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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersATMEGA16L-8AQ
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ATMEGA16L-8AQ - Atmel

Manufacturer Part Number
ATMEGA16L-8AQ
Manufacturer
Atmel
Allelco Part Number
98D-ATMEGA16L-8AQ
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
9,925 pcs available, New & Original
Parts Description
IC MCU 8BIT 16KB FLASH 44TQFP
Package
44-TQFP (10x10)
Data sheet
-
RoHs Status
 
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Specifications

ATMEGA16L-8AQ Tech Specifications
Atmel - ATMEGA16L-8AQ technical specifications, attributes, parameters and parts with similar specifications to Atmel - ATMEGA16L-8AQ

Product Attribute Attribute Value
Manufacturer Atmel
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Supplier Device Package 44-TQFP (10x10)
Speed 8MHz
Series AVR® ATmega
RAM Size 1K x 8
Program Memory Type FLASH
Program Memory Size 16KB (8K x 16)
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Package / Case 44-TQFP
Package Bulk
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 105°C (TA)
Number of I/O 32
Mounting Type Surface Mount
EEPROM Size 512 x 8
Data Converters A/D 8x10b
Core Size 8-Bit
Core Processor AVR
Connectivity I²C, SPI, UART/USART
Base Product Number ATMEGA16

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
ECCN EAR99
HTSUS 8542.31.0001

Frequently Asked Questions(FAQ)

