Modern vehicles use semiconductors for control, power conversion, sensing, communication and human-machine interfaces. There is no single “car chip.” A vehicle contains different device classes with different electrical, environmental and safety requirements. Procurement should therefore start from an approved full ordering code, not a generic chip category.
Microcontrollers and processors coordinate vehicle functions
Microcontrollers execute control software in body systems, powertrain, battery management, chassis and other electronic control units. Larger processors or system-on-chip devices can support infotainment, connectivity and driver-assistance workloads.
Selection factors include compute performance, memory, peripherals, startup behavior, power modes, security features, package, temperature grade and software ecosystem. Confirm the exact memory and interface configuration because closely related devices may not be software or pin compatible.
Power semiconductors convert and distribute energy
MOSFETs, IGBTs, diodes, gate drivers and power-management ICs switch and regulate energy in low-voltage loads, chargers, DC-DC converters and traction systems. Silicon, silicon carbide and gallium nitride devices have different drive, switching, thermal and fault behavior.
Evaluate voltage and current margin, switching loss, conduction loss, short-circuit response, isolation and cooling as a system. A wide-bandgap material can improve a suitable design, but it does not establish efficiency or reliability without the correct driver, layout, protection and thermal path.
Sensors connect the vehicle to physical conditions
Vehicles measure pressure, temperature, position, speed, acceleration, current, magnetic fields, light and other quantities. The sensor element, signal conditioning, mounting and calibration all affect the result.
For measurement planning, see our sensor sourcing page. Confirm range, accuracy, drift, bandwidth, diagnostic coverage, interface and environmental exposure for the actual mounting location.
Connectivity devices move data inside and outside the vehicle
CAN, LIN, Ethernet and other transceivers connect electronic units. Wireless devices may support keyless access, tire-pressure monitoring, cellular, Wi-Fi, Bluetooth or positioning. Check physical-layer standard revision, network topology, electromagnetic compatibility, sleep current, wake behavior and protection.
Cybersecurity and update requirements extend beyond the transceiver. System architecture must control identities, keys, software updates and diagnostic access.
Automotive qualification has a defined scope
Infineon's AEC-Q100 overview describes qualification test sequences for integrated circuits. Other AEC documents apply to categories such as discrete semiconductors and passive components.
Qualification of a component does not qualify the complete electronic control unit or vehicle function. Confirm the grade, temperature range, package and qualification report for the exact part. Requirements for functional safety, electromagnetic compatibility and environmental validation remain system responsibilities.
Functional safety requires architecture and evidence
Safety mechanisms can include diagnostics, watchdogs, redundant measurements, error-correcting memory and defined safe states. A component may provide features or documentation to support a safety process, but the system team must allocate requirements, analyze faults and validate the integrated function.
Do not infer a safety integrity level from the presence of one “safety-ready” component. Review the safety manual, assumptions of use and diagnostic coverage in the intended architecture.
Thermal and lifecycle planning affect supply
Calculate junction temperature from real losses and the package-to-ambient path. Include hot-soak, cold start, transient load, enclosure and nearby heat sources. Verify performance and protection across supply and temperature limits.
Automotive programs can require long production and service periods. Record lifecycle status, change-notification expectations, traceability, approved manufacturing sites and alternate strategy. A pin-compatible substitute can still require software, EMC, thermal and qualification review.
Procurement checklist
- Use the complete manufacturer ordering code.
- Confirm package, grade and qualification evidence.
- Check lifecycle and product-change notification terms.
- Define traceability and date-code requirements.
- Review alternates through engineering change control.
- Inspect packaging, labels and documentation at receipt.
- Validate production-intent hardware and software.
For sourcing support, send the full bill of materials, quantities, qualification requirements and approved alternates through our contact page.
