Microchip Technology HCS361/P

Description
The HCS361 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. It utilizes KEELOQ code hopping technology, combining high security, a small package outline, and low cost. The device is ideal for unidirectional remote keyless entry systems and access control systems.

Features
Security:
Programmable 28/32-bit serial number
Programmable 64-bit encryption key
Each transmission is unique
67-bit transmission code length
32-bit hopping code
35-bit fixed code
Encryption keys are read protected
Operating:
2.0-6.6V operation
Four button inputs
15 functions available
Selectable baud rate
Automatic code word completion
Battery low signal transmitted to receiver
Nonvolatile synchronization data
PWM and VPWM modulation
Other:
Easy to use programming interface
On-chip EEPROM
On-chip oscillator and timing components
Button inputs have internal pull-down resistors
Current limiting on LED output
Minimum component count

Enhanced Features Over HCS300
48-bit seed vs. 32-bit seed
2-bit CRC for error detection
28/32-bit serial number select
Two seed transmission methods
PWM and VPWM modulation
Wake-up signal in VPWM mode
IR Modulation mode

Applications
The HCS361 is ideal for Remote Keyless Entry (RKE) applications, including:
Automotive RKE systems
Automotive alarm systems
Automotive immobilizers
Gate and garage door openers
Identity tokens
Burglar alarm systems