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Silver rectangular PCMCIA card with integrated antenna, Type II thickness

TRENDnet

TRENDnet TEW-421PC 802.11g PCMCIA Wireless Adapter laptop networking

SKU CH-58NA-4JX97 MPN TEW-421PC

An 802.11g PCMCIA wireless adapter adding 54 Mbps Wi-Fi to laptops via a 32-bit CardBus slot

  • Interface type32bit CardBus Type II
  • Supported standardsIEEE802.11b/g
  • Maximum data rates54 Mbit/s
  • Security features64/128-bit WEP, WPA
  • Radio bands2.4 to 2.497 GHz (Industrial Scientific Medical Band)
  • Audio channels1 to 11 channels (FCC), 1 to 13 channels (ETSI), 1 to 14 cha
  • 54Mbps wireless G speed for faster notebook networking
  • 32-bit CardBus Type II interface fits standard laptop slots
  • 64/128-bit WEP and WPA encryption protects data
  • 4 GHz band with dual diversity antenna for reliable signal
  • Ad-Hoc and Infrastructure modes for flexible network setup

PCMCIA Wireless G adapter

The TRENDnet TEW-421PC is a 32-bit CardBus Type II card that adds 802.11g wireless networking to a laptop. It operates on the 2.4 GHz band and delivers data rates up to 54 Mbps with automatic fallback to lower speeds. The card includes an integrated 2 dBi dual diversity antenna and supports WEP plus WPA security. It fits any notebook with a standard Type II PCMCIA slot.

For legacy notebook upgrades

This adapter suits owners of older laptops that lack built-in Wi-Fi or need a replacement for a failed internal card. It works in both ad-hoc peer-to-peer and infrastructure access-point modes. Buyers whose machines only have ExpressCard or M.2 slots cannot use this card. It also does not meet the needs of users who require 5 GHz operation or modern WPA2-AES encryption.

CardBus Type II interface

The single specification that determines compatibility is the 32-bit CardBus Type II interface. The laptop must provide a matching PCMCIA slot; newer ExpressCard, USB or internal M.2 connections are not compatible. Without this exact slot the adapter cannot be installed or used.

How it compares

Measured against everything we stock in Laptop Wireless & Network Cards, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 93% of the 100 comparable items (median $81.99).

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Specifications

Product
Brand nameTRENDnet
Model nameTEW-421PC
Product type802.11g PCMCIA Wireless Adapter
Audio & video
Audio channels1 to 11 channels (FCC),
1 to 13 channels (ETSI),
1 to 14 channels (MKK-Japan),
10 to 13 channels (France), 3 to 9 channels (Israel)
Connectivity
Supported standardsIEEE802.11b/g
Radio bands2.4 to 2.497 GHz (Industrial Scientific Medical Band)
Transmit power15dBm
Antenna configuration2dBi Integrated Microstrip Dual Diversity Antenna
Ports & slots
Interface type32bit CardBus Type II
Size & build
Product dimensions4.65 in × 2.1 in × 0.2 in
Product weight1.27 oz
Shipping weight0.91 kg
Package size193 × 137 × 33 mm
In the box
In the boxTEW-421PC
Quick Installation Guide
Resource Disk
Environment & compliance
Temperature range0ºC to 40ºC
Humidity range10-95%, Non-Condensing
More details
Maximum data rates54 Mbit/s
Security features64/128-bit WEP, WPA
ModulationCCK, DQPSK, DBPSK, OFDM

Questions about this item

Does the TEW-421PC CardBus adapter run hot when used continuously?

The adapter is rated for 0°C to 40°C operating temperature and draws power from the PCMCIA slot without a separate fan or heatsink.

My laptop only has a 32-bit CardBus Type II slot — is that enough for this card?

Yes, the TEW-421PC plugs directly into any 32-bit CardBus Type II slot and needs no external power or driver CD beyond the included resource disk.

Will this 802.11g card connect to my older 802.11b router at 11 Mbps?

It supports both IEEE 802.11g and 802.11b standards and automatically shifts down to 11, 5.5, 2 or 1 Mbps when linked to an 802.11b access point.

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