Types of Chips: 10 Core IC Categories and How to Choose

Types of Chips: 10 Core IC Categories Explained (and What Each Means for Your PCB)

Short answer: Most chips on a circuit board fall into ten practical categories: CPU, GPU, MCU, FPGA, ASIC, memory (DRAM and Flash), ADC/DAC, PMIC, RFIC, and MEMS or optoelectronic devices. Each one does a different job, is chosen by different parameters, and puts different demands on PCB layout. This guide gives a quick reference for all ten and links to deeper articles where we cover a category in detail.

The 10 chip categories at a glance

Category	Core role	Choose by	Main PCB concern
CPU	Runs programs, processes data, schedules tasks	Compute performance, architecture, power, memory support	Dense packages, power delivery, thermal design
GPU	Parallel computing: graphics, image processing, AI workloads	Compute, memory capacity, bandwidth, power	Dense packages, power delivery, thermal design
MCU	Reads sensors, runs control programs, drives peripherals	Clock speed, memory size, peripheral interfaces, power	Decoupling, crystal placement, analog and digital separation
FPGA	Reconfigurable digital logic and high-speed data processing	Logic resources, DSP resources, interface speed, development cost	Multiple supply rails, high-speed routing, BGA fanout
ASIC	Custom hardware for one specific task	Performance needs, development cost, expected volume	Follow the vendor's reference design
DRAM / Flash	DRAM holds data while running; Flash keeps data without power	Capacity, read/write speed, interface, endurance	Matched routing and tight decoupling for DRAM
ADC / DAC	Convert analog signals to digital and back	Resolution, sampling rate, accuracy, noise	Clean reference, analog isolation from digital noise
PMIC	Voltage conversion, power distribution, power sequencing	Input and output voltage, current, efficiency, ripple	Small switching loops, thermal pad, passive selection
RFIC	Transmits, receives, amplifies or converts RF signals	Frequency band, gain, noise figure, output power	Controlled impedance, RF and digital separation
MEMS / optoelectronic	Senses or acts on physical change; converts, detects or emits light	Range, sensitivity, response speed, operating environment	Placement, stress, manufacturer land pattern

 

These categories overlap in practice. An SoC integrates a CPU, memory and other blocks on one die, many MCUs include ADCs, and some FPGAs include processor cores. Use the table to decide which function you need, then check the datasheet for how a specific part combines them.

Processing chips: CPU, GPU and MCU

CPU

The CPU is the general-purpose processor. It executes programs, processes data and handles task scheduling, and it is strongest at varied, sequential workloads with a mature software ecosystem. Select by compute performance, architecture, power and the memory it supports. High-performance CPUs usually come in dense BGA or LGA packages, which drives layer count, power delivery and thermal design; see our comparison of LGA vs BGA packages.

GPU

A GPU performs large numbers of similar calculations in parallel, which suits graphics rendering, image processing and AI computation. Compare compute, memory capacity, bandwidth and power. Its PCB demands are similar to a high-end CPU, with the memory interface and power delivery adding to the design effort. For the AI hardware landscape, see GPU vs TPU vs ASIC vs FPGA.

MCU

An MCU puts a processor core, memory, timers and peripherals such as ADCs on one chip. It collects sensor data, runs control programs and drives outputs, and it is the default choice for appliances, automotive electronics and industrial control. Select by clock speed, memory size, peripheral interfaces and power consumption. On the board, place decoupling close to every power pin and keep analog inputs away from fast digital lines; our ESP32 vs STM32 comparison shows how these layout rules differ between designs. For a broader comparison of processor families, see CPU, MCU, MPU, SoC, DSP, ECU, GPU and FPGA differences.

Programmable and custom logic: FPGA and ASIC

FPGA

An FPGA implements custom digital logic by configuring its hardware, so the logic can be reworked after the board is built. Its strengths are parallel processing and reconfigurability, which suits high-speed acquisition, communications and prototype validation. Compare logic resources, DSP resources, interface speed and development cost. FPGAs typically need several supply rails, so check the datasheet for power-up sequencing requirements, and plan BGA fanout early. For the trade-offs against microcontrollers, see FPGA vs MCU.

ASIC

An ASIC is designed for one task, so its computing or control function can be optimized for performance, power and die area. It makes sense when requirements are fixed, performance matters, and expected volume justifies the development cost; typical uses include AI acceleration and networking. When you use an ASIC-based part, follow the vendor's reference design and layout guidelines. Our guide to the AI ASIC covers what this means for PCB design.