What are the key electrical characteristics and operating conditions for the ATMEGA16L-8AQ microcontroller that influence its suitability in low-power embedded designs?
The ATMEGA16L-8AQ operates across a supply voltage range of 2.7V to 5.5V, enabling compatibility with both battery-powered and standard logic-level systems. Its internal oscillator runs at 8MHz, providing sufficient clock speed for most 8-bit control applications while minimizing power consumption compared to external crystal options. With an operating temperature range spanning from -40°C to 105°C, it is suitable for industrial environments where thermal extremes may be encountered. These parameters collectively support reliable operation in energy-constrained applications such as remote sensors or portable devices.
How does the ATMEGA16L-8AQ compare to other AVR microcontrollers in terms of memory architecture and peripheral integration when targeting cost-sensitive embedded projects?
Compared to entry-level AVRs like the ATtiny series, the ATMEGA16L-8AQ offers significantly larger program memory (16KB Flash vs. typically 1–8KB) and more robust peripherals including UART, SPI, I2C, and 8-channel 10-bit ADCs. While higher-end models like the ATmega328P provide double the Flash and RAM, the ATMEGA16L-8AQ strikes a balance between functionality and component count, making it advantageous in mid-complexity designs requiring moderate processing alongside analog sensing without resorting to more expensive alternatives.
What considerations should be made regarding package type and pinout when integrating the ATMEGA16L-8AQ into a high-density PCB layout?
The ATMEGA16L-8AQ is housed in a 44-pin TQFP (10x10) package with a 0.8mm pitch, which supports compact board real estate but demands precise soldering and routing practices. Given its surface-mount configuration, designers must ensure adequate thermal relief and avoid signal crosstalk between adjacent pins—especially for high-speed interfaces like SPI or I2C. The uniform pin distribution allows flexible mapping of critical signals, though decoupling capacitors should be placed close to VCC/GND pins to maintain stable operation under dynamic loads.
How does the internal oscillator accuracy and stability impact timing-critical applications using the ATMEGA16L-8AQ?
The ATMEGA16L-8AQ relies on an internal RC oscillator calibrated to ±10% at 8MHz over the full operating temperature range (-40°C to 105°C). For applications requiring precise timing—such as communication protocols or motor control—this drift can introduce significant error if not compensated. In such cases, replacing the internal oscillator with an external crystal provides better frequency stability (±20 ppm typical), albeit at added cost and board space. Designers must evaluate whether software calibration or hardware precision aligns with their system’s jitter tolerance.
Can the ATMEGA16L-8AQ safely interface with 5V logic levels when powered by a 3.3V supply?
Yes, the ATMEGA16L-8AQ supports mixed-voltage operation within its 2.7V–5.5V VCC range. When supplied at 3.3V, its I/O pins remain compatible with 5V-tolerant inputs due to built-in clamping diodes, allowing safe connection to 5V systems without additional level-shifting circuitry. However, output voltages will reflect the 3.3V rail, so interfacing with 5V receivers may require pull-up resistors or Schottky diodes to prevent damage during transient conditions.
What trade-offs exist between using the internal versus external clock sources in the ATMEGA16L-8AQ for battery-operated devices?
Using the internal 8MHz oscillator eliminates the need for discrete crystals or oscillators, reducing component count, PCB footprint, and cost—beneficial for space-constrained or low-cost designs. However, this comes at the expense of reduced timing precision and potential wake-up latency due to slower start-up time. In contrast, an external crystal improves accuracy and enables lower power modes with faster wake times, which may justify added components in ultra-low-power scenarios where duty cycling is aggressive.
How should bootloader implementation affect flash memory allocation and application code organization when developing firmware for the ATMEGA16L-8AQ?
The ATMEGA16L-8AQ includes a dedicated bootloader section accessible via hardware or software reset vectors. Enabling a bootloader reserves part of the 16KB flash (typically 1KB–4KB depending on fuse settings), reducing available user code space. Careful planning is required to partition application logic accordingly. Additionally, interrupt vectors may shift during bootloader execution, necessitating vector table relocation in advanced implementations. This overhead must be weighed against the convenience of in-system programming and field updates.
What factors determine the effectiveness of brown-out detection (BOD) configuration in the ATMEGA16L-8AQ during power-up transients?
Brown-out detection monitors VCC and triggers a system reset if voltage drops below a programmable threshold—commonly set to 2.7V or 4.3V via fuses. The BOD response time depends on capacitor discharge characteristics at the VCC pin; larger bulk capacitors slow down the rate of voltage decay, potentially masking brief dips. Proper selection of bypass capacitance and careful layout minimize false resets while ensuring stable startup. For systems with regulated supplies, enabling BOD adds robustness against brown-out events during load switching.
Is the ATMEGA16L-8AQ suitable for automotive-grade applications given its industrial temperature rating?
While the ATMEGA16L-8AQ meets industrial temperature specifications (-40°C to +105°C), it is not qualified to automotive standards (e.g., AEC-Q100). Automotive environments impose stricter requirements for thermal cycling, EMI/EMC performance, and long-term reliability under vibration. Unless the target application falls outside automotive use cases, designers should consider automotive-certified variants or alternative MCUs explicitly rated for such conditions to meet safety and longevity criteria.
How does EEPROM endurance compare to flash write cycles in the context of data logging applications using the ATMEGA16L-8AQ?
The ATMEGA16L-8AQ provides 512 bytes of EEPROM with an endurance of approximately 100,000 write cycles, far exceeding the ~10,000 cycle limit of its flash memory. For frequent data logging tasks, this makes EEPROM ideal for storing configuration flags or recent values, while flash remains better suited for static code storage. Designers should implement wear-leveling algorithms or batch writes to extend flash lifespan, whereas EEPROM can handle higher-frequency updates with minimal degradation.
What precautions are necessary when programming the ATMEGA16L-8AQ to avoid unintended device lockup due to incorrect fuse settings?
Incorrectly configuring clock source or brown-out detection fuses can render the ATMEGA16L-8AQ unresponsive. For instance, selecting an unimplemented external clock without one connected halts execution. Always verify fuse bits using a programmer with readback capability before finalizing production firmware. Additionally, preserving the watchdog timer disable bit prevents accidental resets during development. Backup recovery strategies, such as high-voltage serial programming (HVSP), are advisable when working with locked devices.
How does the number of I/O pins and PWM channels influence peripheral design decisions when utilizing the ATMEGA16L-8AQ?
With 32 general-purpose I/O lines and six 8-bit PWM outputs, the ATMEGA16L-8AQ supports multiple servo controls, LED dimming, or motor speed regulation. However, shared pin functionality (e.g., ADC input also serving as digital I/O) requires careful multiplexing. Designers must allocate dedicated pins for high-fidelity analog sampling to avoid noise coupling into digital paths. Exceeding available PWM channels may necessitate software-based PWM or expansion via external drivers.
What role does the watchdog timer play in enhancing system reliability for unattended operations using the ATMEGA16L-8AQ?
The watchdog timer (WDT) automatically resets the ATMEGA16L-8AQ if software fails to periodically clear it, mitigating hangs caused by infinite loops or stack overflows. Configurable timeout periods (16ms to 8s) allow tuning based on application responsiveness needs. For long-running embedded systems, enabling WDT with appropriate intervals ensures graceful recovery from faults without manual intervention, improving uptime in remote deployments such as monitoring nodes or IoT gateways.
How does power consumption scale across different operational modes in the ATMEGA16L-8AQ, and what strategies optimize it for battery life?
In active mode at 8MHz and 3.3V, the ATMEGA16L-8AQ draws roughly 1.5mA; in power-down mode, current drops to microamps. Leveraging sleep modes (idle, ADC noise reduction, power-save) dramatically reduces average power. Disabling unused peripherals, lowering clock frequency, and using interrupt-driven wake-up further extend battery runtime. Dynamic voltage scaling isn’t natively supported, but software throttling combined with sleep states achieves similar benefits for intermittent workloads.
What steps ensure compliance with RoHS and environmental regulations when sourcing the ATMEGA16L-8AQ for commercial or industrial products?
The ATMEGA16L-8AQ is RoHS3 compliant and REACH unaffected, meaning it contains no restricted substances above regulatory thresholds. Sourcing from authorized distributors guarantees traceability and authentic parts, avoiding counterfeit risks. Documentation such as Certificates of Compliance (CoC) should accompany procurement to satisfy auditing requirements in regulated markets. End-product marking must adhere to local e-waste directives, especially in EU jurisdictions requiring producer responsibility schemes.

Parts with Similar Specifications

The three parts on the right have similar specifications to Atmel ATMEGA16L-8AQ

Product Attribute ATMEGA16L-8AQR ATMEGA16L-8AQ ATMEGA16L-8AQR ATMEGA16L-8AU
Part Number ATMEGA16L-8AQR ATMEGA16L-8AQ ATMEGA16L-8AQR ATMEGA16L-8AU
Manufacturer Microchip Technology Microchip Technology Atmel Atmel
Mounting Type - Surface Mount Through Hole Surface Mount
Number of I/O - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Oscillator Type - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Program Memory Size - - - -
Program Memory Type - - - -
RAM Size - - - -
Series - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Connectivity - - - -
Speed - - - -
EEPROM Size - - - -
Core Size - - - -
Core Processor - - - -
Peripherals - - - -
Data Converters - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Supply (Vcc/Vdd) - - - -

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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.

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Brazil 7
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New Zealand 5
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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.
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ATMEGA16L-8AQ Image

ATMEGA16L-8AQ

Atmel
98D-ATMEGA16L-8AQ

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