Collection: I/O Expanders - Serial Interface Peripheral Expansion ICs

Enhance embedded system capabilities with serial interface I/O expanders designed to multiply peripheral connections for microcontrollers (MCUs) and microprocessors (MPUs). These devices enable cost-effective signal expansion using minimal host I/O lines—ideal for applications prioritizing connectivity over ultra-high-speed communication.

Key Features of I/O Expander ICs

Our I/O expander portfolio delivers flexible peripheral expansion through industry-standard serial interfaces including I²C, SPI, and parallel bus architectures. These integrated circuits provide additional GPIO pins, interrupt handling, and programmable configuration options to extend microcontroller capabilities without requiring additional processor resources.

Applications Across Critical Industries

I/O expanders serve essential roles in aerospace avionics systems, automotive body control modules, industrial automation controllers, medical device interfaces, and telecommunications infrastructure. These components enable scalable system architectures while maintaining signal integrity and reducing board complexity in space-constrained designs.

Technical Specifications & Performance

Available configurations range from 8-bit to 32-bit port expansion with voltage levels supporting 1.8V to 5.5V operation. Advanced features include programmable pull-up/pull-down resistors, interrupt masking, polarity inversion, and hot-insertion protection for mission-critical applications requiring high reliability and long-term availability.

Why Choose Our I/O Expander Solutions

We supply high-reliability I/O expanders from leading semiconductor manufacturers with full traceability, extended temperature ratings (-40°C to +125°C), and automotive-grade qualifications (AEC-Q100). Our technical support team provides design assistance, reference schematics, and application guidance to accelerate your development cycle.

Explore More Resources:

Browse our complete semiconductor catalog for aerospace, automotive, industrial, medical, and telecommunications applications.

Read our technical blog for the latest industry trends, product announcements, and application notes.

Contact our engineering team for design support, custom solutions, and technical specifications.