DESCRIPTION

The HCS410 is a code hopping transponder device designed for secure entry systems. The HCS410 utilizes the patented KEELOQ? code hopping system and bi-directional challenge-and-response for logical and physical access control. High security learning mechanisms make this a turnkey solution when used with the KEELOQdecoders. The encoder keys and synchronization information are stored in protected on-chip EEPROM.

FEATURES

Security

? Two programmable 64-bit encoder keys

? 16/32-bit bi-directional challenge and response using one of two keys

? 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

? Asynchronous transponder communication

? Queuing information transmitted

Operating

? 2.0V - 6.6V operation, 13V encoder only operation

? Three switch inputs [S2, S1, S0]—seven functions

? Batteryless bi-directional transponder

? Selectable baud rate and code word blanking

? Automatic code word completion

? Battery low signal transmitted

? Non-volatile synchronization

? PWM or Manchester RF encoding

? Combined transmitter, transponder operation

? Anti-collision of multiple transponders

? Passive proximity activation

? Device protected against reverse battery

? Intelligent damping for high Q LC-circuits

Other

? 37-bit nonencrypted part contains 28/32-bit serial number, 4/0-bit function code, 1-bit battery low, 2-bit CRC, 2-bit queue

? Simple programming interface

? 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

Typical 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