The HCS301 from Microchip Technology Inc. is a code
hopping encoder designed for secure Remote Keyless
Entry (RKE) systems. The HCS301 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 remote
keyless entry systems and access control systems.