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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~ATMEGA16HVB-8X3R~~

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ATMEGA16HVB-8X3R - Atmel

Manufacturer Part Number: ATMEGA16HVB-8X3R

Manufacturer: Atmel

Allelco Part Number: 98D-ATMEGA16HVB-8X3R

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 21,000 pcs available, New & Original

Parts Description: IC MCU 8BIT 16KB FLASH 44TSSOP

Package: 44-TSSOP

Data sheet: -

RoHs Status: ROHS3 Compliant

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In stock: 21000

Unit Price: $8.07
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Specifications

ATMEGA16HVB-8X3R Tech Specifications
Atmel - ATMEGA16HVB-8X3R technical specifications, attributes, parameters and parts with similar specifications to Atmel - ATMEGA16HVB-8X3R

Product Attribute	Attribute Value
Manufacturer	Atmel
Voltage - Supply (Vcc/Vdd)	4V ~ 25V
Supplier Device Package	44-TSSOP
Speed	8MHz
Series	AVR® ATmega
RAM Size	1K x 8
Program Memory Type	FLASH
Program Memory Size	16KB (8K x 16)
Peripherals	POR, WDT
Package / Case	44-TFSOP (0.173", 4.40mm Width)
Package	Bulk

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Number of I/O	17
Mounting Type	Surface Mount
EEPROM Size	512 x 8
Data Converters	A/D 7x12b
Core Size	8-Bit
Core Processor	AVR
Connectivity	I²C, SPI
Base Product Number	ATMEGA16

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
ECCN	EAR99
HTSUS	8542.31.0001

Frequently Asked Questions(FAQ)

How does the ATMEGA16HVB-8X3R's voltage tolerance compare to other AVR ATmega microcontrollers when used in automotive or industrial power environments?: The ATMEGA16HVB-8X3R supports a supply voltage range from 4V to 25V, which is notably broader than many standard AVR ATmega variants that typically operate at 2.7V to 5.5V. This extended range makes it more suitable for systems with unstable or high-voltage rails, such as those powered by batteries with voltage sag or unregulated wall adapters. For instance, in automotive applications where load dumps can spike up to 40V, the device’s robustness under transient conditions must be verified through external protection circuitry like TVS diodes, despite its internal voltage tolerance. Compared to the ATMEGA328P, which maxes out at 5.5V, the ATMEGA16HVB-8X3R offers greater flexibility in harsh electrical environments.

What are the key trade-offs between using the internal oscillator and an external crystal with the ATMEGA16HVB-8X3R in time-critical embedded systems?: The ATMEGA16HVB-8X3R features an internal calibrated RC oscillator running at 8MHz with ±10% accuracy, which eliminates the need for external crystals but introduces timing uncertainty. In contrast, using an external crystal improves frequency stability to ±20ppm, essential for precision timing in communication protocols like UART baud rate generation or I2C clock stretching. While the internal oscillator reduces component count and board space, designs requiring accurate timing over temperature (e.g., -40°C to 85°C) may experience cumulative errors exceeding acceptable thresholds—such as >1% drift across the full operating range. Therefore, mission-critical systems often prefer external oscillators despite added cost and layout complexity.

Can the ATMEGA16HVB-8X3R reliably drive legacy peripherals requiring higher logic levels than its core voltage allows?: The ATMEGA16HVB-8X3R operates with Vcc ranging from 4V to 25V, but its I/O pins are not designed to output voltages beyond the supply rail. When interfacing with older 5V logic devices (e.g., RS-232 transceivers or discrete ICs), direct connection risks violating absolute maximum ratings if Vcc < 5V. Even with Vcc = 5V, the output high voltage may drop below 4.5V under load, potentially failing TTL-compatible input thresholds. Level-shifting circuits using MOSFETs or dedicated transceivers are typically required. Unlike some modern MCUs with 5V-tolerant inputs, this device does not inherently support 5V signaling unless powered at or above that level.

How does the memory architecture of the ATMEGA16HVB-8X3R influence real-time data logging applications compared to larger-memory alternatives?: With 1KB of SRAM and 512 bytes of EEPROM, the ATMEGA16HVB-8X3R has limited onboard storage, necessitating frequent data flushing to external memory in continuous logging scenarios. For example, capturing sensor data sampled every 10ms at 7 analog channels (12-bit ADC) consumes ~168 bytes per second; sustained operation would require writing to flash or EEPROM every few minutes, risking wear on the 10,000-cycle EEPROM endurance limit. Larger AVRs like the ATMEGA2560 offer 8KB RAM, enabling buffering strategies that reduce write frequency. Thus, while sufficient for moderate logging rates (<10Hz per channel), higher-throughput applications demand external FRAM or SD cards to avoid performance bottlenecks.

Is it feasible to use the ATMEGA16HVB-8X3R in battery-powered IoT nodes without compromising reliability during deep discharge cycles?: Yes, the ATMEGA16HVB-8X3R can operate down to 4V, making it compatible with two-cell Li-ion batteries (nominal 7.4V) even as they discharge to 6V—well within specification. However, performance degrades near the lower end: internal oscillator accuracy worsens, and flash programming may fail below 4.5V. Additionally, wake-up times from sleep modes increase significantly at reduced voltages due to slower clock recovery. Designers should implement brown-out detection (BOD) set to 2.7V to prevent erratic behavior and ensure safe shutdown before voltage drops below operational limits.

