The HCS412 combines the patented KEELOQ® code hopping technology and bi-directional transponder challenge-and-response security into a single chip solution for logical and physical access control. High security learning mechanisms make this a turnkey solution when used with the KEELOQ® decoders. When the HCS412 is used as a code hopping encoder device, it is ideally suited to keyless entry systems, primarily for vehicles and home garage door openers. It is meant to be a cost-effective, yet secure solution to such systems. The HCS412 can also be used as a secure bi-directional transponder for verification of a token. The HCS412 has a sensitive transponder input that increases the communication range beyond traditional transponder systems. This makes the HCS412 ideal for passive keyless entry, secure access control and identification applications. A single HCS412 can be used as an encoder for Remote Keyless Entry (RKE) and a transponder for immobilization in the same circuit and thereby dramatically reducing the cost of hybrid transmitter/transponder circuits.
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| HCS412 Datasheet | Data Sheets | 05/31/2011 | 976KB | |
| HCS412 Silicon Rev B0 Errata | Errata | 03/18/2003 | 82KB | |
| HCSXXX Memory Programming Specification | Programming Specification | 12/07/2004 | 411KB | |
| Programming KEELOQ Devices w/PRO MATE® II | Programming Specification | 09/03/2004 | 740KB | |
| KEELOQ® Code Hopping Devices Product Overview | Sell Sheets | 03/14/2005 | 142KB | |
| Keeloq® HCS4XX Transponder/Encoder Family | Sell Sheets | 04/08/2004 | 91KB |
