Please refer to the English Version as our Official Version.

Europe: France~~(Français)~~ Germany~~(Deutsch)~~ Italy~~(Italia)~~ Russian~~(русский)~~ Poland~~(polski)~~ Czech~~(Čeština)~~ Luxembourg~~(Lëtzebuergesch)~~ Netherlands~~(Nederland)~~ Iceland~~(íslenska)~~ Hungarian~~(Magyarország)~~ Spain~~(español)~~ Portugal~~(Português)~~ Turkey~~(Türk dili)~~ Bulgaria~~(Български език)~~ Ukraine~~(Україна)~~ Greece~~(Ελλάδα)~~ Israel~~(עִבְרִית)~~ Sweden~~(Svenska)~~ Finland~~(Svenska)~~ Finland~~(Suomi)~~ Romania~~(românesc)~~ Moldova~~(românesc)~~ Slovakia~~(Slovenská)~~ Denmark~~(Dansk)~~ Slovenia~~(Slovenija)~~ Slovenia~~(Hrvatska)~~ Croatia~~(Hrvatska)~~ Serbia~~(Hrvatska)~~ Montenegro~~(Hrvatska)~~ Bosnia and Herzegovina~~(Hrvatska)~~ Lithuania~~(lietuvių)~~ Spain~~(Português)~~ Switzerland~~(Deutsch)~~ United Kingdom~~(English)~~

Asia/Pacific: Japan~~(日本語)~~ Korea~~(한국의)~~ Thailand~~(ภาษาไทย)~~ Malaysia~~(Melayu)~~ Singapore~~(Melayu)~~ Vietnam~~(Tiếng Việt)~~ Philippines~~(Pilipino)~~

Africa, India and Middle East: United Arab Emirates~~(العربية)~~ Iran~~(فارسی)~~ Tajikistan~~(فارسی)~~ India~~(हिंदी)~~ Madagascar~~(malaɡasʲ)~~

South America / Oceania: New Zealand~~(Maori)~~ Brazil~~(Português)~~ Angola~~(Português)~~ Mozambique~~(Português)~~

North America: United States~~(English)~~ Canada~~(English)~~ Haiti~~(Ayiti)~~ Mexico~~(español)~~

Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~ATMEGA324P-B15AZ~~

Image may be representation.
See specifications for product details.

~~Favorite~~

EXPRESS OPTION

Payment method

ATMEGA324P-B15AZ - Microchip Technology

Name: Microchip Technology ATMEGA324P-B15AZ
Brand: Microchip Technology
SKU: ATMEGA324P-B15AZ
Availability: InStock
Rating: 5 (6 reviews)

Manufacturer Part Number: ATMEGA324P-B15AZ

Manufacturer: Microchip Technology

Allelco Part Number: 32D-ATMEGA324P-B15AZ

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 4,550 pcs available, New & Original

Parts Description: IC MCU 8BIT 32KB FLASH 44TQFP

Package: 44-TQFP (10x10)

Data sheet: ATMEGA324P-B15A.pdf

Datasheets
Cylindrical Battery Holders.pdf

PCN Design/Specification
ATMEGA Datasheet 12/Dec/2018.pdf ATmega324P/V 05/Apr/2018.pdf

PCN Packaging
MBB/Label Chgs 16/Nov/2018.pdf Tape and Reel Label Update 10/Feb/2015.pdf

PCN Assembly/Origin
2.73KHz.pdf

RoHs Status: ROHS3 Compliant

~~Compare~~

Our certification

In stock: 4550

Specifications

ATMEGA324P-B15AZ Tech Specifications
Microchip Technology - ATMEGA324P-B15AZ technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - ATMEGA324P-B15AZ

Product Attribute	Attribute Value
Manufacturer	Microchip Technology
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Supplier Device Package	44-TQFP (10x10)
Speed	16MHz
Series	Automotive, AEC-Q100, AVR® ATmega
RAM Size	2K x 8
Program Memory Type	FLASH
Program Memory Size	32KB (16K x 16)
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Package / Case	44-TQFP
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 125°C (TA)
Number of I/O	32
Mounting Type	Surface Mount
EEPROM Size	1K x 8
Data Converters	A/D 8x10b
Core Size	8-Bit
Core Processor	AVR
Connectivity	I²C, SPI, UART/USART
Base Product Number	ATMEGA324

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.31.0001

Parts Introduction

ATMEGA324P-B15AZ (1)

Manufacturer Part Number

ATMEGA324P-B15AZ

Manufacturer

Microchip Technology

Introduction

The ATMEGA324P-B15AZ is a high-performance 8-bit AVR microcontroller from Microchip Technology designed for automotive and industrial applications.

