On Semiconductor has agreed to buy Synaptics in a nearly $7 billion all-stock deal to bolster its push into physical artificial intelligence technology. The Arizona-based company said the deal will give its total addressable market a $30 billion boost to $243 billion by 2030 and strengthen its intelligence systems portfolio. It's also the company's largest deal to date. Shares of On Semi fell about 6% after the bell, while Synaptics rallied about 13%. "This transaction would add immediate