ISL3871IN18 Intersil Corporation, ISL3871IN18 Datasheet

ISL3871IN18

Manufacturer Part Number

ISL3871IN18

Description

Manufacturer

Intersil Corporation

Datasheet

1.ISL3871IN18.pdf (1 pages)

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Wireless LAN Integrated Medium Access

Controller with Baseband Processor

is part of the PRISM® 2.4GHz radio chipset. The ISL3871

directly interfaces with the Intersil’s Zero-IF

QMODEM(ISL3684). Adding Intersil’s Power Amp (ISL3984)

offers the designer a complete end-to-end WLAN chipset

solution. Protocol and PHY support are implemented in

firmware, thus supporting customization of the WLAN

solution.

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 acknowledgment, 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.

The ISL3871 has on-board A/D’s and D/A for analog I and Q

inputs and outputs, for which the ISL3684 Zero-IF QMODEM

is recommended. Differential phase shift keying modulation

schemes DBPSK and DQPSK, with data scrambling

capability, are available along with Complementary Code

Keying to provide a variety of data rates. Both Receive and

Transmit AGC functions with 7-bit AGC control obtain

maximum performance in the analog portions of the

transceiver.

Built-in flexibility allows the ISL3871 to be configured

through a general purpose control bus, for a range of

applications. The ISL3871 is housed in either a thin plastic

BGA package or a TQFP flat pack suitable for PCMCIA

board applications.

The ISL3871 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 PCMCIA and USB.

The Intersil ISL3871 Wireless LAN

Integrated Medium Access Controller

with Integrated Baseband Processor

Data Sheet

PRISM® is a registered trademark of Intersil Americas Inc. PRISM and design is a trademark of Intersil Americas Inc.

1-888-INTERSIL or 321-724-7143

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

ISL3871IK18, ISL3871IN18

Features

• USB host interface supports USB V1.1 at 12Mbps.

• New Start up modes allow the PCMCIA card information

• Firmware can be loaded from serial flash memory

• Zero glue connection to 16-bit wide SRAM devices

• Low-frequency crystal oscillator to maintain time and allow

• Improved performance of internal WEP engine

• Improvements to debug mode support tracing execution

• Programmable MBUS cycle extension allows accessing of

• Complete DSSS baseband processor

• RAKE receiver with decision feedback equalizer

• Processing gain . . . . . . . . . . . . . . . . . . . . . FCC compliant

• Programmable data rate . . . . . . . . . 1, 2, 5.5, and 11Mbps

• Available in two packages:

• Modulation methods . . . . . . . .DBPSK, DQPSK, and CCK

• Supports full or half duplex operations

• On-chip A/D and D/A converters for I/Q data, AGC, and

• Targeted for multipath delay spreads 100ns at 11Mbps,

• Supports short preamble and antenna diversity

Applications

• PC Card Wireless LAN Adapters

• USB Wireless LAN Adapters

• PCN / Wireless PBX / Wireless Local Loop

• High Data Rate Wireless LAN Systems Targeting IEEE

• Wireless LAN Access Points and Bridge Products

• Spread Spectrum WLAN RF Modems

• TDMA or CSMA Packet Protocol Radios

• ISA, ISA PnP WLAN Cards

Ordering Information

ISL3871IK18

ISL3871IK18-TK

ISL3871IN18

ISL3871IN18-TS

PART NUMBER

structure to be initialized from a serial EEPROM. This

allows firmware to be downloaded from the host,

eliminating the parallel flash memory device

baseband clock source to power off during sleep mode

from on chip memory

slow memory devices without slowing the clock

- Ultra small BGA package. . . . . . . . . . . . . . . 14 x 14mm

- Large LQFP flat pack for easy board layout

adaptive power control

250ns at 5.5Mbps

802.11b Standard

March 2003

Intersil (and design) is a registered trademark of Intersil Americas Inc.

RANGE (

-40 to 85

TEMP.

192 BGA

Tape and Reel 1000 Units /Reel

208 LQFP

Tape and Reel 500 Units/Reel

DESCRIPTION

PACKAGE

V192.14x14

Q208.28x28A

FN8040.1

PACKAGE

PART #

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