LAN9116-MT
LAN9116-MT - 10/100 Ethernet Controller | Microchip
Microchip LAN9116-MT is a single-chip 10/100 Ethernet controller with a parallel CPU interface for embedded systems requiring integrated network connectivity, flexible integration, and controlled system cost. It supports 10 Mbps and 100 Mbps Ethernet operation and interfaces with 16-bit or 32-bit embedded processors. The device is supplied in a 100-pin TQFP package measuring 14 x 20 mm. Its combination of an Ethernet controller, 10/100 Base-T/TX physical-layer interface, parallel host interface, and low host-CPU overhead makes it suitable for industrial controllers, embedded gateways, network management equipment, and compact connected products.
An Ethernet controller is an interface IC that connects a processor or embedded system to an Ethernet network. In the hardware hierarchy, a network interface controller includes the Ethernet MAC, host-facing bus interface, and physical-layer functions required for copper Ethernet communication. The LAN9116 family combines these functions in one device, reducing the number of external interface components needed when an embedded product requires 10/100 Ethernet rather than only a lower-level transceiver.
According to the Microchip LAN9116 datasheet, the controller is intended for embedded applications where performance, flexibility, integration ease, and system cost control are important. Its architecture targets 32-bit applications with medium-to-high performance requirements, while the parallel interface also supports connection to many 16-bit embedded processors. The documented 10/100 Base-T/TX capability allows a system to negotiate 10 Mbps or 100 Mbps operation, while the integrated controller architecture reduces the processing burden imposed on the host CPU.
The LAN9116-MT belongs to the LAN9116 product family and is offered as a 100-pin TQFP implementation. Its parallel host interface is intended to connect with embedded processor buses rather than using the serial interfaces associated with many newer Ethernet controllers. This makes it relevant to established embedded processor platforms where a proven parallel bus, compact 14 x 20 mm package, and integrated 10/100 Ethernet function can simplify a board-level design without requiring a separate PHY.
Typical applications include industrial Ethernet gateways, programmable controllers, factory automation equipment, embedded routers, print servers, set-top boxes, and network-enabled test equipment. The device is also appropriate for compact industrial control systems in which a 16-bit or 32-bit host processor needs deterministic access to Ethernet packet data. Designers should evaluate host-bus timing, magnetics selection, connector integration, and reference-circuit layout against the complete manufacturer datasheet before releasing production hardware.
The primary design consideration is that the LAN9116-MT integrates substantial networking functionality around a parallel host interface. Designers should use the manufacturer reference schematic and placement checklist as the basis for routing the processor interface, supplying the required clock and reset circuitry, and placing magnetics close to the physical-layer section. Input and output constraints, crystal requirements, termination, and decoupling must be verified directly from the manufacturer datasheet rather than inferred from the distributor description.
This page consolidates the verified manufacturer description, distributor package information, family comparisons, and practical selection guidance for LAN9116-MT. It also identifies where verified drop-in alternatives are not established, helping engineers distinguish documented family alternatives from unverified claims while reducing design, sourcing, and integration risk.
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