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Intersil

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This page covers the following companies: Digital OceanCHOICE Microsystems
HarrisIntersilNo Wires NeededGlobespanVirataConexant.

Timeline[edit]

For later chipsets, see Conexant.

Wireless chipsets[edit]

b[edit]

Chipset MAC BB RFIC Interface PHY
modes
Notes First seen
(FCC)
Adapters ESystems pdf
PRISM I Am79C930 HFA3824
(HSP3824)
HFA3624 /
HFA3724
legacy (DSSS) (1996) [10]
802.11-1997 (2Mbps) [11]
5 devices 3 devices DS
All
PRISM I 3rd-party
and others
HFA3825
(HSP3825)
HFA3624 legacy (DSSS) 0 devices 0 devices
PRISM II HFA3841
(HFA3842)
HFA3861 HFA3683 PCMCIA (16-bit) b superhet radio, HFA3841
identical to the HERMES I
(Digital Ocean Shark/
CHOICE CW10) MAC ?
1999-11-09 78 devices 33 devices Doc
PRISM II HFA3845 HFA3861 HFA3683 PCMCIA (16-bit) b superhet radio 2000-07-25 2 devices 0 devices PCB
PRISM 2.5 HFA3842 HFA3863 HFA3683 PCMCIA (16-bit) b superhet radio 2000-05-08 3 devices 0 devices Doc
PRISM 2.5 ISL3873 (A/B) " ISL3685 PCMCIA (16-bit),
USB 1.1
b superhet radio 2001-06-04 78 devices 43 devices Doc
PRISM 2.5 ISL3874 "
"
ISL3685 PCI b superhet radio 2001-06-05 41 devices 14 devices Doc
PRISM 3 ISL3871 " ISL3684 PCMCIA (16-bit),
USB 1.1
b zero-IF (DCR) radio 2002-01-23 91 devices 20 devices Doc
PRISM 3 ISL3872 " ISL3684 PCI b zero-IF (DCR) radio,
ISL3871 w/ PCI interface
2002-12-21 4 devices 1 devices Doc

(a)bg[edit]

Chipset MAC / BB RFIC Interface PHY
modes
Notes First seen
(FCC)
Adapters ESystems pdf
PRISM
Indigo
ISL3877 ISL3687 PCI a . 2002-10-22 4 devices 1 devices
PRISM
Frisbee
ISL3880 ISL3680 / ISL3686 PCI bg addition of ISL3980 power amplifier
and ISL3090 10GHz VCO completes
a WLAN transceiver application
2003-01-10 30 devices 34 devices DS
PRISM
Javelin
ISL3886 ISL3686 PCI bg 2003-09-10 16 devices 5 devices
PRISM
Xbow
ISL3886 ISL3692 PCI abg 2003-12-09 6 devices 3 devices
PRISM
Duette
ISL3890 ISL3690 / ISL3692 PCI abg . 2003-08-21 7 devices 1 devices
PRISM
GT
ISL3890 ISL3690 PCI bg . 2002-12-20 9 devices 1 devices
PRISM
Frisbee
ISL3880
netchip net2280
(PCI/USB bridge)
ISL3686 USB 2.0 bg ISL3686A directly interfaces
with ISL3865A (BBP) and
ISL3880 (MAC) with BBP
2003-09-10 21 devices DS
PRISM
Javelin
ISL3886
netchip net2280
(PCI/USB bridge)
ISL3686 USB 2.0 bg 2003-10-23 17 devices
PRISM
Cohiba ?
ISL3887 ISL3686 USB 2.0 bg maybe Globespan Virata or
Conexant branded (GW3887)
2004-03-30 40 devices 0 devices
PRISM
Cohiba ?
ISL3887 ISL3692 USB 2.0 abg 2004-09-10 2 devices 0 devices

SoC[edit]

WiSoC[edit]

Chip RFIC Arch. Clock
speed
PHY
modes
Reference
designs
First seen
(FCC)
Notes ESystems External
links
ISL3856 PRISM 2 RF ARM940 b ISL36356A 2002-10-09 Rebranded NWN Poldhu
.
3 devices DS
ISL3893 ISL3686 ARM946E bg ISL39300A 2003-07-16 ISL3893 on AppelWiki 23 devices Wiki (SF)
ISL3893 ISL3690 ARM946E abg ISL39300A 2003-09-08 ISL3893 on AppelWiki 1 devices Wiki (SF)

Harris chipsets[edit]

PRISM I[edit]

  • HFA3824 - BBP (DSSS)
HFA3724 - QAM
HFA3624 - RFIC
HFA3524 - DS
HFA3424 - LNA
HFA3925 - PA

PRISM II[edit]

  • HFA3841 - MAC • DS
HFA3861 - BBP • DS
HFA3861A - BBP • DS
HFA3861B - BBP • DS
HFA3783 - QAM • DS
HFA3683(A) - RFIC • DS
HFA3983 - PA • DS

PRISM 2.5[edit]

  • HFA3842 - MAC • DS
  • HFA3842A - MAC • DS
  • HFA3842B - MAC • DS
HFA3863 - BPP • DS
  • ISL3873 - MAC/BBP (PCMCIA/USB) • DS
  • ISL3873A - MAC/BBP (PCMCIA/USB) • DS
  • ISL3874 - MAC/BBP (PCI) • DS
  • ISL3874A - MAC/BBP (PCI) • DS
ISL3783 - QUAD IF (QAM) • DS
ISL3685 - RF/IF (CONV) • DS
ISL3984 - PA (RMPA-2455) • DS
ISL3183 - VCO (GEN 748MHz)

PRISM 3[edit]

  • ISL3871 - MAC/BBP (PCMCIA) • DS
  • ISL3871A - MAC/BBP (PCMCIA) • DS
  • ISL3872 - MAC/BBP (PCI) • DS
ISL3684 - QAM/DS/RFIC (CONV) • DS
ISL3684A - QAM/DS/RFIC (CONV) • DS
ISL3984 - PA • DS
ISL3985 - PA • DS
ISL3084 - VCO

See also[edit]

NWN Swallow ? - MAC (Swallow 550/1100 ??)
HFA3860 (IV) - BBP (BaseBand Processor)
HFA3724 (IN) - QAM (Modulator/Demodulator)
HFA3624 (IA) - RFIC (Prescalar + IF/RF)
HFA3524 (IA) - DS (Digital Synthesizer)
HFA3424 (IB) - LNA (Low Noise Amp)
HFA3925 (IA96) - PA (Power Amp)

Relevant links[edit]

Digital Ocean[edit]

(via archive.org, Nov. 1996)
All pages captured by archive.org on the digocean.com domain
Digital Ocean's High-Speed Craft for 802.11 Voyages - SETH
Chip MAC in 128-pin TQFP chip pkg. (same as HFA3841 / HERMES)
NOTE: At the time of this article the MAC controller was called SETH,
it has since been renamed "PROTEUS"
(block diagram)

Choice Microsystems[edit]

Press release regarding acquisition by Harris

No Wires Needed (NWN)[edit]

NWN Poldhu - Intersil ISL3856 (rebranded)
NWN Swallow - Swallow 550/1100 (Parrot 1100)

Conexant[edit]

WLAN chipsets history:

Patents[edit]

(Published Dec. 6, 1994, Digital Ocean Inc. (Michael A. Fischer))
The microcontroller, in its presently preferred form, is a Motorola 68HC16 microprocessor.
(Published Sep. 21, 1999, Choice Technology Inc. (Michael A. Fischer) and others)

External Links[edit]

References[edit]