LAN91C93I-MU

Controllers Overview

The LAN91C93I-MU is a non-PCI single-chip full duplex Ethernet controller manufactured by Microchip Technology (originally SMSC). It integrates MAC and physical layer functions with 6K bytes of on-chip packet RAM. The device supports IEEE 802.3 standards, featuring an integrated 10BASE-T transceiver and AUI interface for external connections. It operates at 10 Mb/s with full duplex capability and utilizes a local bus interface with 16-bit data paths. The component is housed in a 100-pin TQFP package with a 1.0 mm body thickness.

Controllers Feature Summary

• Integrates a hardware Memory Management Unit (MMU) for dynamic memory allocation between transmit and receive queues without CPU intervention.
• Supports simultaneous early transmit and early receive functions to enhance throughput in switched Ethernet environments.
• Provides direct local bus interface compatibility with no wait states and handles block word transfers for any alignment.
• Includes automatic detection of TX/RX polarity reversal and link integrity test functions within the integrated transceiver.

Controllers Applications

• Network Interface Controllers for PC Card or mobile applications requiring low profile packaging.
• Industrial temperature range embedded systems utilizing local bus architectures.
• Full duplex switched Ethernet nodes requiring high performance chained packet handling.

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and environmental compliance. The 'MU' suffix denotes a green, lead-free 100-pin TQFP package. Ensure that the source document explicitly lists this part number as available from the manufacturer or authorized distributors before finalizing procurement plans.

Controllers Selection Notes

Select the LAN91C93I-MU when a non-PCI local bus interface is required for 10 Mbps Ethernet connectivity. This model is suitable for designs needing integrated 10BASE-T transceivers and AUI support. Consider the 100-pin TQFP form factor for space-constrained mobile or industrial applications where lead-free compliance is mandatory.

Controllers Part Context

The LAN91C93I belongs to the LAN91C9x family of non-PCI Ethernet controllers. It shares software compatibility with the LAN91C92, LAN91C94, and LAN91C96 in local bus mode. The primary distinction of the LAN91C93I is its extended 6K byte packet RAM compared to earlier variants, supporting enhanced performance for full duplex traffic.

Controllers Replacement Considerations

Publicly confirmed substitutes include the LAN91C93I-MC (100-pin QFP), LAN91C93I-ME (100-pin TQFP), and LAN91C93I-MS (100-pin QFP green/lead-free). Verify pinout and package dimensions if replacing the MU variant with other packages in the same series.