View hcs360 datasheet:

HCS360 Code Hopping Encoder Product Brief* PACKAGE TYPES FEATURES PDIP, SOIC Security • Programmable 28/32-bit serial number 8 S0 VDD 1 • Programmable 64-bit encryption key • Each transmission is unique 7 LED 2 S1 • 67-bit transmission code length 6 PWM 3 • 32-bit hopping code S2 • 28-bit serial, 4-bit function, VLOW, 2-bit CRC VSS S3 4 5 • 48-bit seed • Encryption keys are read protected BLOCK DIAGRAM Operating Oscillator Power • 2.0V to 6.0V range latching and • Four button inputs Reset circuit Controller switching LED - No additional circuitry required LED driver - 15 functions available • Selectable baud rate EEPROM • Automatic power down after transmission Encoder/Decoder • Battery low signal transmitted to receiver • Nonvolatile synchron