GENERAL DESCRIPTION

The HCS370 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) and secure remote control systems. The HCS370 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 authentication systems and access control systems.

FEATURES

Security

• Two programmable 32-bit serial numbers

• Two programmable 64-bit encoder keys

• Two programmable 60-bit seed values

• Each transmission is unique

• 67/69-bit transmission code length

• 32-bit hopping code

• Crypt keys are read protected

Operating

• 2.05-5.5V operation

• Six button inputs

• 15 functions available

• Four selectable baud rates

• Selectable minimum code word completion

• Battery low signal transmitted to receiver

• Nonvolatile synchronization data

• PWM, VPWM, PPM, and Manchester modulation

• Button queue information transmitted

• Dual Encoder functionality

Other

• On-chip EEPROM

• On-chip tuned oscillator (±10 over voltage and temperature)

• Button inputs have internal pull-down resistors

• LED output

• PLL control for ASK and FSK

• Low external component count

• Step-up voltage regulator

Typical Applications

The HCS370 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