ATMEGA3290V-8AUR - AVR 8-bit MCU 32KB Flash 8MHz | Microchip
MPN: ATMEGA3290V-8AUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.78 | $278.00 |
| 500 | $2.52 | $1,260.00 |
| 1,000 | $2.3 | $2,300.00 |
ATMEGA3290V-8AUR Overview
A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and configurable peripherals into one chip. The AVR family popularized single-cycle RISC execution, and this ATmega device sits in the 8-bit MCU hierarchy under Microchip's broader embedded processor portfolio. It executes 131 powerful instructions, most in a single clock cycle, through its advanced RISC architecture with 32 general-purpose working registers.
Key features include 32KB of in-system programmable (ISP) Flash with read-while-write capability, a 10-channel 10-bit ADC, an on-chip segment LCD controller that can drive up to 100 segments directly, two USARTs, and an 8MHz maximum clock frequency. The picoPower technology supports multiple sleep modes, and the device offers JTAG for boundary scan and on-chip debugging plus ISP and parallel programming options.
Architecturally, the Harvard-design AVR core separates program and data buses, allowing simultaneous Flash access during execution. Hardware multiplier support and single-cycle I/O register access deliver up to 8 MIPS throughput at 8MHz. The wide 1.8V to 5.5V supply range lets a single PCB design target both 3.3V and 5V systems, though maximum clock speed scales with voltage.
Typical applications include industrial control panels with built-in LCD displays, battery-powered instrumentation, consumer appliance interfaces, and building automation nodes where the integrated LCD driver removes the need for an external display controller.
Design consideration: at 5V the device can run to its full 8MHz rating, but at 1.8V the safe maximum clock is much lower; consult the datasheet maximum frequency versus supply voltage curve before fixing your clock source and set AVR fuse bits accordingly.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA3290V-8AUR β 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 ATMEGA3290V-8AUR (same form factor and footprint) β differing in Package, Operating Temperature, RoHS Status, LCD Controller, Supply Voltage Range.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA3290P-20AUR
β Drop-Inβ In Stock
Contact for price
View Datasheet βATMEGA3290V-8AU
β Drop-Inβ In Stock
$3.91 / Unit
View Datasheet βATMEGA3290PA-AU
β Drop-Inβ In Stock
$4.48 / Unit
View Datasheet βATMEGA3290-16AI
β Drop-Inβ In Stock
$4.14 / Unit
View Datasheet βATMEGA3250V-8AUR
β Drop-Inβ In Stock
$3.38 / Unit
View Datasheet βATMEGA3250P-20AU
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$1.8 / Unit
View Datasheet βATMEGA3290V-8AUR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Flash Memory Size | 32 KB (16K x 16) |
| EEPROM Size | 1 KB |
| RAM Size | 2 KB |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 69 |
| Peripherals | LCD, POR, PWM, WDT |
| ADC Resolution | 10-bit |
| ADC Channels | 10 |
| Communication Interfaces | SPI, UART/USART, TWI (I2C) |
| Oscillator Type | Internal |
| Operating Temperature | -40C to +85C |
| Package / Case | 100-TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Programming Method | ISP, JTAG, Parallel |
| Life Cycle Stage | Active |
| RoHS Status | Compliant |
ATMEGA3290V-8AUR 100-tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for ATMEGA3290V-8AUR (100-tqfp (14x14 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 ATMEGA3290V-8AUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA3290V-8AUR is suitable for 6 applications: Industrial Control Panels with LCD, Battery-Powered Instrumentation, Appliance User Interfaces, Building Automation Nodes, Test and Measurement Fixtures, Automotive-Adjacent Aftermarket Electronics.
Industrial Control Panels with LCD
The ATMEGA3290V-8AUR fits industrial control panels because its integrated segment LCD controller drives the panel display directly, eliminating an external LCD driver IC and its wiring, while the 69 general-purpose I/O lines handle keypads, relays, and limit-switch inputs on one chip. The 1.8V to 5.5V supply range tolerates unregulated industrial rails after simple protection, and the -40C to +85C temperature grade covers cabinet environments. Designers typically run the device from a 5V rail with a 4MHz or 8MHz crystal, using the two USARTs for Modbus RTU links and the 10-channel 10-bit ADC for potentiometer and sensor feedback, all while the LCD shows live status.
Recommended
Battery-Powered Instrumentation
For battery-powered meters and data loggers, the ATMEGA3290V-8AUR operates down to 1.8V, allowing two-cell alkaline or single-cell lithium architectures without boost converters. The V-grade 8MHz clock limits dynamic current, and idle, power-down, and power-save sleep modes cut average draw to microamp levels between measurements. The 10-channel 10-bit ADC samples sensors, the EEPROM retains calibration constants across battery swaps, and the LCD controller displays readings with no extra driver current path beyond the panel itself. A common topology uses a 32.768kHz watch crystal for the asynchronous timer in power-save mode, waking the AVR core on a schedule, acquiring a sample, updating the LCD, and returning to sleep.
