LAN91C110-PU

Controllers Overview

The LAN91C110-PU is a Fast Ethernet controller designed for PCMCIA and generic 16-bit applications. It implements the Media Access Control (MAC) portion of the CSMA/CD protocol at 10 Mbps and 100 Mbps speeds, compliant with IEEE 802.3 100BASE-T specifications. The device features a 16-bit wide data path into packet buffer memory and supports 16 and 8-bit CPU accesses via an asynchronous bus interface adaptable to ISA and PCMCIA interfaces. It includes 128 Kbytes of external memory, equivalent to 64 outstanding packets, managed by a flat MMU architecture. The controller provides an IEEE-802.3 MII MAC-PHY interface running at nibble rate and operates in a 144-pin TQFP lead-free RoHS compliant package.

Controllers Feature Summary

• Dual-speed CSMA/CD engine supporting 10 Mbps and 100 Mbps transmission rates
• Generic 16-bit system-level interface adaptable to various CPU buses including ISA and PCMCIA
• Flat Memory Management Unit architecture with symmetric transmit and receive structures
• IEEE-802.3 MII compliant MAC-PHY interface with serial management capability

Controllers Applications

• Second generation Fast Ethernet PC Card adapters
• Non-PCI connectivity products
• Systems based on system buses other than PCI

Controllers Procurement Notes

Verify the specific revision status of the LAN91C110-PU component before procurement, as documentation indicates it may be a product preview. Confirm that the 144-pin TQFP package dimensions align with your PCB footprint requirements. Ensure compatibility with existing LAN9000 drivers if software migration is planned. Check for any updated anomaly sheets or specification changes from the manufacturer prior to finalizing orders.

Controllers Selection Notes

Select this controller for designs requiring a non-PCI Fast Ethernet solution with a 16-bit host interface. It is suitable for environments where ISA or PCMCIA bus architectures are utilized. Consider the 128 Kbyte external memory requirement when designing the system board. Verify that the target application can accommodate the 144-pin TQFP package size and pinout configuration.

Controllers Part Context

The LAN91C110 belongs to the FEAST family of Fast Ethernet controllers developed by SMSC, now part of Microchip Technology. This series targets embedded systems needing high-performance Ethernet connectivity without relying on PCI buses. The LAN91C110 specifically addresses the need for PCMCIA and generic 16-bit bus integration, offering software compatibility with legacy LAN9000 drivers to simplify development cycles.

Controllers Replacement Considerations

Public confirmed substitute part numbers: None identified.