View hcs362 datasheet:

HCS362 KEELOQ® Code Hopping Encoder FEATURES PACKAGE TYPES Security PDIP, SOIC • Programmable 28/32-bit serial number S0 VDD 1 8 • Two programmable 64-bit encryption keys LED/SHIFT 2 S1 7 • Programmable 60-bit seed • Each transmission is unique DATA 3 S2 6 • 69-bit transmission code length VSS S3/RFEN 4 5 • 32-bit hopping code • 37-bit fixed code (28/32-bit serial number, 4/0-bit function code, 1-bit status, 2-bit CRC/time, 2-bit queue) TSSOP • Encryption keys are read protected S2 1 8 S1 S3/RFEN 2 7 S0 Operation VSS 3 6 VDD 4 5 DATA LED/SHIFT • 2.0V – 6.3V operation • Four button inputs • 15 functions available HCS362 BLOCK DIAGRAM • Selectable baud rates and code word blanking Oscillator • Programmable minimum code word completion Power Latching