AM79C983A Datasheet | Advanced Micro Devices

DESCRIPTION The Am79C983A Integrated Multiport Repeater 2 (IMR2) chip is a VLSI integrated circuit that provides a system-level solution to designing intelligent (managed) multiport repeaters. When the IMR2 device is bined with the Quad Integrated Ethernet Transceiver (Qu IET) device, it provides a cost-effective solution to designing 10BASE-T managed repeaters. The IMR2 device integrates the repeater functions specified by Section 9 (Repeater Unit) and Section19 (Layer Management for 10 Mb/s Baseband Repeaters) of the IEEE 802.3 standard. The Am79C983A IMR2 device provides 1 standard Attachment Unit Interface (AUI) port, 12 Pseudo Attachment Unit Interface (PAUI) por ts, and 1 Reversible AUI (RAUI) port for direct connection to a media access controller (MAC). The pseudo AUI ports can be connected to external transceivers to support multiple media types, including 10BASE2, 10BASE-T, and 10BASE-FL/FOIRL. The pseudo AUI ports can be turned off individually (without external circuitry) to...