQ® code hopping technology, incorporating high security, a small package outline and low cost. The HCS200 is a perfect replacement of fixed code devices in unidirectional remote keyless entry systems and access control systems.

FEATURES
Security
• Programmable 28-bit serial number
• Programmable 64-bit crypt key
• Each transmission is unique
• 66-bit transmission code length
• 32-bit hopping code
• 28-bit serial number, 4-bit button status, low battery indicator transmitted
• Crypt keys are read protected

Operating
• 3.5–13.0V operation
• Three button inputs - seven 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
• Low external component cost

Typical Applications
The HCS200 is ideal for Remote Keyless Entry (RKE) applications. These applications include:
• Fixed code replacement
• Automotive RKE systems
• Automotive alarm systems
• Automotive immobilizers
• Gate and garage door openers
• Identity tokens
• Burglar alarm systems