The Intersil HFA3841 Wireless LAN Medium Access Controller is part of the PRISM® Enterprise 2.4GHz WLAN chip set. The HFA3841 directly interfaces with the Intersil HFA386x family of Baseband Processors, offering a complete end-toend chip set solution for wireless LAN products. Protocol and PHY support are implemented in firmware to allow custom protocol and different PHY transceivers.

Features
• IEEE802.11 Standard Data Rates: 1, 2, 5.5 and 11Mbps
• Part of the Intersil PRISM Wireless LAN Chip Set
• Full Implementation of the MAC Protocol Specified in IEEE Std. 802.11-1999 and the 802.11b Draft Standard
• Host Interface Supports Full 16-Bit Implementation of PC Card 95, also ISA PnP with Additional Chip
• Host Interface Provides Dual Buffer Access Paths
• External Memory Interface Supports up to 4M bytes RAM
• Internal Encryption Engine Executes IEEE802.11 WEP
• Low Power Operation; 25mA Active, 8mA Doze, <1mA Sleep
• Operation at 2.7V to 3.6V Supply
• 3V to 5V Tolerant Input/Outputs
• 128 Pin LQFP Package Targeted for Type II PC Cards
• IEEE802.11 Wireless LAN MAC Protocol Firmware and Microsoft® Windows® Software Drivers

Applications
• High Data Rate Wireless LAN
• PC Card Wireless LAN Adapters
• ISA, ISA PnP WLAN Cards
• PCI Wireless LAN Cards (Using Ext. Bridge Chip)
• Wireless LAN Modules
• Wireless LAN Access Points
• Wireless Bridge Products
• Wireless Point-to-Multipoint Systems