ISL3874
TM
Data Sheet
March 2001
File Number 8010
PRELIMINARY
Wireless LAN Integrated Medium Access
Controller with Baseband Processor with
Mini-PCI
Features
• Start up modes allow the mini PCI Card Information
Structure to be initialized from a serial EEPROM. This
Allows Firmware to be Downloaded from the Host,
Eliminating the Parallel Flash Memory Device
The Intersil ISL3874 Wireless LAN
Integrated Medium Access Controller
• Firmware Can Be Loaded from Serial Flash Memory
• Zero Glue Connection to 16-Bit Wide SRAM Devices
with Integrated Baseband Processor
is part of the PRISM® 2.4GHz radio
itle
L38
chip set. The ISL3874 directly interfaces with the Intersil’s IF
QMODEM (HFA3783). Adding Intersil’s RF/IF Converter
(ICW3685) and Intersil’s Power Amp (HFA3983/4/5) offers
the designer a complete end-to-end WLAN Chip Set
solution. Protocol and PHY support are implemented in
firmware thus, supporting customization of the WLAN
solution.
• Low Frequency Crystal Oscillator to Maintain Time and
Allow Baseband Clock Source to Power Off During Sleep
Mode
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• High Performance Internal WEP Engine
• Debug Mode Support Tracing Execution from On-Chip
Memory
• Programmable MBUS Cycle Extension Allows Accessing
of Slow Memory Devices without Slowing the Clock
egra Firmware implements the full IEEE 802.11 Wireless LAN
MAC protocol. It supports BSS and IBSS operation under
• Complete DSSS Baseband Processor
DCF, and operation under the optional Point Coordination
Function (PCF). Low level protocol functions such as
RTS/CTS generation and acknowledgment, fragmentation
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• RAKE Receiver with Decision Feedback Equalizer
• Processing Gain. . . . . . . . . . . . . . . . . . . . .FCC Compliant
• Programmable Data Rate . . . . . . . 1, 2, 5.5, and 11Mbps
• Ultra Small Package. . . . . . . . . . . . . . . . . . 14mm x 14mm
• Single Supply Operation . . . . . . . . . . . . . . . . 2.7V to 3.6V
• Modulation Methods. . . . . . . . DBPSK, DQPSK, and CCK
• Supports Full or Half Duplex Operations
cess
ntro
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.
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eba
• On-Chip A/D and D/A Converters for I/Q Data (6-Bit,
22MSPS), AGC, and Adaptive Power Control (7-Bit)
ces
The ISL3874 has on-board A/Ds and D/A for analog I and Q
inputs and outputs, for which the HFA3783 IF QMODEM is
recommended. Differential phase shift keying modulation
schemes DBPSK and DQPSK, with data scrambling
capability, are available along with Complementary Code
• Targeted for Multipath Delay Spreads 125ns at 11Mbps,
250ns at 5.5Mbps
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• Supports Short Preamble and Antenna Diversity
tho Keying to provide a variety of data rates. Both Receive and
Applications
Transmit AGC functions with 7-bit AGC control obtain
• Enterprise WLAN Systems
maximum performance in the analog portions of the
transceiver.
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• PCI Card Wireless LAN Adapters
• PCN / Wireless PBX / Wireless Local Loop
Built-in flexibility allows the ISL3874 to be configured
through a general purpose control bus, for a range of
applications. The ISL3874 is housed in a thin plastic BGA
package suitable for mini PCI board applications.
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• High Data Rate Wireless LAN Systems Targeting IEEE
802.11b Standard
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egra
• Wireless LAN Access Points and Bridge Products
• Spread Spectrum WLAN RF Modems
The ISL3874 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 including mini PCI.
• TDMA or CSMA Packet Protocol Radios
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Ordering Information
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PART
TEMP.
PART
NUMBER
o
NUMBER
RANGE ( C)
PACKAGE
ISL3874IK
-40 to 85
192 BGA
V192.14x14
h
ISL3874IK96
-40 to 85
Tape and Reel 1000 Units/Reel
PRISM® is a registered trademark of Intersil Americas Inc. PRISM and design is a trademark of Intersil Americas Inc.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, All Rights Reserved
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