Intersil HFA3860BIV96

The HFA3860B integrates DSSS transmit and receive baseband functions for full- or half-duplex packet radios. It is intended to work with an external 2.4 GHz RF/IF signal chain; its I and Q analog inputs are sampled on-chip, and digital transmit I/Q outputs connect to the companion modulation path. The serial control interface configures operating modes and registers.

• Selectable 1, 2, 5.5 and 11 Mbps data rates.
• DBPSK, DQPSK, CCK and MBOK modulation paths.
• On-chip 3-bit I/Q receive converters and 6-bit RSSI converter.
• Clear-channel assessment and dual-antenna diversity support.
• Compact 48-lead TQFP for legacy PCMCIA-class wireless designs.

The receive path combines I/Q sampling, acquisition, demodulation and packet-interface logic. RSSI monitoring supports clear-channel assessment. The transmit path provides packet framing, scrambling, differential encoding and DSSS spreading. Configuration is through a four-wire serial control port. A nominal 44 MHz master clock supports the documented data-rate modes.

The manufacturer ordering entry identifies HFA3860BIV96 as the tape-and-reel version of the 48-lead TQFP, package number Q48.7x7. The LCDChip workbook registers 48-TQFP and the expected /upload/package/48-TQFP.jpg image. Check the manufacturer mechanical drawing, lead pitch and pin-one orientation before PCB release.

Layout checks

• Use the Q48.7x7 mechanical drawing for the footprint.
• Separate analog and digital supply returns as directed by the baseband data sheet.
• Check the master-clock and I/Q interface timing.

The registered JPG is currently missing and must be supplied and verified before publication.

The manufacturer 48-pin top-view diagram and pin table identify MCLK (pin 30) as the master-clock input and RESET (pin 28) as master reset. IIN and QIN are analog receive inputs; IOUT (pin 48) and QOUT (pin 47) are transmit baseband outputs. SCLK, SDI, SD, R/W and CS support control access. TXD, TXCLK, TX_PE and TX_RDY form the transmit data interface; RXD, RXCLK, RX_PE, MD_RDY and CCA report receive-side data and status. Multiple VDD, VDDA and GND pins require the specified supply/ground connections.

Use the manufacturer pinout for every numeric assignment; the short functional summary does not replace schematic pin verification.

Use the manufacturer's electrical tables for design margins and test conditions; feature figures are not absolute-maximum ratings.

The manufacturer describes backward compatibility with HFA3824A and HFA3860A at the functional level. Substitution still requires checking firmware register maps, baseband timing, RF/IF companion devices, supply, package, temperature grade and qualification. The non-B HFA3860IV is a distinct device revision, not an unconditional drop-in replacement. No alternative link is added without a database-verified exact record and engineering review.

Intersil's HFA3860B data sheet, File 4594.1, provides the functional architecture, detailed pin table, electrical limits and the exact HFA3860BIV96 tape-and-reel ordering row. The PRISM product line is historical; confirm present support and traceability through the current rights holder or qualified legacy channel.

• Legacy 2.4 GHz DSSS wireless LAN and PCMCIA cards.
• Packet-radio modems designed around PRISM companion devices.
• Repair of compatible portable terminals and industrial wireless modules.

Match the complete HFA3860BIV96 marking, reel label, lot history, lead condition and moisture-handling requirements to received material. Confirm genuine sourcing and electrical suitability for the target revision. A supplier listing alone does not prove the condition or traceability of a legacy lot.

Validate register programming, clock distribution, I/Q levels, CCA and antenna-diversity wiring with the original manufacturer data sheet and target RF design. The missing package JPG and unverified current exact-code inventory and full price tiers block publication.