Product Features and Performance

Core: 8-Bit AVR

Speed: 16MHz

Connectivity: I2C, SPI, UART/USART

Peripherals: Brown-out Detect/Reset, Power-on Reset, PWM, Watchdog Timer

Number of I/O: 32

Program Memory Size: 32KB (16K x 16)

EEPROM Size: 1K x 8

RAM Size: 2K x 8

Voltage Supply (Vcc/Vdd): 2.7V to 5.5V

Data Converters: 8 x 10-bit ADC

Oscillator: Internal

Operating Temperature Range: -40°C to 125°C

Chip Package: 44-TQFP (10x10)

Product Advantages

Robust high-speed 8-bit processing

Wide range of connectivity options

Enhanced peripheral set supporting complex applications

Supports a wide range of power supply voltages

Key Technical Parameters

Core Size: 8-Bit

Speed: 16MHz

Program Memory: 32KB FLASH

EEPROM: 1KB

RAM: 2KB

I/O Pins: 32

ADC: 8 channels, 10-bit resolution

Quality and Safety Features

Automotive grade reliability

AEC-Q100 qualified

Brown-out detect and Power-on Reset for safety and reliability

Operating range from -40°C to 125°C ensures performance under extreme conditions

Compatibility

Compatible with AVR development and debugging tools

Software support across Microchip’s development environments

Application Areas

Automotive systems

Industrial automation and control

System monitoring

Smart sensor systems

Product Lifecycle

Current Product Status: Active

Not nearing discontinuation

Continuous support and updates available from Microchip

Several Key Reasons to Choose This Product

Robust temperature range and quality qualifications make it ideal for automotive applications

Broad connectivity and peripheral options offer design flexibility

High reliability and safety features ensure system stability

Extensive support and compatibility with AVR toolchain and Microchip software

Active product lifecycle with ongoing manufacturer support and updates

Frequently Asked Questions(FAQ)

How does the ATMEGA324P-B15AZ compare to other AVR ATmega microcontrollers in terms of program memory and I/O availability for automotive-grade embedded systems?: The ATMEGA324P-B15AZ offers 32KB of FLASH program memory and 32 general-purpose I/O pins, providing a balanced resource allocation suitable for moderately complex automotive applications. When compared to similar devices in the ATmega family, such as the ATMEGA1284P, it trades higher memory capacity (128KB) for lower pin count (32 vs. 32), while maintaining comparable voltage operation and peripheral support. This makes it more appropriate for space-constrained designs where moderate code size and I/O are sufficient, rather than high-performance or large-scale automotive control units.

What are the key considerations when selecting the ATMEGA324P-B15AZ for an automotive application requiring AEC-Q100 compliance?: The ATMEGA324P-B15AZ is qualified under AEC-Q100, ensuring reliability in harsh automotive environments. Designers must verify that the full system—including power supply stability, thermal management, and signal integrity—meets automotive standards. While the microcontroller itself operates from -40°C to 125°C, external components and PCB layout must also be engineered to sustain this temperature range. Additionally, the MSL 3 rating indicates standard moisture sensitivity, so assembly must follow controlled soldering profiles to prevent damage during reflow.

Can the ATMEGA324P-B15AZ reliably drive multiple high-current loads given its 32 I/O lines and 2.7V–5.5V supply range?: With 32 I/O pins capable of sourcing or sinking up to 40mA per pin (with a total chip limit of 200mA), the ATMEGA324P-B15AZ can manage several medium-current peripherals but may require external drivers for high-power loads like relays or LEDs. At lower voltages (e.g., 2.7V), output current capability decreases slightly due to reduced headroom across internal transistors. Therefore, for applications involving motor control or LED arrays, designers should offload switching functions using MOSFETs or driver ICs to avoid overloading the MCU.

How does the internal oscillator performance of the ATMEGA324P-B15AZ affect timing accuracy in precision automotive sensing applications?: The ATMEGA324P-B15AZ includes an internal calibrated RC oscillator running at 16MHz with typical ±1% accuracy over temperature and voltage. While sufficient for most real-time control tasks, this variation may introduce timing errors in applications like pulse measurement or PWM generation requiring tight synchronization. For higher precision, external crystals or oscillators should be used, especially in engine management or safety-critical systems where timing jitter directly impacts performance.

In what scenarios would the ATMEGA324P-B15AZ be preferred over a Cortex-M0-based MCU despite its older AVR architecture?: The ATMEGA324P-B15AZ may be favored in legacy automotive subsystems where software compatibility, toolchain familiarity, or cost constraints outweigh raw processing speed. Its mature AVR instruction set and efficient C compiler support make development faster in certain domains like body electronics or lighting control. However, for new designs demanding low-power modes below 50µA, advanced DSP instructions, or complex communication stacks, a Cortex-M0+ or M3 device would generally offer better efficiency and scalability.

