AMD LANCE Am7990

The Am7990 is an Ethernet media access controller (MAC) controller introduced in 1985.[1][2] LANCE, short for "local area network controller for Ethernet", is also the brand name for follow-up versions of the chip. Its architecture is the basis for AMD's PCnet family of highly integrated single-chip Ethernet controllers, which succeeded the LANCE family. The one exception is the Am79C940 MAC. The Am7990 chip was fabricated in NMOS technology and has no integrated Manchester encoder/decoder (ENDEC) nor does it have an integrated 10BASE-T transceiver.

AMD Am7990 Lance die
Typical application with Am7990 MAC on the left next to Am7992 Manchester encoder/decoder (Serial Interface Adapter) and AUI isolation transformer in the bottom right.
  1. ^ "Net186 Demonstration Board User's Manual" (PDF). Retrieved 22 January 2021. AMD.com – TechDocs
  2. ^ "Am79C90 : CMOS Local Area Network Controller for Ethernet (C-LANCE)" (PDF). AMD – TechDocs. Archived from the original (PDF) on 20 September 2021. Retrieved 22 January 2021.