| Pacific Monolithics |
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| Panasonic (Matsushita) |
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| Parrot |
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| Parthus |
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| Patriot Scientific |
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| Paxonet Communications (-> Conexant) |
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| Peregrine Semiconductor |
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| Performance Motion Devices (PMD) |
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| Performance Semiconductor |
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| Pericom |
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| Perkin Elmer Optoelectronics |
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| PhaseLink (PLL) |
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| Philips |
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| Philsar Electronics (-> Conexant) |
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| Photobit |
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| PixArt Imaging |
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| Pixelworks |
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| Pixim |
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| Plastic Logic |
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| PLX Technology |
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| PMC-Sierra |
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| Pointchips |
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| Polyfet RF Devices |
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| Power Innovations (-> Bourns) |
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| Power Integrations |
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| Powerchip Semiconductor (PSC) |
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| PowerDsine |
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| Powerex |
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| PowerSmart (-> Microchip) |
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| PowerTech |
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| PrairieComm |
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| Precision Monolithics (PMI) (-> Analog Devices) |
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| Prema Semiconductor |
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| Primarion |
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| Princeton Technology (PTC) |
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| Protek Devices |
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| PulseCore (-> Alliance) |
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| Pyramid Semiconductor |
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