How do I start selecting a PIC MCU?

List the peripherals you need, such as timers, ADC channels and interfaces, then choose the core and the memory that cover the code, and confirm the package and the temperature range. Those decisions narrow the selection quickly.

Choose an 8-bit PIC for a simple control, an instrumentation or a low-cost task, where the small instruction set and the low pin count are an advantage. Choose the 32-bit PIC32 when the workload needs more memory, a higher throughput or a larger address space. Our FAE team can help match the core.

The PIC18F4550 provides USB 2.0 full-speed in an 8-bit part, and the PIC32MX provides USB on a 32-bit core, so the USB capability is available across the family. The on-chip PLL generates the 48 MHz USB clock. Our FAE team can help with the USB bring-up.

Are the devices genuine and documented?

Every Microchip device BeiLuo ships is factory-traceable and includes an import declaration, a certificate of origin and a RoHS compliance file. Mainstream models are held in regional warehouses. Click a model for stock status, or request a quote for current lead time.

How do I start selecting an AVR MCU?

Estimate the flash, the EEPROM and the SRAM you need, count the peripherals and the I/O, then choose the part and the package that cover the design with headroom. Those decisions narrow the selection quickly.

Which AVR part should I choose?

Choose the ATtiny85 for a small, low-cost task in an 8-pin package, the ATmega328P for a general application with a good balance of memory and I/O, and the ATmega2560 for a large design that needs 256 KB of flash and many I/O lines. Our FAE team can help match the part.

Why is the AVR core efficient?

The AVR core executes most instructions in a single clock cycle and has 32 general-purpose registers, so it reaches about one MIPS per MHz and keeps the code compact. This efficiency is why it has been popular for so long in embedded designs. Read the PIC vs AVR notes for the comparison.

How do I start selecting a serial EEPROM?

Add up the configuration, the calibration, the logs and the buffers you must keep, choose the I2C or the SPI bus from the host, then confirm the voltage and the package. Those decisions narrow the selection quickly.

Which density should I choose?

Add up the data you must keep and round up to a standard density with headroom. The 24LC256 and 25LC256 give 256 Kbit for the configuration, the calibration and a large log, and the 24AA02E48 gives a small 2 Kbit for the settings and the identity. Our FAE team can help size the density.

Choose the I2C 24-series for the fewest pins and a shared bus, and the SPI 25-series for the fastest access and a dedicated bus. Both share a common pinout within the family, so the choice follows the host and the throughput. Our FAE team can help choose the bus.

PIC or AVR: which should I choose?

Both families are strong for embedded control. Choose the PIC for its low pin count and its broad family with integrated USB and communication, and the AVR for its efficient single-cycle core and its large code library. The choice often follows the team's experience and the toolchain. Our FAE team can help match the family.

Are the toolchains the same?

Yes. Both families use the MPLAB environment and the XC compilers, so the same toolchain serves a PIC and an AVR design, which simplifies a mixed project and a team that works across the families. Our FAE team can help with the bring-up.

Can I migrate between the families?

A design can migrate between the PIC and AVR families with care, because the peripherals and the register maps differ. Keep the hardware abstraction layer, re-check the timing and test each peripheral on its own before the whole system. Our FAE team can help with a migration.

What is the standout feature of the Microchip range?

The standout feature is the breadth: two 8-bit families in the PIC and the AVR, a 32-bit PIC32, and a wide serial EEPROM range, all with one toolchain, so a designer can source the processor and the memory from one supplier with a consistent support path. The main design care points are the boot and the data retention.

How do the MCUs perform in practice?

In practice the PIC and AVR 8-bit parts give a good performance for the cost, and the 32-bit PIC32 adds memory and throughput where needed. On the bench the cores ran at their rated clock and the peripherals behaved as the datasheet describes. Confirm the peripheral differences for your design.

How does the serial EEPROM perform?

The Microchip serial EEPROM gives a reliable write and read across the temperature range with about one million write cycles and a 40-year retention, and the page write and the write-protect keep the data safe. The 24AA02E48 adds a factory EUI-48 identity. Our FAE team can review the write scheme.

Can I get samples to evaluate?

Yes. We provide samples of the Microchip MCUs and serial EEPROM for your own performance, power and retention testing, with documentation included and FAE support during bring-up. Request a sample and we will confirm stock and lead time.

Technical Support | Microchip Expertise | BeiLuo

Guides, application notes and reviews from BeiLuo's FAE team covering Microchip PIC and AVR microcontrollers and serial EEPROM in detail for your design.

Guides 3 Application Notes 1 Troubleshooting 0 Reviews 1

How to Select a Microchip PIC MCU

2026-07-26 - Guides - By Liu Wei

Compare Microchip PIC microcontrollers by core, memory, speed and package for 8-bit and 32-bit embedded control and instrumentation designs and products.

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How to Select a Microchip AVR MCU

2026-07-21 - Guides - By Chen Hao

A practical method for selecting Microchip AVR microcontrollers by flash, EEPROM, SRAM and package from the ATtiny to the ATmega for any embedded design.

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How to Select a Microchip Serial EEPROM

2026-07-16 - Guides - By Zhang Min

Choose between Microchip I2C and SPI serial EEPROM by density, bus, voltage and package for configuration, data and identity storage designs and products.

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Microchip PIC vs AVR MCU Design Notes Guide

2026-07-09 - Application Notes - By Chen Hao

Microchip PIC and AVR design notes: core, memory, toolchain, USB and the practical differences between the two families for a migration or a new design.

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Microchip MCU and EEPROM Review Report

2026-06-30 - Reviews - By Liu Wei

A hands-on review of Microchip PIC and AVR microcontrollers and serial EEPROM for embedded designs, covering cost, power and boot and data retention today.

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Meet Our FAE Team

Liu Wei

Senior FAE Engineer, PIC MCUs

PIC MCUsPIC32Embedded Control

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Chen Hao

FAE Engineer, AVR MCUs

AVR MCUsATmegaMigration

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Zhang Min

FAE Engineer, Memory

Serial EEPROMI2CSPI

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