Microchip Technology HCS410-I/ST

Description
The HCS410 is a code hopping encoder and transponder that provides security features such as two programmable 64-bit encoder keys, 16/32-bit bi-directional challenge and response, and a 69-bit transmission length. It also features 32-bit unidirectional code hopping, a 37-bit non-encrypted portion, and encoder keys that are read protected. Additionally, it has a programmable 28/32-bit serial number, a 60/64-bit read-protected seed for secure learning, and three IFF encryption algorithms.

Features
Security:
Two programmable 64-bit encoder keys
16/32-bit bi-directional challenge and response
69-bit transmission length
32-bit unidirectional code hopping
37-bit non-encrypted portion
Encoder keys are read protected
Programmable 28/32-bit serial number
60/64-bit, read-protected seed for secure learning
Three IFF encryption algorithms
Delayed increment mechanism
Power:
2.0V-6.6V operation
13V encoder only operation
Communication:
Asynchronous transponder communication
Queuing information transmitted
Selectable baud rate and code word blanking
Automatic code word completion
Combined transmitter, transponder operation
Anti-collision of multiple transponders
Passive proximity activation
Other:
Device protected against reverse battery
Intelligent damping for high Q LC-circuits
On-chip tunable RC oscillator (±10%)
On-chip EEPROM
64-bit user EEPROM in transponder mode
Battery-low LED indication
SQTP serialization quick-time programming
8-pin PDIP/SOIC/TSSOP and die

Applications
Automotive remote entry systems
Automotive alarm systems
Automotive immobilizers
Gate and garage openers
Electronic door locks (Home/Office/Hotel)
Burglar alarm systems
Proximity access control