ATMEGA6450V-8AI - 8-bit AVR MCU 64KB Flash 8MHz | Microchip
MPN: ATMEGA6450V-8AI β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.48 | $1,240.00 |
| 1,000 | $2.25 | $2,250.00 |
ATMEGA6450V-8AI Overview
An AVR microcontroller combines a Harvard-architecture CPU, program Flash, data SRAM, EEPROM and peripheral functions on a single die, sitting within the wider embedded-controller hierarchy of MCU -> microcontroller -> semiconductor. The RISC core executes most instructions in one clock cycle, achieving up to 8 MIPS at 8 MHz while remaining a single-cycle-per-instruction machine for deterministic code timing.
Key features include 64KB (32K x 16) self-programmable Flash supporting in-system and boot-section programming, 4KB internal SRAM for data buffers, 2KB EEPROM for non-volatile parameter storage, and an integrated 10-bit ADC referenced in distributor data at the 1.8V low-voltage operating point. The wide 1.8V-to-5.5V supply range distinguishes the V-variant from standard 2.7V/4.5V parts, allowing operation directly from two alkaline cells or a 5V rail without a regulator.
The architecture uses a fast-register-file design with eight general-purpose working registers directly connected to the ALU, enabling single-cycle arithmetic between registers. Hardware program/boot lock bits, in-system programmable (ISP) Flash and an on-chip debug interface reduce development cycle time and support field firmware updates over UART or SPI bootloaders.
Typical applications include industrial automation control nodes, consumer electronics, and building instrumentation where 64KB of code space, multiple serial links and low-voltage battery operation are required. Distributor listings such as Microchip USA classify the device for industrial automation, consumer and automotive-adjacent use cases.
A key design consideration: at 5V the maximum clock is 8 MHz for the V speed grade, so verify frequency-versus-voltage operating envelopes before overclocking designs migrated from 16 MHz 5V parts.
This page synthesizes verified distributor pricing, drop-in alternative cross-references and practical design guidance not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA6450V-8AI 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 ATMEGA6450V-8AI (same form factor and footprint) β differing in Operating Temperature, EEPROM, Package, SRAM, Flash Memory.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA6450V-8AU
β Drop-Inβ In Stock
$2.31 / Unit
View Datasheet βATMEGA640V-8AUR
β Drop-Inβ In Stock
$9.6 / Unit
View Datasheet βATMEGA6490V-8AUR
β Drop-Inβ In Stock
$9.42 / Unit
View Datasheet βATMEGA1280-16AUR
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA2560-16AUR
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA6450V-8AI Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 64 KB (32K x 16), In-System Programmable |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Maximum Clock Frequency | 8 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| ADC | Yes, 10-bit |
| Package | 100-TQFP (14x14 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| Speed Rating | V (1.8V low-voltage grade) |
| In-System Programming | Yes (ISP / boot section) |
| RoHS Status | Compliant (green package, AI suffix) |
ATMEGA6450V-8AI 100-tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for ATMEGA6450V-8AI (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 ATMEGA6450V-8AI.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA6450V-8AI is suitable for 6 applications: Industrial Automation Control Nodes, Battery-Powered Instruments, Consumer Electronics Control Boards, Data Loggers, Building Automation Sensors, Motor Control and Actuation Subsystems.
Industrial Automation Control Nodes
Industrial PLC-style I/O nodes benefit directly from the ATMEGA6450V-8AI's -40C to +85C industrial rating and 64KB Flash, which is sufficient for communication stacks, PID control loops and Modbus-style protocol handling. The 10-bit ADC digitizes sensor inputs such as thermistors and 4-20mA-conditioned signals, while the 1.8V-5.5V supply tolerance lets the node survive brownouts on noisy factory 24V-derived rails. Its 100-pin TQFP provides the broad GPIO count needed for relay outputs, DIP switches and status LEDs. Place the MCU on a 5V rail with 100nF decoupling at every VCC/GND pair, and use the EEPROM for configuration retention across power cycles.
Recommended
Battery-Powered Instruments
Portable meters and handheld instruments exploit the V-grade 1.8V minimum supply, allowing direct operation from two alkaline cells across their full discharge curve (about 1.8V to 3.0V) without a boost converter. The 8 MHz ceiling matches the voltage-frequency envelope, so the device stays in spec at the lowest cell voltage. The 10-bit ADC with internal reference reads sensors directly, the 2KB EEPROM stores calibration constants, and AVR sleep modes cut average current for multi-year battery life. Design the power tree so brown-out reset thresholds are set below the minimum operating point, and verify crystal start-up at 1.8V during qualification.
