HFA3841 Datasheet, PDF (1/27 Pages) Intersil Corporation – Wireless LAN Medium Access Controller

TM
PRELIMINARY
Data Sheet
HFA3841
January 2000 File Number 4661.2
Wireless LAN Medium Access Controller
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-to-
end chip set solution for wireless LAN products. Protocol and
PHY support are implemented in firmware to allow custom
protocol and different PHY transceivers.
The HFA3841 is designed to provide maximum performance
with minimum power consumption. External pin layout is
organized to provide optimal PC board layout to all user
interfaces.
Firmware implements the full IEEE 802.11 Wireless LAN
MAC protocol. It supports BSS and IBSS operation under
DCF, and operation under the optional Point Coordination
Function (PCF). Low level protocol functions such as
RTS/CTS generation and acknowledgement, fragmentation
and de-fragmentation, and automatic beacon monitoring are
handed without host intervention. Active scanning is
performed autonomously once initiated by host command.
Host interface command and status handshakes allow
concurrent operations from multi-threaded I/O drivers.
Additional firmware functions specific to access point
applications are also available.
Designing wireless protocol systems using the HFA3841 is
made easier with the availability of evaluation board,
firmware, software device drivers, and complete
documentation.
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
Ordering Information
PART
NUMBER
TEMP. RANGE
(^oC)
PACKAGE
PKG. NO.
HFA3841CN
0 to 70
128 Ld LQFP Q128.14x20
HFA3841CN96
0 to 70
Tape and Reel
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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