Hopping Decoder 14-Pin SOIC N T/R

The HCS370 is a code hopping encoder designed for secure Remote Keyless Entry (RKE) and secure remote control systems. The HCS370 utilizes the KEELOQ code hopping technology, which incorporates high security, a small package outline, and low cost to make this device a perfect solution for unidirectional authentication systems and access control systems.The HCS370 combines a hopping code generated by a non-linear encryption algorithm, a serial number, and status bits to create a secure transmission code. The length of the transmission eliminates the threat of code scanning and code grabbing access techniques.The crypt key, serial number, and configuration data are stored in an EEPROM array which is not accessible via any external connection. The EEPROM data is programmable but read protected. The data can be verified only after an automatic erase and programming operation. This protects against attempts to gain access to keys or manipulate synchronization values. In addition, the HCS370 supports a dual encoder. This allows two manufacturers to use the same device without having to use the same manufacturer"s code in each of the encoders. The HCS370 provides an easy to use serial interface for programming the necessary keys, system parameters, and configuration data.

• Security
• Two programmable 32-bit serial numbers
• Two programmable 64-bit encoder keys
• Two programmable 60-bit seed values
• Each transmission is unique
• 67/69-bit transmission code length
• 32-bit hopping code
• Crypt keys are read protected Operating
• 2.05-5.5V operation
• Six button inputs
• 15 functions available
• Four selectable baud rates
• Selectable minimum code word completion
• Battery low signal transmitted to receiver
• non-volatile synchronization data
• PWM, VPWM, PPM, and Manchester modulation
• Button queue information transmitted
• Dual Encoder functionality Other
• On-chip EEPROM
• On-chip tuned oscillator (±10% over voltage and temperature)
• Button inputs have internal pull-down resistors
• LED output
• PLL control for ASK and FSK
• Low external component count
• Step-up voltage regulator Typical Applications The HCS370 is ideal for Remote Keyless Entry (RKE) applications. These applications include:
• Automotive RKE systems
• Automotive alarm systems
• Automotive immobilizers
• Gate and garage door openers
• Identity tokens
• Burglar alarm systems
• Tape and Reel Packaging