Recommended
Appliance User Interfaces
White-goods and HVAC appliances benefit from the ATMEGA3290V-8AUR because a single chip combines the segment LCD driver, keypad scanning across dozens of I/O pins, and two USARTs for communication with motor-control or power boards. The 32KB Flash accommodates localized multi-language text tables in EEPROM/Flash alongside control firmware, and the internal oscillator removes the crystal cost in timing-tolerant UI applications. The 5V-tolerant wide supply range interfaces directly with legacy 5V appliance logic. Reliability features including the watchdog timer, power-on reset, and brown-out detection keep the interface responsive through mains dips, a frequent event in appliance environments.
Recommended
Building Automation Nodes
In building automation, the ATMEGA3290V-8AUR serves as a wall-unit or zone-controller node: the LCD controller renders setpoints and status locally, 69 I/O lines read dampers, occupancy switches, and relays, and the dual USART plus TWI (I2C) interfaces link to bus transceivers and environmental sensors. The 10-bit ADC digitizes NTC temperature sensors directly, and JTAG boundary scan simplifies production test of the densely populated node PCB. The wide 1.8V to 5.5V operation allows one hardware platform across 3.3V sensor buses and 5V legacy actuators. Sleep modes keep standby power within energy-code budgets when the node idles between communication windows.
Recommended
Test and Measurement Fixtures
Bench instruments and production test fixtures use the ATMEGA3290V-8AUR where a readable local display, abundant I/O for relay matrices and signal routing, and JTAG-based in-system debugging accelerate development. The single-cycle RISC core at 8MHz delivers deterministic timing for stimulus generation, while the 10-bit ADC captures DUT responses for pass/fail evaluation. The two USARTs simultaneously drive a PC logging link and a DUT control link, and ISP programming lets firmware test sequences be updated per product variant without desoldering the MCU. The 100-TQFP leads at 0.8mm pitch simplify fixture sockets compared with fine-pitch BGA alternatives in the same functionality class.
Recommended
Automotive-Adjacent Aftermarket Electronics
Aftermarket automotive accessories such as dash-mounted gauges, trip computers, and retrofit display modules leverage the ATMEGA3290V-8AUR's LCD controller for the primary user interface and its 10-bit ADC for interpreting 0-5V analog sensor taps from the vehicle. The -40C to +85C operating range matches under-dash environments, and the 8MHz clock with internal oscillator reduces component count on vibration-prone assemblies. The 1.8V to 5.5V range simplifies connection to both 5V-regulated and battery-fed clamped rails. The EEPROM stores odometer and configuration data that must survive ignition cycles, and the watchdog timer recovers the UI if transient load-dump events corrupt execution.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA3290V-8AUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA3290P-20AUR | ATMEGA3290V-8AU | ATMEGA3290PA-AU | ATMEGA3250V-8AUR |
|---|---|---|---|---|---|
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 8 MHz | 20 MHz | 8 MHz | 20 MHz | 8 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| USART Count | 2 | 2 | 2 | 2 | 1 |
| LCD Controller | Yes | Yes | Yes | Yes | Yes |
| picoPower Features | No (V-series) | Yes | No | Yes | No |
| SRAM / EEPROM | 2 KB / 1 KB | 2 KB / 1 KB | 2 KB / 1 KB | 2 KB / 1 KB | 2 KB / 1 KB |
Key Differentiators
- Integrated segment LCD controller (vs ATMEGA328PB-AU)
- Wide 1.8V to 5.5V single-chip supply range (vs ATMEGA3290-16AI)
- Two USARTs on-chip (vs ATMEGA3250V-8AUR)
Design Notes
Respect the maximum frequency versus supply voltage curve: while the ATMEGA3290V-8AUR is rated to 8MHz across 1.8V to 5.5V per distributor listings, verify the clock you select is safe at your actual minimum rail voltage before fixing the fuse configuration. For battery designs, place a 100nF ceramic capacitor at every VCC pin pair plus a 10uF bulk capacitor, and enable the brown-out detector at a threshold above your regulator's dropout voltage so sleep-mode brownouts cannot corrupt EEPROM writes.
The 100-TQFP has 0.8mm lead pitch; use a 0.5mm-wide stencil aperture on the 14x14mm footprint and route the JTAG (TDI/TDO/TMS/TCK) header traces first, since in-system debugging and boundary scan depend on them. Keep the analog supply (AVCC) pinned to its own LC filter from the digital rail when using the 10-channel ADC, and dedicate a solid ground pour under the ADC input pins. The LCD segment pins carry small AC drive signals - keep those traces away from the ADC inputs to prevent display coupling into measurements.
Fusing the wrong clock source is the most common field failure: an external crystal selected via CKOPT/fuse settings that the board does not populate will leave the device unresponsive to ISP. Always program a fallback to the internal RC oscillator on first-boot prototypes. Second, the RSTDISBL fuse disables external reset permanently and complicates reprogramming - avoid it. Third, when migrating firmware from an ATMEGA3290V to the P/PA variants, re-verify sleep-mode currents, because register-level picoPower controls differ from the V-series defaults.
Compliance Information
Distributor listings (Mouser, DigiKey) identify this as a RoHS-compliant lead-free part. REACH, halogen-free, and conflict-minerals status not stated in the provided data.
