ATMEGA328PB-ABTVAO - 16MHz 32KB 32-TQFP AVR MCU | Microchip
MPN: ATMEGA328PB-ABTVAO ✓ ActiveATMEGA328PB-ABTVAO Overview
An 8-bit microcontroller is a programmable semiconductor containing a CPU core, memory and integrated peripherals on one package. The ATmega328PB belongs to the AVR family of reduced-instruction-set-computing devices and is positioned below general-purpose microcontrollers in complexity. Its deterministic execution model and extensive peripheral integration make it suitable for control systems, consumer products, industrial equipment and automotive subsystems that do not require a high-performance application processor.
Key device features include 32 KB of program flash, 2 KB of EEPROM, 4 KB of SRAM, 27 general-purpose I/O lines and 32 general-purpose working registers. The manufacturer describes the picoPower architecture as capable of throughputs close to 1 MIPS per MHz. Two flexible timer/counter blocks support periodic measurement, timing and event handling, while the I/O count enables multiple digital interfaces without requiring a larger package.
The ATmega328PB uses the AVR enhanced RISC architecture and executes instructions within a single clock cycle. Read-while-write capability in flash supports efficient program-memory access, while the integrated EEPROM preserves nonvolatile configuration or calibration data. Its operating temperature rating of 105°C distinguishes this automotive-temperature ordering from versions limited to lower commercial or industrial temperature ceilings.
Typical applications include automotive body and environment controls, compact industrial controllers, sensor nodes, serial-interface equipment and Arduino-compatible embedded platforms. The 32-pin TQFP footprint is easy to inspect and rework, and the large exposed perimeter and fine lead pitch provide a practical balance between pin availability, manufacturability and board area. The 32 general-purpose I/O pins leave electrical connectivity for power, ground, programming, clocking, reset, communications and application-specific signals.
Designers should verify every peripheral, pin-multiplexing choice, fuse configuration and communication interface against the manufacturer datasheet before releasing a PCB. The automotive-temperature grade does not by itself establish AEC-Q100 qualification, functional-safety compliance or suitability for every vehicle subsystem. Decoupling, programming-header access, clock stability and unused-pin treatment also require board-level review.
This product page consolidates verified distributor and manufacturer information, same-package ATmega328PB alternatives, application guidance and design cautions. It is intended to support faster engineering selection while clearly separating confirmed facts from parameters that still require confirmation from the complete Microchip datasheet or application-specific qualification records.
Drop-in alternatives for ATMEGA328PB-ABTVAO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA328PB-ABTVAO (same form factor and footprint) — differing in Package, EEPROM, Flash Memory, SRAM, Core Processor.
ATMEGA328PB-AU
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ATMEGA328PB-AN
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ATMEGA328PB-ANR
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ATMEGA328PB-ABTV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATMEGA328PB-ABTVR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATMEGA328PB-ABTVAO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit RISC microcontroller |
| Architecture | AVR enhanced RISC |
| Maximum Clock Frequency | 16 MHz |
| Flash Memory | 32 KB |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| General-Purpose I/O Lines | 27 lines |
| General-Purpose Working Registers | 32 registers |
| Timer/Counter Blocks | 2 |
| Package | 32-pin TQFP, 7 x 7 mm |
| Maximum Temperature | 105°C |
| Mounting Type | Surface mount |
| Packaging | Tape and reel |
| Processor Core | picoPower AVR |
| Instruction Throughput | Close to 1 MIPS per MHz |
| Flash Read-While-Write | Supported |
ATMEGA328PB-ABTVAO 32-pin tqfp, 7 x 7 mm Pin Configuration Guide
Pin configuration for ATMEGA328PB-ABTVAO (32-pin tqfp, 7 x 7 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA328PB-ABTVAO.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA328PB-ABTVAO is suitable for 6 applications: Automotive Body Control Module, Industrial Sensor Node, Temperature and Humidity Monitor, Serial Communication Controller, LED Lighting Controller, Compact Educational Controller.
Automotive Body Control Module
ATMEGA328PB-ABTVAO fits compact body-control modules that coordinate switches, lamps, locks and other discrete inputs and outputs. Its 16 MHz AVR core, 27 general-purpose I/O lines, two timer/counter blocks and 4 KB of SRAM provide deterministic control resources without a higher-power application processor. The documented 105°C maximum temperature supports evaluation in elevated-temperature vehicle environments, although AEC-Q100 qualification must be verified separately rather than inferred from the temperature grade. The 32-pin TQFP also leaves dedicated pins for power, ground, reset, programming and external interfaces. A production design should use automotive-rated passives, provide robust input protection, isolate external wiring from the microcontroller and validate brownout, reset and transient behavior across the complete vehicle electrical environment.
Recommended
Industrial Sensor Node
The ATMEGA328PB-ABTVAO can serve as the local controller in a compact industrial sensor node that samples inputs, applies filtering and transmits results over a serial interface. Its 32 KB flash accommodates application firmware, 2 KB of EEPROM supports nonvolatile settings and 4 KB of SRAM provides working space for moderate buffering. Two flexible timer/counters can organize periodic sampling or communication timing, while the 27 general-purpose I/O lines permit digital sensors and status indicators. Operation up to 105°C allows consideration for hot industrial enclosures, but designers must verify the lower temperature limit and apply appropriate isolation, surge protection and environmental qualification. Firmware should include watchdog recovery, brownout handling and safe defaults for sensor faults to prevent a transient condition from propagating into the monitored process.
