KSZ8091RNDCA-TR

KSZ8091RNDCA-TR is a standalone 10/100 Mbps Ethernet PHY transceiver from Microchip (Micrel). It provides the physical layer between a MAC (in your MCU/SoC) and the Ethernet cable (RJ45 with magnetics). Interfaces: MAC side supports MII or RMII; management via MDIO/MDC. Features: supports 10/100BASE-TX, auto-negotiation (speed and duplex), link detection, Auto-MDI/MDIX, and operation in full- or half-duplex modes; designed for low power in embedded designs. Packaging: the -TR suffix indicates tape-and-reel packaging for manufacturing. Typical applications: embedded Ethernet designs in industrial controllers, IoT gateways, and other networked devices needing a reliable 10/100 PHY. For exact electrical specs, pinout, timing, and register details, refer to the KSZ8091RNDCA datasheet from Microchip.

KSZ8091RNDCA-TR is a single‑port 10/100 Mbps Ethernet PHY. Key features include:
- 10/100BASE-TX PHY with auto-negotiation and auto-MDIX
- MAC interface options: MII or RMII (selectable)
- Full/half‑duplex operation with IEEE 802.3x pause flow control
- IEEE 802.3u compliant; supports Energy Efficient Ethernet (EEE)
- Robust galvanic isolation and protection on Ethernet lines (typical PHY isolation for safety)
- ESD protection on RJ-45 interface
- Low‑power modes suitable for embedded/industrial use
- Wide operating conditions (industrial temperature range)
- RoHS-compliant, compact packaging and easy integration
Note: exact package type and electrical specs vary by revision; verify datasheet for package details and pinout.

Pin count: 28 pins (QFN-28).
Function: KSZ8091RNDCA-TR is a 10/100 Mbps Ethernet PHY (IEEE 802.3) with MII/RMII MAC interface. It provides MDIO/MDC management, LED outputs for link/activity, and requires a 50 MHz reference clock input, along with power and ground pins.

- Manufacturer: Microchip Technology Inc. (the KSZ8091RNDCA-TR is part of Microchip’s KSZ 10/100 Ethernet PHY family; originally from Micrel, now under Microchip after its acquisition).
- What kind of company: An American multinational semiconductor company that designs, develops, and manufactures microcontrollers, memory, analog, and interface ICs for embedded systems.

KSZ8091RNDCA-TR is a 10/100 Mbps Ethernet PHY for connecting MCUs/SoCs to an Ethernet network. Typical application areas:
- Embedded systems with RMII/MII interfaces needing a 10/100 PHY
- Industrial automation and control networks
- Consumer electronics (printers, scanners, set-top boxes)
- Networked peripherals (IP cameras, POS terminals, NAS)
- Small office/Home office networking devices (routers, gateways, access points)

8-pin MSOP package (MSOP-8); Tape & Reel, as indicated by the -TR suffix.