乙太網路 PHY
產品（2)
KSZ8041MLL - 10/100 Ethernet PHY | Microchip | MII
The Microchip Technology KSZ8041MLL is a single-port 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with a full MII host interface, supplied in a 48-LQFP 7 x 7 mm package. It supports 10 Mb/s and 100 Mb/s Ethernet operation from a single 3.3 V supply. The device interfaces with an Ethernet media-access controller through MII, RMII, or SMII-compatible signaling and provides the physical-layer functions required to connect a digital controller to a 10/100 Ethernet network. An Ethernet PHY is a physical-layer transceiver within the broader Ethernet interface hierarchy. It converts digital frame data from a MAC controller into physical signals suitable for twisted-pair cabling and recovers those signals at the receiving endpoint. The KSZ8041 family combines a mixed-signal PHY implementation with configurable operating modes, reducing board area and power consumption while preserving compatibility with conventional Ethernet controller interfaces. Key features include support for 10BASE-T and 100BASE-TX links, full MII support on the MLL version, a single 3.3 V supply, and an integrated 48-pin LQFP package measuring 7 x 7 mm. The family also supports automatic crossover-related functions identified by Microchip as HP Auto MDI/MDIX. Configuration strapping pins establish speed, duplex, auto-negotiation, power-down behavior, and PHY-address settings when the device starts or resets. The mixed-signal architecture is central to the KSZ8041 implementation. Analog transmit and receive circuitry works with the digital MAC-facing interface, allowing the same PHY family to support copper links at 10 Mb/s or 100 Mb/s. MII provides a parallel data path between the PHY and controller, while the broader KSZ8041 family is documented with RMII and SMII interface support. Designers must still verify the exact interface and strap requirements of the selected ordering code against the manufacturer datasheet. Typical uses include embedded Ethernet ports, industrial controllers, communications equipment, network interface adapters, and systems using a Microchip-compatible 10/100 Ethernet controller. The KSZ8041MLL is especially relevant to designs that require the basic MII-supported PHY in a 48-LQFP surface-mount package rather than the TL or FTL ordering options described as TQFP packaged in the manufacturer data sheet. Layout is critical because the device combines high-speed digital interface signals with sensitive analog receive and transmit circuits. Follow the manufacturer's hardware design checklist, keep the PHY and magnetics interface area tightly controlled, provide the required decoupling, and avoid routing sensitive analog traces beneath digital or high-current paths. Verify magnetics, termination, reset, strap, and crystal or clock requirements before releasing the PCB. This page consolidates the verified distributor description, manufacturer data-sheet identification, package information, hardware-design guidance, and application-oriented engineering considerations. It also distinguishes the basic MII MLL variant from related KSZ8041 ordering codes and identifies where package, electrical, lifecycle, or compliance details require confirmation from the latest Microchip documentation.
KSZ8041NL-TR - 10/100 Ethernet PHY, MII/RMII, 32-QFN | Microchip
The Microchip KSZ8041NL-TR is a single-supply 10BASE-T/100BASE-TX physical layer (PHY) transceiver that provides MII and RMII MAC interfaces, housed in a 32-pin QFN (5x5 mm) package with HP Auto-MDIX support. The device operates from a single 3.3V supply (3.135V to 3.465V), supports 10/100 Mbps data rates per IEEE 802.3 and IEEE 802.3u, and integrates the line-side magnetics interface as well as baseline wander correction to extend signaling distance. A PHY (physical layer device) is the lowest tier of the Ethernet OSI stack, sitting just above the transformer/MDI and below the MAC layer. It handles line coding (MLT-3 / 4B5B), link training, auto-negotiation, and clock recovery. Within a typical embedded Ethernet design, a PHY sits between the magnetics plus RJ45 jack and an Ethernet MAC, either inside a microcontroller or as a separate controller; engineers select a discrete PHY when the host MCU/MAC lacks 10/100 support, when isolation or industrial temperature range is required, or when a broader MAC/PHY ecosystem has been validated for a given application. Key features of the KSZ8041NL-TR include 1/1 transceiver configuration with full MII and RMII MAC-side interfaces (SMII supported on the KSZ8041RNL version), HP Auto-MDIX crossover correction that eliminates the need for crossover cables, on-chip 1.8V regulator that can optionally power the MAC, low-power energy-detect mode, and linkMD cable diagnostics for opens, shorts, and cable length estimation. The mixed-signal design reportedly reduces power consumption versus competing 100 Mbps PHYs. Architecturally, the KSZ8041NL uses a DSP-based echo canceller and adaptive equalizer to achieve robust 100BASE-TX performance over CAT-5 cable, with HP Auto-MDIX implemented in the analog front end to autonegotiate polarity and pair roles. The MAC interface supports both MII (25 MHz reference clock at 100 Mbps) and RMII (50 MHz reference clock shared between MAC and PHY), enabling pin-compatible use with a wide range of microcontrollers. Typical applications include set-top boxes and IPTV gateways, network-capable printers and MFPs, industrial Ethernet sensors and PLCs, gaming consoles, and any embedded design that needs a 10/100 Ethernet port without a built-in PHY. The QFN-32 (5x5 mm) small footprint also suits space-constrained consumer and IoT appliances. When laying out this part, give the 50 MHz RMII clock trace a short, matched-length path to both the MAC and the PHY, and follow Microchip's KSZ8041NL Hardware Design Checklist for RJ45 magnetics pairing; do not skip the center-tap capacitor network on each line-side pair. This page compiles distributor pricing, drop-in alternatives, and PCB design notes not found in the bare datasheet, helping engineers select and place the KSZ8041NL-TR quickly.