What is the significance of the ATMEGA324P-B15AZ’s EEPROM size relative to its FLASH memory, and how should this impact firmware update strategies?: With only 1KB of EEPROM compared to 32KB of FLASH, the ATMEGA324P-B15AZ provides limited non-volatile storage for configuration data or calibration parameters. Firmware updates must be performed via FLASH reprogramming, which requires erase/write cycles and careful sector management. Frequent EEPROM writes should be avoided due to limited endurance (~100k cycles). Instead, critical settings can be stored in FLASH or buffered temporarily in RAM during runtime, reducing wear on the limited EEPROM resource.

How does the operating voltage range of the ATMEGA324P-B15AZ influence its integration into modern vehicle electrical architectures?: Supporting 2.7V to 5.5V, the ATMEGA324P-B15AZ aligns well with both legacy 5V automotive buses and newer low-voltage systems transitioning toward 3.3V or even 2.5V logic levels. This flexibility simplifies interface design with sensors, actuators, and other modules operating across different supply rails. However, care must be taken during brownout conditions; the built-in BOD (Brown-out Detect) ensures reset if Vcc drops below 1.8V nominal, protecting against brownouts common in cold starts or load dumps.

Are there any known limitations of the ATMEGA324P-B15AZ related to stack usage or interrupt handling that could affect real-time performance?: As an 8-bit AVR core, the ATMEGA324P-B15AZ uses 2 bytes per stack entry and has a maximum interrupt nesting depth determined by available RAM—specifically, the 2KB SRAM limits deep call stacks. Nested interrupts consuming excessive stack space can lead to corruption during ISR chaining. Designers should minimize ISR complexity, avoid recursion, and monitor stack usage through static analysis tools to ensure reliable real-time behavior in safety-related functions.

What role do the integrated peripherals—such as ADC, WDT, and USART—play in typical automotive use cases for the ATMEGA324P-B15AZ?: The 10-bit ADC enables analog sensor interfacing (e.g., temperature, position, or pressure), while the watchdog timer enhances fault recovery in unguarded environments. USART supports serial protocols like LIN or CAN gateways, and PWM channels allow precise actuator control. Together, these peripherals reduce external component count in applications such as door module control or HVAC monitoring, though additional transceivers may still be needed for protocol-specific signaling.

How does package thermal performance impact the ATMEGA324P-B15AZ in densely populated automotive PCBs?: Mounted in a 44-pin TQFP (10x10mm), the ATMEGA324P-B15AZ dissipates heat through its exposed pad to the PCB copper plane. Without adequate thermal vias or heatsinking, junction temperatures can exceed 125°C under sustained load, triggering thermal shutdown. In compact automotive enclosures with poor airflow, passive cooling via ground plane extension and minimal surrounding components is essential to maintain reliable operation within the specified -40°C to 125°C ambient range.

Why might a designer choose the ATMEGA324P-B15AZ over a pin-compatible alternative with higher clock speed, despite similar memory footprint?: Although some ATmega variants run at 20MHz or higher, the ATMEGA324P-B15AZ’s 16MHz speed balances power consumption, EMI profile, and electromagnetic compatibility (EMC) requirements critical in automotive environments. Higher frequencies increase radiated emissions and switching noise, complicating compliance with CISPR 25. For many body-control tasks, 16MHz provides ample throughput without unnecessary risk of EMI-induced failures, making it a safer choice for production-ready automotive builds.

What factors should be evaluated when integrating the ATMEGA324P-B15AZ with external memory or peripherals beyond its native I/O capabilities?: Since the ATMEGA324P-B15AZ lacks native SDRAM or NAND controller interfaces, external memory expansion requires bit-banged protocols or dedicated shift registers, increasing CPU overhead. Communication with CAN, Ethernet, or flash memory often necessitates external transceivers or bridges. Designers must assess whether added latency and code complexity justify external resources, or if onboard peripherals (SPI, I2C, UART) suffice within the 32KB memory constraint.

How does the absence of hardware floating-point support in the ATMEGA324P-B15AZ affect algorithm implementation in signal-processing applications?: Being an 8-bit core without FPU, the ATMEGA324P-B15AZ performs floating-point operations in software, consuming significant CPU cycles—often hundreds per operation. In applications requiring rapid filtering, PID loops, or mathematical modeling, this can saturate the 16MHz core. Workarounds include fixed-point arithmetic or lookup tables, but they increase development time and memory usage. Such algorithms are better suited to higher-end MCUs unless simplified models are acceptable.

