HFA3842IN

Controllers Overview

The Intersil HFA3842IN is a Wireless LAN Medium Access Controller (MAC) designed for the PRISM 2.4GHz radio chipset. It provides full implementation of the MAC protocol specified in IEEE Standards 802.11-1999 and 802.11b, supporting data rates of 1, 2, 5.5, and 11 Mbps. The device interfaces directly with Intersil HFA386x family baseband processors to form a complete end-to-end solution. It features an internal encryption engine, supports firmware loading from serial Flash memory or PCMCIA Card Information Structure via serial EEPROM, and includes a low-frequency crystal oscillator for time maintenance during sleep modes.

Controllers Feature Summary

• Supports IEEE 802.11-1999 and 802.11b standards with multiple data rate capabilities
• Enables firmware download from host via serial EEPROM initialization
• Integrates an internal WEP encryption engine for security
• Provides backward compatible pinout with the HFA3841

Controllers Applications

• Wireless LAN products requiring 2.4GHz operation
• PCMCIA card implementations with serial EEPROM support
• Systems utilizing Intersil HFA386x baseband processors

Controllers Part Context

The HFA3842IN belongs to the Intersil PRISM wireless LAN chipset family. It serves as the MAC controller component, complementing baseband processors like the HFA386x series. This integration allows for standardized wireless communication protocols without requiring external protocol processing hardware.