ATMEGA88PA-AU (8-Bit AVR Microcontroller with PicoPower - TQFP-32 SMD Package)

When you are designing a custom PCB that requires the modern architecture of an ATmega328P but you need to ruthlessly cut both the Bill of Materials (BOM) cost and the power consumption, the ATMEGA88PA-AU is your target silicon. As a direct member of the modern megaAVR family, it features the exact same pinout, peripheral set, and hardware interrupts as the Arduino Uno’s processor. The core difference is its memory footprint—streamlined to 8KB of Flash—and its highly optimized power profile.

The "PA" designation is the critical feature here. The "P" stands for Microchip's PicoPower technology, and the "A" denotes the latest, most efficient silicon revision. This chip is engineered to sip absolute minimal current, boasting deep sleep modes that draw less than a single microamp. Housed in a compact 32-pin Thin Quad Flat Package (TQFP) with a manageable 0.8mm pin pitch, it is the ultimate IC for mass-producing low-power wireless sensor nodes, wearable tech, and battery-backed telemetry devices where every milliamp-hour counts.

Key Features & Functional Advantages:

• PicoPower Technology: Features advanced, ultra-low-power sleep modes (Power-down, Power-save, Standby) that extend the life of coin cells and small LiPo batteries for months or even years.

• Cost-Optimized Memory: Provides 8KB of Flash memory, perfectly sizing the chip for dedicated, streamlined C/C++ firmware, drastically reducing per-unit costs for high-volume production runs.

• Wide Operating Voltage: Operates flawlessly anywhere from 1.8V up to 5.5V, allowing you to run the chip directly off a depleting lithium battery or two AA cells without needing a voltage regulator.

• Modern Peripheral Set: Unlike older legacy chips, it includes Pin Change Interrupts (PCINT) on all 23 I/O pins, a highly accurate internal oscillator, and dedicated hardware USART, SPI, and I2C.

• Surface-Mount TQFP-32: The compact 7x7mm footprint saves crucial board space on your custom PCB while remaining exceptionally easy to assemble in automated pick-and-place lines.

Perfect For:

• Battery-Powered Sensor Nodes: The definitive microcontroller for off-grid environmental sensors communicating via ultra-low-power NRF24L01 or LoRa transceivers.

• Mass Production Hardware: Ideal for commercial IoT and consumer electronics where minimizing the cost of the main processor across thousands of units is a top priority.

• Wearable Electronics: Provides the tiny physical footprint and deep sleep current required for custom smart badges, biometric trackers, and LED wearables.

• Dedicated Sub-Processors: An excellent, cheap co-processor for handling localized tasks (like reading a matrix keypad or managing PWM motor control) while a larger Wi-Fi chip handles network tasks.

Technical Specifications:

• Core Processor: 8-Bit AVR RISC (PicoPower)

• Maximum Clock Speed: 20 MHz (Note: 20MHz operation requires at least 4.5V; lower voltages limit max clock speed)

• Program Memory (Flash): 8 KB

• SRAM: 1 KB

• EEPROM: 512 Bytes

• Operating Voltage Range: 1.8V – 5.5V

• Total I/O Pins: 23

• Analog-to-Digital Converter (ADC): 8 Channels, 10-bit resolution

• Communication Interfaces: 1 x UART/USART, 1 x SPI, 1 x I2C (Two-Wire Interface)

• Package / Case: 32-TQFP (Thin Quad Flat Package)

• Mounting Type: Surface Mount (SMD/SMT)

• Operating Temperature: -40°C to 85°C (Industrial)

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