Recommended
Consumer Electronics Control Boards
Home appliance and consumer control boards use the ATMEGA6450V-8AI where 64KB of code covers touch-debouncing, LED/LCD driving, buzzer output and simple serial links to power or display modules. The commercial-brother ATMEGA6450V-8AU (0C to +85C, currently $3.42 with 181 units at DigiKey as of 2026-09-18) can be chosen for indoor products to reduce cost, while the AI grade covers garage or outdoor-rated appliances. The wide 1.8V-5.5V range tolerates unregulated mains-adapter supplies, and the 100-pin package gives design margin for product variants sharing one PCB. In-field firmware updates run from the boot section over UART.
Recommended
Data Loggers
Stand-alone data loggers leverage the 4KB SRAM as a buffering window and the 2KB EEPROM for parameter storage, writing bulk records to external SPI or parallel Flash/SD media. The ATMEGA6450V-8AI's 10-bit ADC samples thermistors, potentiometers and analog current loops, while timers generate precise, crystal-referenced sample intervals. Battery operation benefits from the 1.8V floor and low-power sleep between samples; a 32.768 kHz watch crystal enables accurate timekeeping for timestamped records. Keep trace lengths to SD interfaces short and add series resistors on SPI lines to limit ringing when the logger runs from a 5V rail.
Recommended
Building Automation Sensors
Wall-mounted occupancy, temperature and humidity nodes fit the ATMEGA6450V-8AI because the industrial temperature rating survives unconditioned spaces and the wide supply range accommodates bus-powered or battery nodes. The 10-bit ADC reads ratiometric sensor bridges, the USART connects to RS-485 transceivers for the building bus, and GPIO drives relays or actuators in combined sensor/actuator devices. The 100-pin footprint permits one hardware platform for multiple SKUs, differing only in firmware, which reduces the qualification burden. Use the boot section for over-bus field reprogramming and EEPROM storage of node addresses and calibration tables.
Recommended
Motor Control and Actuation Subsystems
Low-end motor controllers use the ATMEGA6450V-8AI's timers to generate PWM for DC motor H-bridges and stepper drivers, with the 10-bit ADC providing back-EMF or current-shunt feedback for closed-loop speed regulation. The 8 MHz clock yields PWM resolutions adequate for fan, pump and conveyor actuators, and the industrial rating suits embedded equipment. The 64KB Flash leaves room for fieldbus protocol stacks alongside the control loop. Gate-drive outputs should be routed with solid ground returns; sense resistor feedback should use Kelvin connections to the ADC channels to keep mV-level shunt signals accurate at 5V full scale.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA6450V-8AI β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA6450V-8AU | ATMEGA640V-8AUR | ATMEGA6490V-8AUR | ATMEGA1280-16AUR | ATMEGA2560-16AUR |
|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14) | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB | 256 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 8 KB | 8 KB |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 16 MHz |
| Supply Voltage Range | 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 | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -40C to +85C | 0C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Special Peripherals | 10-bit ADC, USART, JTAG | 10-bit ADC, USART | 10-bit ADC, multiple USARTs | Segment LCD controller, 10-bit ADC | 10-bit ADC, 4 USARTs | 10-bit ADC, 4 USARTs, large I/O set |
Key Differentiators
- True low-voltage operation down to 1.8V (vs ATMEGA2560-16AUR)
- Industrial temperature grade with current distributor stock (vs ATMEGA6450V-8AU)
- Lower code space but lower cost than 1280/2560 upgrades (vs ATMEGA1280-16AUR)
Design Notes
Estimated: at 5V and 8 MHz, an AVR mega draws on the order of 10-15 mA active (per datasheet typical curves); budget 60-75 mW active and rely on power-down sleep for battery designs. The 1.8V floor means brown-out reset (BOD) thresholds must be programmed below the minimum system voltage - for a 2-cell alkaline design (1.8V end-of-discharge), select the lowest BOD level or disable BOD and verify crystal start-up margin at 1.8V during qualification.
The 100-TQFP has multiple VCC/GND pairs; decouple every power pair with 100nF ceramic capacitors placed within 3-5 mm of the pins, plus one 4.7-10uF bulk capacitor near the supply entry. Use a solid ground plane on layer 2 and connect the exposed fanout vias directly to it. Keep the ISP header (MOSI/MISO/SCK/RESET/GND/VCC) routed away from switching loads such as relays or LED drivers.
The V speed grade is limited to 8 MHz across the full voltage range - do not substitute a 16 MHz crystal from ATMEGA1280/2560 designs, since the 6450V cannot run at speed below 4.5V-class supplies. When migrating from ATMEGA1280/2560, verify the peripheral complement differences (USART count, timer features) and remember those parts require 4.5V-5.5V, making them unsuitable for 3.3V or 2-cell battery rails.
Compliance Information
AI suffix denotes industrial grade in a green, RoHS-compliant package per Microchip naming convention and distributor data. REACH and halogen-free certificates should be confirmed on the Microchip product page for the specific date code.
