AM79C981 Datasheet PDF | Advanced Micro Devices

Advanced Micro Devices AM79C981

The Am79C981 provides eight integral twisted-pair medium attachment units (MAUs) and an attachment unit interface (AUI) port in an 84-pin plastic leaded chip carrier (PLCC). The total number of ports per repeater unit can be increased by connecting multiple IMR+ devices through Publication# 17306 Rev: B Amendment/0 Issue Date: January 1999 their expansion ports, minimizing the total cost per repeater port.

Part No.	AM79C981
Datasheet	AM79C981 Download
Manufacturer	Advanced Micro Devices
Description	Integrated Multiport Repeater
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GENERAL DESCRIPTION

The Integrated Multiport Repeater Plus (IMR+) chip is a VLSI circuit that provides a system-level solution to designing a compliant 802.3 repeater incorporating 10BASE-T transceivers. The device integrates the Repeater functions speciﬁed by Section 9 of the IEEE 802.3 standard and Twisted-Pair Transceiver functions complying with the 10BASE-T standard. A network based on the 10BASE-T standard uses unshielded twisted-pair cables, thereby providing an economical solution to networking by allowing the use of low-cost unshielded twisted-pair (UTP) cable or existing telephone wiring. Furthermore, a general-purpose attachment unit interface (AUI) provides connection capability to 10BASE-5 (Ethernet) and 10BASE-2 (Cheapernet) coaxial networks, as well as 10BASE-F and/or Fiber Optic Inter-Repeater Link (FOIRL) ﬁber segments. Network management and test functions are provided through TTL-compatible I/O pins. The IMR+ device interfaces directly with AMD’s Am79C987 Hardware Im...