Infineon's MAC footprint spans IEEE registrants that should be aliased to one family: "Infineon AG" (sample 00:03:19) and the legacy "CYPRESS SEMICONDUCTOR" (sample 00:A0:50). The registered addresses are in Germany (Infineon; corporate HQ Neubiberg) and San Jose, CA (Cypress legacy). These OUIs appear on Wi-Fi/Bluetooth chipsets, PSoC microcontrollers, and security chips. The lineage is the key context: Broadcom's IoT/WICED Wi-Fi business went to Cypress in 2016, and Infineon then acquired Cypress — announced 3 June 2019 at about $10 billion (€9.0 billion) enterprise value, closing 16–17 April 2020 — so the same Wi-Fi/BT silicon line now sits under Infineon. Cypress likely holds additional blocks under other name variants (e.g., "Cypress Semiconductor Corporation") not enumerated under the exact "CYPRESS SEMICONDUCTOR" page. The key analyst point is the chipset pattern: a Cypress/Infineon OUI may identify a device built on their Wi-Fi/BT silicon regardless of brand. For triage, a Cypress/Infineon OUI on smart-home or IoT gear often flags their Wi-Fi/BT silicon (the ex-Broadcom WICED line) rather than the device brand.
- IEEE assignment
- multiple entities — "Infineon AG" (sample 00:03:19), legacy "CYPRESS SEMICONDUCTOR" (sample 00:A0:50) [Confirmed]; additional Cypress name variants likely exist [Likely] — IEEE MA-L
- Registry / block size
- MA-L [Confirmed] — maclookup.app (IEEE-sourced)
- HQ / country
- Infineon Germany (corporate HQ Neubiberg); Cypress legacy San Jose, CA, US [Confirmed/Likely] — maclookup.app
- Company status
- active (Infineon); Infineon acquired Cypress (announced 2019-06-03, ~$10B / €9.0B EV; closed 2020-04-16/17) [Confirmed] — Cypress SEC 8-K
- Device types
- Wi-Fi/BT chipsets, PSoC microcontrollers, security chips [Confirmed] — maclookup.app
- Notable products
- ex-Broadcom WICED Wi-Fi/BT silicon; PSoC MCUs; security chips
- Verified prefix sample
- 00:03:19 (Infineon AG); 00:A0:50 (CYPRESS SEMICONDUCTOR) [Confirmed] — maclookup.app
- Special note
- Lineage is Broadcom IoT/WICED Wi-Fi → Cypress (2016) → Infineon (2020). A Cypress/Infineon OUI may identify a device built on their Wi-Fi/BT silicon regardless of brand. Cypress likely holds additional blocks under other name variants not enumerated under the exact "CYPRESS SEMICONDUCTOR" page. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- Cypress Semiconductor (acquired 2020); Broadcom (former owner of the WICED Wi-Fi line, sold to Cypress 2016)
- Analyst note
- A Cypress/Infineon OUI on smart-home/IoT gear often flags their Wi-Fi/BT silicon (ex-Broadcom WICED), not the device brand.