HCS320/P

Specialized ICS Overview

The HCS320/P is a KEELOQ® code hopping encoder manufactured by Microchip Technology in an 8-pin PDIP package. It operates within a supply voltage range of 3.5V to 13.0V and supports through-hole mounting. The device generates a unique 66-bit transmission code for each activation, combining a 32-bit encrypted hopping code with a 34-bit fixed code containing the serial number and function data. Designed for secure remote access, it integrates on-chip EEPROM for storing encryption keys and synchronization data.

Specialized ICS Feature Summary

• Generates a 66-bit unique transmission code using KEELOQ® technology to prevent code grabbing
• Operates on a 3.5V to 13.0V power supply with selectable baud rates
• Includes internal pull-down resistors on button inputs and current limiting on the LED output
• Features non-volatile synchronization data and automatic code word completion

Specialized ICS Applications

• Automotive Remote Keyless Entry (RKE) systems
• Gate and garage door openers
• Burglar alarm systems

Specialized ICS Procurement Notes

Verify the specific ordering suffix '/P' corresponds to the 8-pin PDIP package variant. Confirm that the required programming interface matches the serial data stream requirements defined in the datasheet. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range.

Specialized ICS Selection Notes

Select this component for unidirectional security applications requiring high resistance to code replay attacks. The 8-DIP package is suitable for prototyping or low-volume through-hole designs. Consider the available shift levels and baud rate options when designing the user interface and receiver timing constraints.

Specialized ICS Part Context

The HCS320 belongs to the KEELOQ® family of code hopping encoders from Microchip Technology. This series is widely utilized in the automotive and home security industries to provide secure wireless communication between transmitters and receivers.

Specialized ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing decoder firmware before attempting any cross-model substitution.

Specialized ICS FAQ

How does the HCS320 prevent code grabbing?

It uses KEELOQ® code hopping technology to generate a unique 66-bit transmission code for every button press, making captured codes useless for retransmission.

What is the function of the SHIFT input?

The SHIFT input increments a counter called the shift level, which modifies the function code transmitted by other buttons without initiating a transmission itself.

Can the HCS320 transmit multiple times while a button is held?

Yes, if a button is held down beyond the time required for one transmission, the device will automatically repeat the transmission until the button is released.