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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