What considerations apply when cascading multiple SPI devices with the ATMEGA16HVB-8X3R in compact PCB layouts?: The ATMEGA16HVB-8X3R provides one hardware SPI interface with standard CS lines, but sharing the same bus among multiple slaves requires careful attention to signal integrity. Long traces or poor impedance matching can cause setup/hold violations, especially at 8MHz clock speed. Pull-up resistors on MISO lines may be needed if devices tri-state during idle states. Furthermore, the lack of dedicated hardware SS control means software-based chip selection adds overhead. In contrast, microcontrollers with dual SPI peripherals allow independent bus management, reducing contention. For dense designs, adding buffer drivers or using shift registers with open-drain outputs helps maintain reliable communication.

How should thermal management be approached when deploying the ATMEGA16HVB-8X3R in enclosed industrial enclosures?: Although the ATMEGA16HVB-8X3R has no specified junction-to-ambient thermal resistance, typical 44-pin TSSOP packages dissipate heat primarily through conduction via solder joints and PCB copper. Under continuous 8MHz operation with all I/O active, self-heating may raise die temperature by 10–15°C above ambient, which remains within the -40°C to 85°C commercial grade rating. However, in sealed enclosures with poor airflow (e.g., 30°C ambient), cumulative heating from adjacent components could push the MCU closer to its limit. Adequate ground plane exposure and thermal vias beneath the package enhance heat spreading. No active cooling is required, but layout density should avoid placing high-power elements directly above critical traces.

What role does the watchdog timer play in ensuring system resilience when using the ATMEGA16HVB-8X3R in fault-prone environments?: The ATMEGA16HVB-8X3R includes a configurable watchdog timer (WDT) that resets the MCU if software hangs due to interrupts, stack overflows, or external noise corrupting program flow. With a factory-calibrated internal oscillator, the WDT offers predictable timeout periods—typically 16–256ms depending on prescaler settings—without relying on external timing references. This is crucial in systems exposed to electromagnetic interference or brownout events where code execution might stall. Unlike software-based watchdogs, the hardware WDT operates independently of the main clock, providing fail-safe recovery even during core lockup. Proper initialization includes clearing the WDT flag promptly after servicing to prevent unintended resets.

How does the ADC resolution and sampling rate of the ATMEGA16HVB-8X3R affect sensor fusion algorithms requiring synchronized multi-channel data?: The ATMEGA16HVB-8X3R integrates a 12-bit successive approximation ADC with seven channels, achieving a maximum sampling rate of 15 kSPS per channel in free-running mode. When multiplexing across all channels, the effective rate drops to ~2.1 kSPS per channel. For applications like inertial measurement units requiring simultaneous acceleration and temperature sensing, this latency introduces skew between samples. Sensor fusion algorithms relying on correlated data (e.g., Kalman filters) degrade in accuracy if channel switching delays exceed sensor response times. Alternatives include external ADCs with simultaneous sampling capability or prioritizing critical channels via interrupt-driven acquisition. Internal gain amplifiers allow single-ended measurements down to 1.2V, useful for amplifying small differential signals but adding conversion overhead.

What precautions are necessary when bootloading firmware onto the ATMEGA16HVB-8X3R using ISP programming?: Before ISP programming the ATMEGA16HVB-8X3R, ensure Vcc is stable within 4V–25V and the RESET pin is pulled high via a 10kΩ resistor to prevent accidental entry into programming mode. The flash memory supports in-system reprogramming, but erase/write cycles consume significant current (~10mA), so power supplies must sustain peak loads during programming. Also, disabling the WDT before initiating the bootloader prevents premature reset. Compared to devices with built-in bootloaders, this MCU requires external code to manage flash sectors, increasing development effort. Successful programming also depends on correct fuse bit configuration—particularly the BOOTRST and SUT fuses—to ensure proper vector table alignment post-flash.

Parts with Similar Specifications

The three parts on the right have similar specifications to Atmel ATMEGA16HVB-8X3R

Product Attribute
Part Number	ATMEGA16HVB-8X3R	ATMEGA16HVB-8X3	ATMEGA16HVB-8X3	ATMEGA16HVA-4TUR
Manufacturer	Microchip Technology	Microchip Technology	Atmel	Microchip Technology
Connectivity	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Peripherals	-	-	-	-
Number of I/O	-	-	-	-
Program Memory Type	-	-	-	-
Core Processor	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Core Size	-	-	-	-
Program Memory Size	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Series	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Oscillator Type	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Data Converters	-	-	-	-
Voltage - Supply (Vcc/Vdd)	-	-	-	-
EEPROM Size	-	-	-	-
RAM Size	-	-	-	-
Speed	-	-	-	-

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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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America	United States	5
America	Brazil	7
Europe	Germany	5
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Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
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Middle East	Israel	6

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1.00kg-2.00kg	USD$40.00 - USD$80.00
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