DESCRIPTION

The HCS200 from Microchip Technology Inc. is a code hopping encoder designed primarily for Remote Keyless 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.

APPLICATION

The HCS200 operates over a wide voltage range of 3.5 volts to 13.0 volts and has three button inputs in an 8-pin configuration. This allows the system designer the freedom to implement up to seven functions. The only components required for device operation are the buttons and RF circuitry, allowing a very low system cost.

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

SPECIFICATION

RELEVANT POPULAR RESEARCHES

PICTURE

HCS200-I/SN IMAGE