CP21xx Smart Interface ICs

Silicon Labs CP21xx Smart Interface ICs leverage Silicon Labs' world-class mixed-signal design expertise to provide a family of high-performance interface devices that enable designers to differentiate their products and speed time-to-market. These mixed-signal IC products span different technologies and standards to enable quick and effective communication between two devices or functionalities. These devices include USB to UART bridges, ISB to I2S digital audio bridges, HID USB to SMBus/I2C bridges, and SPI to I2C bridge with GPIO port expanders, and USB to SPI bridges.

Types of Interface ICs
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Results: 22
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 Mfr.
Description Datasheet Availability Pricing (GBP) Filter the results in the table by unit price based on your quantity.
Qty. RoHS Product Type
Product
Type
Interface Type
Mounting Style
Package/Case
Silicon Labs I/O Controller Interface IC HID USB to UART Bridge QFN24
Datasheet
26,166In Stock
Min.: 1
Mult.: 1

I/O Controller Interface IC SMD/SMT QFN-24

Silicon Labs I/O Controller Interface IC USB to Quad UART Bridge QFN64
Datasheet
2,506In Stock
Min.: 1
Mult.: 1

I/O Controller Interface IC I/O Controllers USB to Quad UART Bridge Serial SMD/SMT QFN-64

Silicon Labs I/O Controller Interface IC USB to Quad UART Bridge QFN64
Datasheet
4,986In Stock
15,000Expected 28/07/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

I/O Controller Interface IC SMD/SMT QFN-64
Silicon Labs USB Interface IC HID USB to SMBUS Bridge QFN24
Datasheet
5,808In Stock
Min.: 1
Mult.: 1

USB Interface IC USB Controllers Bridge, USB to SMBus SMBus, USB SMD/SMT QFN-24
Silicon Labs USB Interface IC HID USB to SMBUS Bridge QFN24
Datasheet
6,169In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

USB Interface IC USB Controllers Bridge, USB to SMBus SMBus, USB SMD/SMT QFN-24
Silicon Labs USB Interface IC USBXpress - USB to UART Bridge QFN20
Datasheet
17,479In Stock
12,600Expected 19/02/2027
Min.: 1
Mult.: 1

USB Interface IC USB Controllers Bridge, USB to UART UART SMD/SMT QFN-20
Silicon Labs USB Interface IC USBXpress - USB to UART Bridge QFN24
Datasheet
7,582In Stock
22,932On Order
Min.: 1
Mult.: 1

USB Interface IC USB Controllers Bridge, USB to UART UART SMD/SMT QFN-24
Silicon Labs USB Interface IC USBXpress - USB to UART Bridge QFN20
Datasheet
47,545In Stock
63,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

USB Interface IC USB Controllers Bridge, USB to UART UART SMD/SMT QFN-20
Silicon Labs I/O Controller Interface IC USB to UART Bridge QFN28
Datasheet
2,707In Stock
4,599Expected 18/09/2026
Min.: 1
Mult.: 1

I/O Controller Interface IC SMD/SMT MLP-28
Silicon Labs I/O Controller Interface IC USB to UART Bridge QFN28
Datasheet
2,887In Stock
4,500Expected 30/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

I/O Controller Interface IC SMD/SMT MLP-28
Silicon Labs I/O Controller Interface IC USB to UART Bridge QFN24
Datasheet
1,544In Stock
1,911Expected 30/07/2026
Min.: 1
Mult.: 1

I/O Controller Interface IC SMD/SMT QFN-24
Silicon Labs I/O Controller Interface IC USB to Dual UART Bridge QFN24
Datasheet
2,981In Stock
5,733Expected 30/07/2026
Min.: 1
Mult.: 1

I/O Controller Interface IC SMD/SMT QFN-24

Silicon Labs I/O Controller Interface IC HID USB to UART bridge
Datasheet
4,023In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

I/O Controller Interface IC HID USB to UART Bridges UART SMD/SMT QFN-24
Silicon Labs I/O Controller Interface IC HID USB to UART Bridge QFN28
Datasheet
694In Stock
Min.: 1
Mult.: 1

I/O Controller Interface IC SMD/SMT QFN-28

Silicon Labs I/O Controller Interface IC HID USB to UART bridge
Datasheet
3,314In Stock
Min.: 1
Mult.: 1
: 1,500

I/O Controller Interface IC HID USB to UART Bridges UART SMD/SMT QFN-28
Silicon Labs USB Interface IC USBXpress - USB to UART Bridge QFN28
Datasheet
3,133In Stock
54,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

USB Interface IC USB Controllers Bridge, USB to UART UART SMD/SMT QFN-28
Silicon Labs USB Interface IC USBXpress - USB to UART Bridge QFN28
Datasheet
58In Stock
22,995Expected 05/02/2027
Min.: 1
Mult.: 1

USB Interface IC USB Controllers Bridge, USB to UART UART SMD/SMT QFN-28
Silicon Labs USB Interface IC USBXpress - USB to UART Bridge QFN24
Datasheet
306In Stock
66,000Expected 05/02/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

USB Interface IC USB Controllers Bridge, USB to UART UART SMD/SMT QFN-24
Silicon Labs I/O Controller Interface IC USB to UART Bridge QFN24
Datasheet
22,480On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

I/O Controller Interface IC USB to UART Bridges UART SMD/SMT QFN-24
Silicon Labs I/O Controller Interface IC USB to Dual UART Bridge QFN24
Datasheet
12,831Expected 30/07/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

I/O Controller Interface IC USB to Dual UART Bridges UART SMD/SMT QFN-24
Silicon Labs USB Interface IC USB to UART Bridge QFN28
Datasheet
65,406On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

USB Interface IC USB Controllers Bridge, USB to UART USB, UART SMD/SMT QFN-28
Silicon Labs USB Interface IC USB to UART Bridge QFN28
Datasheet
Non-Stocked Lead-Time 29 Weeks
Min.: 1,533
Mult.: 1,533

USB Interface IC USB Controllers Bridge, USB to UART USB, UART SMD/SMT QFN-28