HCS200-I/P

Specialized ICS Overview

The HCS200-I/P is a code hopping encoder from Microchip Technology, utilizing KEELOQ® technology for secure remote access. It operates on a 3.5V to 13.0V supply and features three button inputs supporting up to seven functions. The device generates unique 66-bit transmission codes comprising a 32-bit encrypted portion and a 28-bit serial number. Internal EEPROM stores the 64-bit crypt key, synchronization counter, and configuration data. Packaged in an 8-pin PDIP (7.62mm), it requires minimal external components.

Specialized ICS Feature Summary

• KEELOQ® Code Hopping: Generates unique 66-bit codes with 32-bit encryption to prevent code scanning and replay attacks.
• Secure Memory: On-chip EEPROM stores a programmable 64-bit crypt key and 28-bit serial number; keys are read-protected.
• Flexible Input: Three switch inputs (S0-S2) allow implementation of up to seven distinct functions via simultaneous presses.
• Low Voltage Indicator: Transmits a VLOW signal when battery voltage drops below a configurable threshold.

Specialized ICS Applications

• Automotive Remote Keyless Entry (RKE)
• Gate and Garage Door Openers
• Burglar Alarm Systems
• Identity Tokens

Specialized ICS Procurement Notes

Verify the 'I' suffix indicates industrial temperature range (-40°C to +85°C). Confirm the '/P' suffix corresponds to the 8-pin PDIP package. Ensure compatibility with existing decoder firmware for KEELOQ authentication. Check for RoHS compliance status in the specific datasheet revision.

Specialized ICS Selection Notes

Select this component for unidirectional security applications requiring high resistance to code grabbing. Suitable for replacing fixed-code devices. Ensure the system design supports the required 3.5V to 13.0V operating range. Verify that the decoder can handle the 66-bit code word structure and synchronization logic.

Specialized ICS Part Context

Part of the HCS Security series, the HCS200 replaces older NTQ104/105/106 encoders. It offers seamless conversion with lower cost and enhanced security features. The device is designed for integration into transmitters carried by users for vehicle or property access.

Specialized ICS Replacement Considerations

Direct replacement for NTQ104, NTQ105, and NTQ106 encoders. Compatible with decoders programmed for KEELOQ technology. Ensure the new decoder supports the 66-bit code word format and updated learning strategies.

Specialized ICS FAQ

How many functions can be implemented with the HCS200?

Up to seven functions can be implemented using the three button inputs (S0, S1, S2) through individual presses or simultaneous combinations.

What is the length of the transmitted code word?

The HCS200 transmits a 66-bit code word, consisting of a 32-bit encrypted portion and a 34-bit fixed portion (including the 28-bit serial number).

Can the crypt key be read externally?

No, the 64-bit crypt key stored in the internal EEPROM is read-protected and not accessible via any external connection.