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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsMarvell announced its 88Q222xM automotive Ethernet PHY family on October 7, 2020, combining 100BASE-T1 and 1000BASE-T1 support with integrated MACsec security. It is a historical product announcement, not a new launch: Marvell completed the sale of its Automotive Ethernet business to Infineon on August 14, 2025, and says the business has moved to Infineon. Marvell’s sale-completion announcement and its automotive page establish the current ownership context.
What did Marvell announce?
The 88Q222xM family was designed for point-to-point automotive Ethernet links over unshielded twisted pair. Marvell’s October 7, 2020 announcement described two dual-speed PHYs, the 88Q2220M and 88Q2221M, with support for 100BASE-T1 and 1000BASE-T1 plus integrated IEEE 802.1AE MACsec. At launch, Marvell said both devices were sampling with development boards; that is launch-time status, not evidence of current availability. Marvell’s 2020 announcement is the source for those product details.
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Marvell called the device the “industry’s first” automotive gigabit Ethernet PHY with integrated MACsec and made performance claims in the same announcement. Those are the company’s promotional characterizations, not independently verified rankings or power measurements.
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A PHY, or physical-layer transceiver, sends and receives Ethernet signals across a physical link. In a vehicle network, an automotive single-pair Ethernet PHY handles signaling between connected network devices; it does not by itself define or secure every system above or beyond that link. The 88Q222xM was Marvell’s transceiver for 100- or 1000-megabit-per-second automotive links using one twisted pair.
#1 Best Overall
- - 1000M or 100M - USB-C or Barrel Plug - TE MATEnet, Rosenberger H-MTD, terminal block
What is 1000BASE-T1?
1000BASE-T1 is gigabit Ethernet over a single balanced pair, rather than the four pairs used by conventional 1000BASE-T cabling. Marvell listed IEEE 802.3bp compliance for 1000BASE-T1 and IEEE 802.3bw compliance for 100BASE-T1. The two speeds let a design use the same PHY family approach for different automotive link bandwidth requirements; the appropriate speed depends on the network segment and system design.
How does MACsec protect in-vehicle Ethernet?
MACsec is IEEE 802.1AE Media Access Control Security, a Layer 2 mechanism for protecting Ethernet traffic across a link. Marvell characterized the 88Q222xM implementation as hop-by-hop protection against threats including intrusion, man-in-the-middle attacks and replay attacks. That protection applies to the link where MACsec is implemented; it should not be treated as end-to-end security for an entire vehicle or as a replacement for broader network and system security measures.
Rank #2
- 🔌100BASE Ethernet Media Converter establishes a direct point-to-point conversion between automotive ECU's using 100BASE-T1(100 Mbit/s Fullduplex,) and any standard Fast Ethernet (100 Mbit/s, 100BASE-TX) device with an standard ethernet RJ45 connector.
- ⚙️100BASE Ethernet Media Converter comes with 1x TE MATEnet and 1x MOLEX adapter. Do not provide the over unshielded twisted pair (UTP) cables. No extra hardware or software is needed to connect the device with a PC or a Laptop.
- 🏆By using the NXP TJA1101 IEEE 802.3bw compliant ethernet PHY transceiver, ensure a trustworthy and effective tool to customers that are looking for a cost-efficient, quick and manageable solution for testing requirements, with no latency and no packet loss.
- 🛠️Features with 100BASE-T1 Master/Slave configuration and link LED. The design makes it portable and easy to install in test racks. The galvanized sheet steel with black powder coating housing makes it robust.
- 🚀Plug and Play, No need to install the drivers. No customized driver is needed to interact with our 100BASE-T1-TX-N Media Converter. The device communicates with standard Ethernet through an RJ-45 connector.
Marvell also listed IEEE 802.1AS and IEEE 802.1AS-Rev Precision Time Protocol support for network time synchronization. This timing capability is distinct from MACsec: one supports synchronized network timing, while the other provides link-level Ethernet security.
What do TC10 and partial networking add?
The announcement listed Open Alliance TC10 sleep/wake support. In partial networking, selected vehicle network segments can sleep while others remain active, then wake when needed. Marvell said TC10 control signals can travel over the data line, reducing the need for special remote-control cables. The release did not provide measured power savings, so no specific efficiency gain can be inferred from it.
Rank #3
- ⚡ Seamless Automotive to Standard Ethernet Bridge: Converts 100/1000BASE-T1 single-pair Ethernet to 100/1000BASE-TX Gigabit Ethernet with full-duplex 1Gbps speeds, auto-negotiation, and low-latency forwarding – ideal for in-vehicle diagnostics (DoIP), ADAS camera/radar debugging, and smart cockpit upgrades.
