HCS512

Features:

Security
• Secure storage of Manufacturer's Code
• Secure storage of transmitter's keys
• Up to four transmitters can be learned
• KEELOQ code hopping technology
• Normal and secure learning mechanisms
Operating
• 3.0V 6.0V operation
• 4 MHz RC oscillator
• Learning indication on LRNOUT
• Auto baud rate detection
• Power saving sleep mode
Other
• Stand alone decoder
• On-chip EEPROM for transmitter storage
• Four binary function outputs15 functions
• 18-pin DIP/SOIC package
Typical Applications
• Automotive remote entry systems
• Automotive alarm systems
• Automotive immobilizers
• Gate and garage openers
• Electronic door locks
• Identity tokens
• Burglar alarm systems
Compatible Encoders
• HCS200, HCS300, HCS301, HCS360, HCS361
• NTQ106




Pinout






Specifications

Parameter NameValueReception Length Bits66Operating Voltage (V)4.0 to 6.0Decoder Functions S0S0, S1, S2, S3, V low ,15 Serial FunctionsOther FeaturesSingle-chip decoder with secure learningTransmitters SupportedUp to 4Encoders SupportedHCS200, HCS201, HCS300, HCS301, HCS320, HCS360, HCS361, HCS362, HCS365, HCS370, HCS410, HCS412, HCS473

Parameter	Symbol	Min.	Max.	Units
Program mode setup time	TPS	1	64	ms
Hold time 1	TPH1	8	128	ms
Hold time 2	TPH2	0.05	320	ms
Clock High Time	TCKH	0.05	320	ms
Clock Low Time	TCKL	0.050	320	ms
Acknowledge Time	TACK	-	80	ms

Note: FOSC equals 4 MHz.




Description

The HCS512 is a code hopping decoder designed for secure Remote Keyless Entry (RKE) systems. The HCS512 utilizes the patented KEELOQ? code-hopping system and high security learning mechanisms to make this a canned solution when used with the HCS encoders to implement unidirectional remote keyless entry systems. The manufacturer's code, transmitter keys, and synchronization information are stored in protected on-chip EEPROM. The HCS512 operates over a wide voltage range of 3.0 volts to 6.0 volts. The decoder employs automatic baud-rate detection, which allows it to compensate for wide variations in transmitter data rate. Sophisticated error checking algorithms are built in to ensure only valid codes are accepted. Typical applications include automotive remote entry systems, automotive alarm systems, automotive immobilizers, gate and garage openers, electronic door locks, identity tokens and burglar alarms. HCS512 is available in 18-pin DIP/SOIC packages.