HCS412 - Microchip Technology

HCS412 Code Hopping Encoder and Transponder

The HCS412 combines patented K EELOQ® code hopping tech nology with bi-di rectional transponder challenge-and-response security into a single chip solution for logical and physical access control. When used as a code hopping encoder, the HCS412 is ideally suited to keyless entry systems; vehi cle an d garage do or access i n particular. T he same HCS41 2 can.

Features

Security
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• Programmable 64-bit encoder crypt key Two 64-bit IFF keys Keys are read protected 32-bit bi-directional challenge and response using one of two possible keys 69-bit transmission length
• 32-bit hopping code,
• 37-bit nonencrypted portion Programmable 28/32-bit serial number 60-bit, read protected seed for secure learning Two IFF encryption algorithms Delayed counter increment mechanism Asynchronous transponder communication Transmissions include button Queuing information 2.0V to 6.3V operation Three switch inputs: S2, S1, S0
  – seven functions Battery-less bi-directional tra.