HCS361

M 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 (28/32-bit serial number, 4/0-bit function code, 1-bit status, 2-bit CRC) Encryption keys are read protected HCS361 Code Hopping Encoder* PACKAGE TYPES PDIP, SOIC S0 S1 S2 S3 1 HCS361 2 3 4 8 7 6 5 VDD LED PWM VSS 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 HCS361 BLOCK DIAGRAM Oscillator Reset circuit LED LED driver Controller Power latching and switching EEPROM Encoder Other Easy to use programming interface On-chip EEPROM On-chip oscillator and timing components Button inputs have internal pulldown resistors Current limiting on LED output Minimum component count PWM 32-bit shift register VSS VDD Button input port 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 S3 S2 S1 S0 DESCRIPTION The HCS361 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS361 utilizes the KEELOQ code hopping technology, which incorporates high security, a small packa...