The Intersil 2.4GHz PRISM™ chip set is a highly integrated six-chip solution for RF modems employing Direct Sequence Spread Spectrum (DSSS) signaling. Significant integration of transmit and receive functions employ the following ICs: complete integrated DSSS engine, the HFA3824; a quadrature modulator/demodulator, integrated with an IF limiter amplifier with RSSI, the HFA3724, HFA3726; a combined LNA/Mixer and upconverter/preamplifier, the HFA3624; a high performance, low noise amplifier for increased receiver sensitivity, the HFA3424; a dual synthesizer, the HFA3524 and a monolithic RF power amplifier, the HFA3925. Each of the functions may be used individually or in any combination in support of a variety of RF modem applications.

Features

• Provides Antenna-to-Bits™ Data Stream

• Low Voltage Operation from 2.7V to 5.5V

• 2.4GHz - 2.5GHz ISM Band Operation

• Single Heterodyne Conversion

• Programmable Antialiasing and Shaping Filters

• 10MHz to 400MHz IF Operation with RSSI

• Autonomous Half Duplex Direct Sequence Modem

• Selectable DBPSK, DQPSK Signalling

• Antenna Diversity Selection

• Direct Sequence Physical Layer (DS-PHY)

• Differential Data Encoding/Decoding

• Programmable 16-Bit PN Code

• Data Rates up to 4 MBPS DQPSK

• Power Management Control

• Low Profile PCMCIA-Compatible Surface Mount Packaging

Applications

• Systems Targeting IEEE 802.11 Standard

• PCMCIA Wireless Transceiver

• WLAN RF Modems

• TDMA Packet Protocol Radios

• Part 15 Compliant Radio Links