LAN91C96I

The LAN91C96I is a VLSI Ethernet Controller that combines Local Bus interfaces in one chip. LAN91C96I  integrates all MAC and physical layer functions, as well as the packet RAM, needed to implement a high  performance 10BASE-T (twisted pair) node. For 10BASE5 (thick coax), 10BASE2 (thin coax), and  10BASE-F (fiber) implementations, the LAN91C96I interfaces to external transceivers via the provided AUI  port. Only one additional IC is required for most applications. The LAN91C96I comes with Full Duplex  Switched Ethernet (FDSWE) support allowing the controller to provide much higher throughput. 6K bytes  of RAM is provided to support enhanced throughput and compensate for any increased system service  latencies. The controller implements multiple advanced powerdown modes including Magic Packet to  conserve power and operate more efficiently. The LAN91C96I can directly interface with the Local Bus and  deliver no-wait-state operation. For Local Bus interfaces, the LAN91C96I occupies 16 I/0 locations and no  memory space.

The same I/O space is used for Local Bus operations.  Its shared memory is sequentially accessed with  40ns access times to any of its registers, including its packet memory.  DMA services are not used by the  LAN91C96I, virtually decoupling network traffic from local or system bus utilization. For packet memory  management, the LAN91C96I integrates a unique hardware Memory Management Unit (MMU) with  enhanced performance and decreased software overhead when compared to ring buffer and linked list  architectures.  The LAN91C96I is portable to different CPU and bus platforms due to its flexible bus  interface, flat memory structure (no pointers), and its loosely coupled buffered architecture (not sensitive to  latency).

The LAN91C96I is available in 100-pin QFP and TQFP (1.0 mm body thickness) packages; green, lead- free packages are also available.  The low profile TQFP is ideal for mobile applications such as PC Card  LAN adapters.  The LAN91C96I operates with a single power supply voltage of 5V or 3.3V.  The industrial  temperature range for LAN91C96I is -40 to 85.