What precautions are necessary when using the ATMEGA324P-B15AZ in systems subject to ISO 26262 functional safety assessments?: While the ATMEGA324P-B15AZ itself is not ASIL-rated, it can support safety goals under ASIL B/C with proper architectural mitigations—such as dual-cast checking, error-correcting codes (ECC), or periodic self-tests of critical variables. However, achieving formal certification typically requires a safety manual, fault injection testing, and validation against failure rates. Given its lack of built-in diagnostics beyond WDT and BOD, external monitoring circuits may be needed to meet stringent automotive safety standards.

How does the RoHS3 and REACH compliance of the ATMEGA324P-B15AZ influence global automotive supply chain logistics?: RoHS3 compliance ensures the absence of restricted substances like Pb, Cd, Hg, and certain phthalates, aligning with EU ELV and WEEE directives. REACH unaffected status confirms no SVHCs above 0.1% weight threshold, simplifying regulatory documentation across markets including North America, Europe, and Asia. These attributes reduce customs delays and audit risks, facilitating smoother production ramp-ups and aftermarket service provisioning for global OEMs deploying the ATMEGA324P-B15AZ in end products.

What are the implications of the ATMEGA324P-B15AZ’s Flash write endurance in mission-critical firmware storage applications?: With typical FLASH endurance of ~10k cycles, the ATMEGA324P-B15AZ is unsuitable for frequent firmware updates or logging-intensive tasks. Each sector erasure affects thousands of bytes, so wear leveling algorithms must be implemented in software to distribute writes evenly across sectors. For infrequent updates—such as factory programming or OTA upgrades once per product lifecycle—this limitation is manageable, but continuous reflash scenarios demand external NV memory or alternative storage strategies.

How does the choice between internal and external clock sources impact system stability when using the ATMEGA324P-B15AZ in vibration-prone automotive environments?: The internal oscillator of the ATMEGA324P-B15AZ is relatively immune to mechanical stress but less accurate than crystal-based clocks. External crystals offer superior frequency stability and noise immunity, beneficial in high-vibration settings where resonance could degrade oscillator performance. However, crystals add bulk, cost, and susceptibility to shock during assembly. For cost-sensitive, moderate-performance applications, the internal RC may suffice, provided timing margins account for ±1% drift across temperature.

What trade-offs exist between code density and execution speed when developing firmware for the ATMEGA324P-B15AZ using C versus assembly language?: High-level C code tends to generate larger binaries due to compiler abstractions, pushing closer to the 32KB FLASH limit and potentially requiring optimization flags (-Os, -flto). Assembly offers tighter control and faster execution but increases development time and portability challenges. In real-time automotive tasks like interrupt handlers or sensor sampling, hand-tuned assembly can yield measurable gains, but modern compilers often close the gap sufficiently for most applications, favoring C for maintainability.

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology ATMEGA324P-B15AZ

Product Attribute
Part Number	ATMEGA324P-A15AZ	ATMEGA324P-B15MZ	ATMEGA324P-A15MZ	ATMEGA324P-A15MZ
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Atmel
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Speed	-	-	-	-
EEPROM Size	-	-	-	-
Connectivity	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Core Processor	-	-	-	-
Program Memory Size	-	-	-	-
Peripherals	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Data Converters	-	-	-	-
Core Size	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Program Memory Type	-	-	-	-
Series	-	-	-	-
Oscillator Type	-	-	-	-
RAM Size	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Number of I/O	-	-	-	-

ATMEGA324P-B15AZ Datasheet PDF

Download ATMEGA324P-B15AZ pdf datasheets and Microchip Technology documentation for ATMEGA324P-B15AZ - Microchip Technology.

Datasheets: Cylindrical Battery Holders.pdf
PCN Design/Specification: ATMEGA Datasheet 12/Dec/2018.pdf ATmega324P/V 05/Apr/2018.pdf
PCN Packaging: MBB/Label Chgs 16/Nov/2018.pdf Tape and Reel Label Update 10/Feb/2015.pdf
PCN Assembly/Origin: 2.73KHz.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

QC (Quality Warranty)
Payment Support
Packaging
Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.

Strict quality inspection builds a solid foundation for electronic component quality.

Visual inspection
Performance testing and reliability verification
Standardized full-process testing
Precise control of every parameter

We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.

Quality Inspection

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner

Efficient Supply Management
Cost-Saving Procurement
Fast Sourcing & Delivery

Contact us if you have any questions.

Phone: +00852 9146 4856
Email: info@allelco.com

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

SMTA
IPC
ESD
PSMA