Atmel AT76C503/505 USB 802.11b Wi-Fi Adapters
An early-2000s family of USB Wi-Fi dongles built around Atmel's AT76C503, AT76C505, and AT76C505A chipsets, supporting only the original 802.11b standard at up to 11 Mbps. They were sold under many retail brand names during the first wave of consumer wireless networking and are long obsolete for new deployments.
recommendation
Worth keeping but flagging as legacy. The hardware is early-2000s 802.11b-only USB Wi-Fi dongles that nobody sells new today and that very few people still run, but the code is genuinely maintained: a use-after-free fix landed via stable in 2025 and a refactor was posted in 2026, so there is no upstream momentum to remove it. A clear note that this is legacy hardware would help users and packagers without disrupting the handful of remaining deployments.
repository signals
sources
- lore.kernel.org
Recent upstream work still touches this driver in 2026 ('wifi: at76c50x: refactor endpoint lookup'), indicating maintenance rather than abandonment/removal.
- lore.kernel.org
The driver received a stable backport in 2025 for a use-after-free fix, showing real bug-fix traffic for supported kernels.
- wireless.docs.kernel.org
Kernel wireless docs describe at76c50x-usb as supporting only Atmel at76c50x chipsets and only 802.11b.
- cateee.net
LKDDb shows the module still exists upstream and enumerates many early-2000s 802.11b USB dongles tied to this driver.
- electronicsweekly.com
Contemporary reporting places the AT76C503 family in the 2000-era 802.11b market, supporting the conclusion that this hardware is long obsolete for new deployments.
codex reasoning notes (technical)
Real driver: local shell read of at76c50x-usb.c and Kconfig shows a USB WLAN driver for Atmel AT76C503/505/505A. Upstream activity was checked with lore_file_timeline; recent lore URLs show 2025 stable fixes and 2026 cleanup/refactor patches, so there is no evidence here of an active removal push and the driver is still maintained. Deployment evidence came from web search results: wireless.docs.kernel.org and LKDDb both identify these as 802.11b-only legacy USB adapters across old retail brands, and the 2000 Electronics Weekly article anchors the chipset family to an early-2000s market window. That combination suggests hardware is not still sold new in 2025 and current deployments are low, but maintenance traffic argues against deprecation/removal now; annotate as legacy instead.