HCS515-I/SL

Specialized ICS Overview

The HCS515-I/SL is a KEELOQ code hopping decoder manufactured by Microchip Technology in a 14-pin SOIC package. It operates within a voltage range of 4.5V to 5.5V and features an internal oscillator with automatic bit rate detection. The device includes encrypted storage for the manufacturer’s code and up to seven encoder decryption keys, along with 1 Kbit of user EEPROM. Communication with a host controller occurs via a synchronous serial interface using S_DAT and S_CLK lines.

Specialized ICS Feature Summary

• KEELOQ code hopping technology supporting up to seven learned transmitters
• Encrypted storage for manufacturer code and decoder keys
• Internal oscillator with auto bit rate detection
• Synchronous serial interface (S_DAT/S_CLK) for microcontroller communication

Specialized ICS Applications

• Automotive remote entry systems
• Automotive alarm systems
• Gate and garage openers
• Electronic door locks

Specialized ICS Procurement Notes

Verify that the ordering suffix 'I' corresponds to the industrial temperature range (-40°C to +85°C) as specified in the official datasheet. Confirm the 'SL' suffix indicates the 14-SOIC surface-mount package. Ensure compatibility with the system's 4.5V to 5.5V power supply requirements before procurement.

Specialized ICS Selection Notes

Select this component for secure unidirectional remote access applications requiring KEELOQ encryption. It supports PWM modulation formats (1/3-2/3) and TE ranges from 100 μs to 400 μs. The device can operate as a stand-alone decoder or interface with a microcontroller via its synchronous serial port.

Specialized ICS Part Context

The HCS515 belongs to the KEELOQ product family designed for high-security remote keyless entry systems. It utilizes patented code hopping algorithms to prevent code grabbing attacks. The device integrates sophisticated error checking and synchronization windows to ensure valid code acceptance while maintaining system security.

Specialized ICS Replacement Considerations

Compatible encoders must utilize the same KEELOQ algorithm settings, including 66- to 69-bit code word length and specific synchronization counter configurations. Verify that any replacement decoder supports the same learning mechanisms (Normal or Secure Learn) and memory slot architecture.