NOTE:  There are no U.S. cellular equipment manufacturers.  The only two in the west are Ericcson and Nokia- both based in Europe.  However, U.S. based Qualcomm has been developing 5G silicon and is the only 5G (fabless) semiconductor vendor in the U.S.  They will likely have an IMT 2020 compliant chip set as the company regularly attends ITU-R WP 5D meetings.  The only other 5G merchant market semiconductor company we know of is Taiwan based MediaTek.  Samsung and Huawei have developed 5G silicon but are using it ONLY for their own devices- not sold to merchant semiconductor market.

The only U.S. semiconductor companies that we know of that make their own chips are Intel and Micron.

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IHS Markit says Huawei fall- out on memory market is huge:

Huawei in recent years has carved out prominent positions in the global smartphone and mobile infrastructure markets (not to mention fiber optics infrastructure and IT markets).  In 2018, Huawei rose to take second place in the smartphone business, with 206.1 million shipments, according to the IHS Markit Smartphone Intelligence Service. This put it just slightly ahead of Apple, at 204.7 million.

In 2017, the company  became the leader in the worldwide mobile infrastructure equipment market, surpassing Ericsson. Huawei has retained the top position and rose to account for nearly one-third of the market, with a 31 percent share of global revenue in 2018, as reported by the IHS Markit Mobile Infrastructure Intelligence Service.

Huawei’s market position has translated directly into purchasing power, with the company ranking as the world’s fourth-largest OEM semiconductor buyer in 2018.  Huawei spent $15.9 billion on semiconductors in 2018, according to the IHS Markit OEM Semiconductor Spending & Design Activity Intelligence Service. Memory represents a considerable slice of that spending, with the company buying $1.7 billion worth of DRAM and $1.1 billion worth of NAND flash memory for the year.

In the memory business, the wireless communications market was the second-largest global market for DRAM in 2018, following computer platforms, with revenue of $21.3 billion. Wireless was also the second largest market for NAND flash memory after computers, with revenue of $14.6 billion in 2018.   HDD and solid-state drive (SSD) products enjoy major usage in the enterprise segment where Huawei operates. The enterprise market generated 72.8 million HDD unit shipments in 2018, while SDD demand amounted to 34 million, according to the IHS Markit HDD and SDD Storage Intelligence Service.  For Micron and Western Digital, the revenue lost because of the ban is not likely to be replaced easily or quickly.

IHS-Markit says No Winners:

While the ban was ostensibly designed to penalize Huawei and benefit the U.S. tech industry, the reality is the pain will be felt by companies on both sides of the Pacific, affecting key U.S. suppliers along with Huawei.​