The company made the disclosure during an analysts' call after the announcement of its second-quarter results on Thursday, The Wall Street Journal reported.
Broadcom is the first semiconductor maker to announce any results since the ban on Huawei using American-made components in its products was put in place on 16 May.
Chief executive Hock Tan said the company had made about US$900 million from sales to Huawei in the previous financial year, about 4.3% of its revenue for that year.
“With respect to semiconductors it is clear that the US-China trade conflict, including the Huawei export ban, is creating economic and political uncertainty and reducing visibility for global [manufacturing] customers."
Other smaller semiconductor firms like Qorvo and Lumentum have both revised their quarterly revenue guidance down by about US$50 million each.
Analog Devices, a bigger company in the same line, said in May that revenue for its third quarter would be about US$100 million below what analysts predict.
The US Government placed Huawei and 68 of its affiliates on its Entity List on 16 May, meaning that the company would have to seek permission to purchase any American components it needed to manufacture its products.
Four days later, Google announced it was cutting off Huawei's access to future updates of Google's Android and Google Play Store.
Huawei, which is now the second biggest smartphone vendor globally after Samsung, uses a customised version of Android on all its smartphones and tablets.
On 21 May, the US Commerce Department eased some of the restrictions until August, allowing Huawei to maintain and update existing networks and handsets.