Envara

General information

Wi-Fi chipsets

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Official website (*long* since defunct, here's a snapshot from 2004-02, close to their merger with Intel)

Vendor IDs

This company is assigned USB vendor ID 132a (5 devices in DB).

Timeline

Founded in 2000, acquired by Intel in 2004

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(a)bg

Chipset	MAC / BB	RFIC	Interface	PHY modes	Notes	First seen (FCC)	Adapters	ESystems	pdf
WiND502	EN202	EN303	USB 2.0	abg	802.11a/b/g	2003-09-04	1 devices	0Empty strings are not accepted. devices	PPage
WiND512	EN202	EN313	USB 2.0	bg	802.11b/g	2003-09-04	15 devices	0Empty strings are not accepted. devices	PPage

• WiND502 802.11abg chipset consisting of:

EN202 - MAC/BB, USB interface, CMOS 180nm

EN303 - RFIC

• WiND512 802.11bg chipset consisting of:

EN202 - MAC/BB, USB interface, CMOS 180nm

EN313 - RFIC

EN202

The EN202 is a highly integrated, triple-mode wireless LAN medium access control (MAC) and baseband chip, compatible with IEEE 802.11a/b/g wireless standards. Envara's EN202 chip is incorporated into its WiND502™ and WiND512™ wireless LAN chipset solutions, enabling a clear migration path for applications using 802.11g technology to advanced 802.11a/g based solutions. The EN202 contains two modems. An orthogonal frequency division multiplexing (OFDM) modem is compatible with the IEEE 802.11a and 802.11g and supports multiple data rates of up to 54 Mbps. A direct sequence spread spectrum/ complementary code-keying (DSSS/CCK) modem supports the IEEE 802.11b standard and supports multiple data rates of up to 11 Mbps. The inherent flexibility of the chip supports many advanced MAC features such as improved security, low power consumption, system stability and multimedia support. Key Features Built-in IEEE 802.11a / 802.11g and IEEE 802.11b compatible dual-mode OFDM and DSSS/CCK modems. Built-in IEEE 802.11 MAC, to support IEEE 802.11 MAC extended features such as Security (802 11i, and WPA), QoS (802.11e and WPA), and DFS/TPC for compatibility with Worldwide radio regulations (801.11h/d/j). External data bus, enabling connection to additional memory components as well as interface controllers, such as USB2.0 transceivers Built-in A/D and D/A converters Low power consumption PCI and MII interfaces Applications WLAN network interface cards (NICs) CardBus, MiniPCI, Ethernet and USB2.0 (adapter and dongle) reference designs WLAN access points (AP) Residential gateways

EN303

The EN303 is a monolithic SiGe half-duplex RF multi-band transceiver designed to operate in either the 5GHz unlicensed frequency band (including all channels starting from 4.9 GHz up to 5.9GHz) or in the 2.4GHz unlicensed frequency band. As an integral part of Envara's WiND502™ triple-mode chipset, EN303 enables a very low-cost implementation of wireless LAN (WLAN) equipment such as network interface cards and access points. EN303 is compatible with IEEE 802.11a, 802.11b and 802.11g international wireless standards. Key Features One-World support - Operates within either 4.900~5.825 GHz or 2.412~2.484 GHz frequencies - supporting IEEE802.11h/g/j requirements Reduced BOM & small footprint On-chip VCOs, synthesizer, LNAs Envara's patented Enhanced Zero IF (EZ-IF™) architecture enables simpler integration and lower cost implementation by not requiring external IF or baseband filters High Performance High input dynamic range Excellent interference resilience Improved sensitivity; greater range Power management includes 'stand-by' mode to maximise power efficiency. Applications WLAN interface cards: MiniPCI, USB2.0, Ethernet and CardBus PC cards Access points (AP) Residential gateways

EN313

The EN313 is a monolithic SiGe half-duplex RF transceiver designed to operate in the 2.4GHz unlicensed frequency band (2.412 - 2.484GHz). As an integral part of Envara's WiND512™ chipset, EN313 enables a very low-cost implementation of wireless LAN (WLAN) Network Interface Cards (NICs) and Access Points (APs). EN313 is compatible with the IEEE 802.11g international wireless standard. Key Features Operates within 2.412~2.484 GHz frequencies – supporting IEEE802.11h/g/j requirements Reduced BOM & small footprint On-chip VCOs, synthesizer, LNAs Envara's patented Enhanced Zero IF (EZ-IF™) architecture enables simpler integration and lower cost implementation by not requiring external IF or baseband filters High Performance High input dynamic range Excellent interference resilience Improved sensitivity; greater range Power management includes 'stand-by' mode to maximise power efficiency. Single 3V power supply Applications WLAN interface cards: MiniPCI, USB2.0, Ethernet and CardBus PC cards Access points (AP) Residential gateways

See also

• envara.com (archive.org)