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Microcontroller, MPU and FPGA sourcing

8-bit and Arm Cortex-M microcontrollers, crossover MCUs, application processors and FPGAs, by complete ordering code or by specification. We decode flash size, package, temperature grade and speed grade on every line, and check the boot and programming details that decide whether a substitute will run your firmware.

What we source

Six groups cover the processing parts on most BOMs. They are bought for the firmware that runs on them, so the question is rarely only “is it in stock” but also “will our code run on it”.

8-bit microcontrollers

AVR, PIC and 8051-class MCUs in DIP, SOIC, TQFP and QFN. Long production lives and many legacy designs. Typical lines: ATmega328P, ATtiny85, PIC16F877A, PIC18F45K22.

Arm Cortex-M0+ to M4

General-purpose 32-bit MCUs from 16 KB to 2 MB flash. The largest group on most BOMs. Typical lines: STM32F103, STM32G030, STM32F411, SAMD21, LPC55S69.

Crossover and high-performance MCUs

Cortex-M7 and dual-core parts that run from external flash or large internal SRAM. Typical lines: i.MX RT1062, STM32H743, RP2040.

Application processors (MPUs)

Cortex-A processors for Linux designs, used with DDR, eMMC and a matched PMIC. Typical lines: AM3358, i.MX 6ULL, STM32MP157.

FPGAs and CPLDs

Small and mid-range FPGAs and CPLDs, with their configuration flash. Typical lines: Artix-7 XC7A35T, Spartan-7, iCE40UP5K, MAX 10, ECP5.

Alternative-brand MCUs

Pin-compatible MCUs from GigaDevice, WCH and other makers, quoted as candidates with the firmware differences listed, never as silent substitutes.

What an MCU quote depends on

Send what you have. A complete ordering code is fastest; a requirement works too, and we come back with candidate codes.

Complete ordering code, including flash size, package, temperature grade and packing letters
Quantity and target date, so we can compare distribution, independent stock and factory lead time
Silicon revision, if your firmware or errata workarounds depend on it
Date code window, if your quality system limits the age of stock
Alternative rule: original only, discuss first, or your approved list
For a requirement: core, flash and RAM, peripherals, package, voltage and temperature range

The quote line states the source channel, packaging, date code, lead time and validity. Parts are supplied blank, as packed by the manufacturer. Nothing is substituted without your written approval.

Representative parts and their key numbers

These are lines we see often. The numbers are the ones a replacement must match, taken from the manufacturers’ current datasheets.

部品

コア

Max clock

Flash / RAM

Key number

パッケージ

ATmega328P-AU

AVR 8-bit

20 MHz

32 KB / 2 KB

Signature 0x1E950F; 1 KB EEPROM

TQFP-32

PIC16F877A-I/P

PIC 8-bit

20 MHz

14 KB / 368 B

256 B EEPROM; −40 to 85 °C

PDIP-40

STM32G030F6P6

Cortex-M0+

64 MHz

32 KB / 8 KB

2.0–3.6 V supply

TSSOP-20

STM32F103C8T6

Cortex-M3

72 MHz

64 KB / 20 KB

“8” = 64 KB flash, “6” = −40 to 85 °C

LQFP-48

GD32F103C8T6

Cortex-M3

108 MHz

64 KB / 20 KB

Pin-compatible with STM32F103C8T6; different flash timing

LQFP-48

RP2040

Dual Cortex-M0+

133 MHz

none / 264 KB

No internal flash; boots from external QSPI flash

QFN-56

MIMXRT1062DVL6A

Cortex-M7

600 MHz

none / 1 MB

Consumer grade; industrial CVL5A runs at 528 MHz

MAPBGA-196

XC7A35T-1CPG236C

FPGA

speed grade -1

33,280 logic cells

Commercial, 0 to 85 °C T_J; needs external config flash

CPG236 BGA

ICE40UP5K-SG48I

FPGA

—

5,280 LUTs, 1 Mb SPRAM

Industrial grade; one-time NVCM or external SPI flash

QFN-48

Example parts, not a stock list. Confirm the current datasheet and the exact suffix before design or purchase. Need one of these? Send the part number and we confirm the orderable code and stock.

How to specify each group

Two parts with the same pin count can need very different firmware, boot hardware or programming tools. These are the checks our engineers run before a candidate goes on a quote.

Each tab lists what defines the part, the numbers to compare, the trap we see most often, and what to send so we can quote without guessing.

8-bit MCUs

Cortex-M MCUs

Crossover MCUs

Application processors

FPGAs and CPLDs

Alternative brands

8-bit MCUs

Cortex-M MCUs

Crossover MCUs

Application processors

FPGAs and CPLDs

Alternative brands

Six problems buyers find after the order

Each of these looks fine on a quote and fails at the programming station or in the field. We check for them before a line is quoted.

