DESCRIPTION

The HCS201 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS201 utilizes the KEELOQ® code hopping technology, incorporating high security, a small package outline and low cost. The HCS201 is a perfect solution for unidirectional remote keyless entry systems 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-13V operation (2.0V min. using the Step up feature)

• Three button inputs

• 7 functions available

• Selectable baud rate

• Automatic code word completion

• Battery low signal transmitted to receiver

• Non-volatile synchronization data

Other

• Simple programming interface

• On-chip EEPROM

• On-chip oscillator and timing components

• Button inputs have internal pull-down resistors

• Minimum component count

• Synchronous Transmission mode

• Built-in step up regulator