Recommended
Temperature and Humidity Monitor
ATMEGA328PB-ABTVAO is suitable for a compact environmental monitor that combines digital sensing with local status indication and periodic data reporting. The two timer/counter blocks can provide periodic measurement intervals, while the 27 available I/O lines simplify connections to digital sensors, alarm outputs and communication peripherals. The device's 32 KB flash, 2 KB EEPROM and 4 KB SRAM are sufficient for calibration tables, configuration data and basic control logic in many monitoring designs. Its 105°C maximum operating temperature provides useful margin for equipment exposed to elevated internal temperatures. Calibration data should be stored with suitable integrity checks, sensor errors must be distinguished from valid measurements, and the enclosure should be tested for condensation, self-heating and thermal gradients that could otherwise degrade measurement accuracy.
Recommended
Serial Communication Controller
ATMEGA328PB-ABTVAO can act as the supervisory controller for a small serial interface or protocol-conversion product. The 16 MHz AVR core and 32 general-purpose working registers support interrupt-driven communication tasks, while 32 KB of flash accommodates protocol handlers and 4 KB of SRAM supports transient message processing. Two timer/counter blocks are available for baud-rate generation, timeouts or periodic transmission in designs that rely on the device's documented peripherals. The 27 general-purpose I/O lines allow multiple interfaces and control signals to coexist without a larger package. Engineers should use the datasheet-supported USART functions where possible, validate line levels with the selected transceiver and include flow control when the data rate can exceed receiver capacity. ESD protection and grounding require separate review because microcontroller pins do not provide complete board-level surge protection.
Recommended
LED Lighting Controller
ATMEGA328PB-ABTVAO can control LED drivers, status indicators or decorative lighting sequences where timing and low standby consumption matter. Its timer/counter resources provide deterministic periodic timing, and its 27 general-purpose I/O lines allow multiple channels to be switched through external transistors. The 32 KB flash can store animation tables and control logic, while the 2 KB EEPROM preserves brightness settings or calibration values across power cycles. The picoPower-based ATmega328PB architecture is positioned for low-power embedded operation, making sleep modes and wake-up behavior useful in duty-cycled installations. MOSFET or transistor selection must account for LED current, voltage and switching transients, while the common ground and return-current layout should prevent injected current from disturbing the MCU. Dimming periods should also remain within the LED driver's supported limits.
Recommended
Compact Educational Controller
ATMEGA328PB-ABTVAO can serve as a compact educational controller for projects involving digital inputs, timers, serial communication and embedded programming. The AVR instruction architecture and 16 MHz clock provide a manageable platform for learning while retaining 32 KB flash, 2 KB EEPROM and 4 KB SRAM. Twenty-seven general-purpose I/O lines give students access to substantial parallel connectivity, and the 32-pin TQFP footprint is compatible with many introductory AVR development-board layouts when ordering and pin functions are checked carefully. The microcontroller is suitable for teaching motor control, sensor conditioning, pulse-width modulation and state-machine design. Because the target ordering supports operation to 105°C, it is more than adequate for room-temperature educational equipment; nevertheless, a lower-cost or broader-availability ordering may be preferable when that enhanced rating is unnecessary.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA328PB-ABTVAO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA328PB-AU | ATMEGA328PB-AN | ATMEGA328PB-ANR | ATMEGA328PB-ABTV | ATMEGA328PB-ABTVR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
Key Differentiators
- Documented elevated-temperature ordering (vs ATMEGA328PB-AU)
- Same-family pin and memory compatibility (vs ATMEGA328PB-AN)
- Automotive-oriented ordering and 105°C rating (vs ATMEGA328P-AU)
Design Notes
Do not treat every ATmega328P as a drop-in replacement for ATMEGA328PB-ABTVAO. The verified Pololu-hosted Microchip application note states that ATmega328PB is not an official drop-in replacement for ATmega328 variants, even though existing code is backward compatible. Review the complete pin descriptions and board schematic, including the pins identified as different, before approving an ATMEGA328P-AU, ATMEGA328P-ANR or ATMEGA328P-MUR substitution.
Use the manufacturer's specified operating-voltage range and decoupling network when completing the power circuit. The supplied excerpts do not include the input-voltage limits, recommended capacitor values or ESR requirements, so those values must be taken from the official ATmega328PB datasheet rather than inferred. Place the input capacitor and regulated supply connection close to the corresponding device pins, provide a clean ground return and verify brownout behavior across startup, shutdown and the highest expected operating temperature.
The 32-pin TQFP land pattern must follow the manufacturer package drawing, including pin-1 orientation, lead pitch and solder-mask recommendations. Leave programming access for ISP and verify reset, clock and unused-pin treatment in the schematic. Because ATMEGA328PB-ABTVAO is intended to operate up to 105°C, thermal analysis should include copper available under the package and the temperature rise of nearby regulators, sensors and communication components rather than relying only on the MCU's maximum rating.
Compliance Information
The verified distributor description identifies the target as green, but the supplied excerpts do not provide formal RoHS, REACH, AEC-Q100, lead-free, halogen-free or conflict-minerals declarations. The 105°C temperature rating must not be treated as evidence of AEC-Q100 qualification.