What happened

Why

確認すべきこと

Programmer reports “wrong device signature”

ATmega328 delivered for ATmega328P, or a different silicon ID

Exact MPN; device ID on a sample before the batch ships

Firmware does not fit or crashes at start-up

Smaller flash or RAM letter (C8 instead of CB)

Flash and RAM size code against the firmware map

Board does not boot

Crossover MCU or FPGA paired with a flash its boot ROM does not support

Boot ROM flash list, flash MPN on the BOM

FPGA design fails timing or behaves erratically

Slower speed grade, or an engineering-sample part

Speed grade digit; “ES” in the marking

Industrial unit fails at low or high temperature

Consumer or commercial grade quoted for an industrial line

Temperature letter or digit in the ordering code

Firmware runs, but timing or ADC readings change

Pin-compatible alternative brand fitted without re-test

Clock, flash wait states, ADC and USB errata

Worked example: decoding one STM32 code

STM32F103C8T6 reads, segment by segment: STM32 family, F general purpose, 103 performance line, C 48 pins, 8 64 KB flash, T LQFP package, 6 −40 to 85 °C.

Three neighbours look the same in a search and are not interchangeable. STM32F103CBT6 has 128 KB of flash. STM32F103C8T7 is rated to 105 °C. STM32F103R8T6 is a 64-pin part with a different footprint. A firmware image linked for 128 KB, or a board that runs at 95 °C, decides which one you need.

When a buyer asks for “STM32F103 in LQFP-48”, we ask for the firmware size and the operating temperature before we quote. Send them with the part number and the quote comes back with the right code.

Worked example: the flash an MCU boots from

RP2040 has no internal flash. It boots from an external QSPI flash; the Raspberry Pi Pico uses a 2 MB Winbond W25Q16JV. The same applies to i.MX RT1062 and to most FPGAs, which load their configuration from SPI flash at power-up.

So the processor line on the BOM depends on a memory line. If the flash goes short and is replaced, the new part has to be on the boot ROM’s supported list, or the board does not start. Upload the BOM and we quote both lines together.

Three requests we see, and how we handle them

Each started as a short message with a part number. What we check, and in which order, decides whether the buyer gets a usable part or a second problem.

"We need 3,000 STM32F103C8T6 and the lead time is a year"

We quote distribution stock and qualified independent stock with their date codes, and the factory lead time next to them. In parallel we list GD32F103C8T6 as a candidate, marked as needing a firmware rebuild and re-test, so engineering can start qualifying it while the first order ships.

"Half-price XC7A35T on the open market"

A low price on an FPGA is a reason to look closer. We check the full marking for speed grade, temperature grade and any "ES" suffix, compare the date code with the lot, and recommend X-ray and an electrical test by an independent lab before the batch is released.

"The industrial i.MX RT1062 is out, can we use the consumer one?"

Electrically the consumer part fits the footprint, but it is rated for 0 to 95 °C, not −40 to 105 °C. If the product's range is industrial, we tell you so on the quote and look for the CVL5A in independent stock instead of offering the cheaper part as a fit.

Where these parts go

The same Cortex-M part is specified differently in a 24 V control cabinet and in a battery-powered sensor. These are the requirements that change by application.

Industrial automation

Cortex-M3 and M4 MCUs with CAN and Ethernet, −40 to 85 °C or 105 °C grades, long production lives and fixed silicon revisions.

モーター制御＆ロボティクス

MCUs with advanced timers and fast ADCs, such as STM32G4 and F3 lines; FPGAs for multi-axis control and encoder interfaces.

Power & energy

MCUs and DSCs for digital power control and metering, with high-resolution PWM and industrial temperature grades.

Edge AI & AIoT

Crossover MCUs and MPUs with their DDR, flash and PMIC, quoted as one set so the boot chain stays consistent.

コンシューマーエレクトロニクス

Low-cost Cortex-M0+ MCUs in TSSOP and QFN, in full reels for production; alternative-brand candidates where cost matters.

スマートオーディオ＆ボイス

MCUs with I²S and DSP extensions, and crossover MCUs for audio processing and wake-word detection.

Why buyers send MCU lines to us

Ordering code decoded

Flash, pin count, package, temperature, speed grade and packing letters are checked against the datasheet on every line.

Candidates with firmware impact

Pin-compatible options listed with clock, memory, peripheral and toolchain differences. Your engineers approve.

Distribution and independent stock compared

Factory lead time, distributor stock and qualified independent stock in China quoted next to each other, channel named.

Lifecycle flagged

NRND and EOL status shown per line, with last-time-buy quantities and date codes when a part is going away.

Original packing kept

Trays, reels and tubes as packed by the manufacturer, moisture-barrier bags intact. Cut tape for samples where the source allows.

Answer within 24 hours

A quote, or the specific questions that stop us quoting, within 24 hours of a complete enquiry.

Quality checks for MCUs and FPGAs

Popular MCUs and FPGAs are among the most remarked parts in the open market. A copy can carry a convincing marking and still have a different die inside, or none.

Markings, logo, date code and lot code checked against the manufacturer's marking scheme
Extra attention to widely copied lines: STM32F103, ATmega328P, Artix-7 and Spartan FPGAs
Device ID read on a sample with a programmer when the order calls for it
Engineering-sample markings and refurbished-ball BGAs rejected
Moisture-sensitive packages shipped in sealed bags with desiccant and humidity card (J-STD-033)
X-ray, decapsulation or electrical testing by an independent laboratory when the risk calls for it, quoted before you order