- 🔌 Robust H-MTD & RJ45 Interfaces: Features H-MTD Male (E6S20A-40MT5-Z) T1 port for automotive compatibility and RJ45 TX port; powered flexibly via USB Type-C (5V ±0.5V, ≤355mA) or DC Jack (6-30V) for versatile deployment in vehicles or industrial settings
- 🛡️ Industrial-Grade Reliability: Built to withstand -40°C to +85°C temperatures, 0-95% RH humidity, vibration, and EMI; includes over-voltage, over-current, and ESD protection for harsh environments like factories, fleet management, and outdoor automation
- 🌐 Advanced Networking Capabilities: Supports IEEE 802.3bw/802.3ab protocols, IEEE 802.1Q VLAN tagging, QoS prioritization, and enhanced security – ensures reliable data transmission in mixed automotive-IT networks
- 🔧 Compact Plug-and-Play Design: Measures just 50x20x83mm for easy integration; compatible with PC/ARM devices, Raspberry Pi, Linux/Windows OS; tested with iperf3 for TCP/UDP performance validation in real-world applications
What other specifications did Marvell list?
Marvell’s 2020 release listed the following automotive and integration features for the family:
- AEC-Q100 Grade 1 qualification over a stated temperature range of -40°C to 125°C.
- A 40-pin 6.0 × 6.0 mm QFN package and integrated voltage regulators.
- ASPICE Level 2 software.
These are specifications and claims in Marvell’s announcement; the release does not establish current support arrangements or lifecycle status for each SKU.
Rank #4
- ⚡ Seamless Automotive to Standard Ethernet Bridge: Converts 100/1000BASE-T1 single-pair Ethernet to 100/1000BASE-TX Gigabit Ethernet with full-duplex 1Gbps speeds, auto-negotiation, and low-latency forwarding – ideal for in-vehicle diagnostics (DoIP), ADAS camera/radar debugging, and smart cockpit upgrades
- 🔌 Robust MATENET & RJ45 Interfaces: Features MATENET (2302461-9) T1 port for automotive compatibility and RJ45 TX port; powered flexibly via USB Type-C (5V ±0.5V, ≤355mA) or DC Jack (6-30V) for versatile deployment in vehicles or industrial settings
- 🛡️ Industrial-Grade Reliability: Built to withstand -40°C to +85°C temperatures, 0-95% RH humidity, vibration, and EMI; includes over-voltage, over-current, and ESD protection for harsh environments like factories, fleet management, and outdoor automation
- 🌐 Advanced Networking Capabilities: Supports IEEE 802.3bw/802.3ab protocols, IEEE 802.1Q VLAN tagging, QoS prioritization, and enhanced security – ensures reliable data transmission in mixed automotive-IT networks
- 🔧 Compact Plug-and-Play Design: Measures just 50x20x83mm for easy integration; compatible with PC/ARM devices, Raspberry Pi, Linux/Windows OS; tested with iperf3 for TCP/UDP performance validation in real-world applications
How does 88Q222xM fit into Marvell’s later PHY announcements?
Marvell’s 2021 announcement added distinct MACsec-integrated products: the 88Q2233M dual 1000BASE-T1 PHY and the 88Q120xM 100BASE-T1 PHY. They provide portfolio chronology, but they are not variants of the 88Q222xM family. Marvell’s 2021 announcement lists these products and their features.
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Infineon owns the Automotive Ethernet business Marvell sold. Marvell announced completion of the $2.5 billion all-cash transaction on August 14, 2025, and its current automotive page says the business has moved to Infineon. The transaction figure is the announced consideration for the completed sale, not a price for the 88Q222xM device.
Best Value
- Establishes a direct point-to-point conversion between automotive ECU's using 1000BASE-T1(1000 Mbit/s Fullduplex,) and any standard Fast Ethernet (1000 Mbit/s, 1000BASE-TX) device with an standard ethernet RJ45 connector. Only supports 1000BASE communication, not compatible with 100BASE.
- By using the AEC-Q100 qualified TI DP83TG720SWRHATQ1 IEEE 802.3bp and Open Alliance compliant automotive Ethernet physical layer transceiver, ensure a trustworthy and effective tool to customers that are looking for a cost-efficient, quick and manageable solution for testing requirements, with no latency and no packet loss.
- Comes with 1x TE MATEnet and 1x MOLEX adapter. Do not provide the over unshielded twisted pair (UTP) cables.
- Features with 1000BASE-T1 Master / Slave configuration and an OLED screen. Support Cable open and short fault detection.
- Plug and Play, No need to install the drivers.Data pass-through is conducted without disrupting any network protocols.
The available launch announcement establishes that the 88Q2220M and 88Q2221M were sampling with development boards in 2020. It does not establish present-day stock, production lifecycle, or support status. Design teams evaluating the part should confirm current product and support information with the business now responsible for it rather than assume the 2020 sampling status still applies.
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