Memory: DRAM and Flash

DRAM holds data while the system runs and is fast, but it loses its contents when power is removed. Flash retains data without power, which makes it the choice for firmware and storage. Most computers, phones, SSDs and embedded systems use both. Select by capacity, read and write speed, interface and endurance. DDR memory needs matched routing and tight decoupling following the controller vendor's guidance, while an external flash chip mainly needs a short, clean connection to its controller. Our guide to decoupling capacitor placement covers the power side of memory design.

Signal and power chips: ADC/DAC, PMIC and RFIC

ADC and DAC

An ADC converts an analog signal into digital data, and a DAC converts digital data back into an analog signal. They link real-world signals to digital systems in sensor acquisition, audio equipment and industrial instruments. Compare resolution, sampling rate, accuracy and noise. Accuracy depends heavily on layout: keep the analog section separated from switching digital signals, and give the reference a clean, stable supply. The STM32U575 pinout guide shows how a microcontroller with built-in ADC and DAC separates analog supply and reference pins.

PMIC

A power management IC handles voltage conversion, power distribution and power sequencing. Because it integrates several functions, it can simplify power design and save board space in phones, smart hardware and embedded boards. Check input and output voltage, current, conversion efficiency and ripple. Follow the datasheet for the recommended inductors and capacitors, keep switching loops small, and provide the thermal pad connection the package requires; our SMD packages guide explains why QFN thermal pads need thermal vias.

RFIC

An RF IC processes wireless signals by transmitting, receiving, amplifying or converting them, and integrates key RF functions to reduce the size of a wireless system. It is used in Wi-Fi, Bluetooth and cellular communication. Compare operating frequency band, gain, noise figure and output power. RF traces generally need controlled impedance, commonly 50 ohms, and the RF section should be separated from digital switching noise. See what an RF PCB is for the layout principles, and our ESP32 antenna design guide for a practical module example.

Sensing: MEMS and optoelectronic chips

MEMS devices sense or act on physical changes, such as acceleration or pressure, while optoelectronic chips convert, detect or emit light. Their small size and easy integration make them common in accelerometers, pressure sensors, cameras and optical communication. Select by measurement range, sensitivity, response speed and operating environment. On the board, follow the manufacturer's land pattern and handling notes, and consider placement relative to mechanical stress and heat sources, since both can affect sensor readings.

How these chips work together

A real product combines several categories. A battery-powered wireless sensor, for example, might use a MEMS sensor, an ADC for analog inputs, an MCU to run the firmware, Flash for program storage, an RFIC for wireless communication, and a PMIC to power everything from a battery. Each connection between categories is a layout decision: where analog meets digital, where RF meets switching power, and where high-speed memory meets its controller.

Block diagram of a battery-powered wireless sensor node showing MEMS sensor, ADC, MCU, Flash, RFIC, antenna, PMIC and battery

For a broader introduction to the other parts on a board, see our guides to electronic components and key PCB parameters and circuit board components.

If your design mixes several of these chip types, the NextPCB engineering team can review your layout and BOM before production. Our BOM service checks submitted part numbers against live marketplace stock and flags lead-time risk and possible alternates at the quoting stage.

FAQ

What are the main types of chips?

Common practical categories are CPU, GPU, MCU, FPGA, ASIC, memory (DRAM and Flash), ADC and DAC converters, power management ICs, RF ICs, and MEMS or optoelectronic devices. They are grouped by function, and real parts often combine more than one.

What is the difference between an MCU and a CPU?

An MCU integrates a processor core, memory, timers and input and output peripherals on one chip and is designed for control tasks. A CPU focuses on general-purpose computing and normally relies on external memory and peripherals.

When should I choose an FPGA instead of an ASIC?

Choose an FPGA when you need reconfigurable logic, are validating a design, or expect lower volume. Choose an ASIC when requirements are fixed, performance and power must be optimized, and expected volume justifies the development cost.

Why does a system need both DRAM and Flash?

DRAM holds data while the system is running and is fast, but it loses its contents without power. Flash keeps data when power is off, so it stores firmware and files. Most systems use both.

What is the difference between an ADC and a DAC?

An ADC converts an analog signal into digital data, for example when reading a sensor. A DAC converts digital data into an analog signal, for example when producing audio or a control voltage.

Which chips need the most careful PCB layout?

It depends on the type. High-speed digital chips such as CPUs, GPUs, FPGAs and DDR memory need careful power delivery and routing. Precision ADCs, DACs and RF ICs need noise isolation and, for RF, controlled impedance. PMICs need compact switching loops and thermal design.