ATMEGA6450-16AU - 8-Bit AVR MCU 16MHz 64KB Flash | Microchip
Référence : ATMEGA6450-16AU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $11.9 | $11,90 |
| 10 | $10.79 | $107,90 |
| 100 | $9.61 | $961,00 |
| 500 | $8.65 | $4 325,00 |
| 1 000 | $7.85 | $7 850,00 |
ATMEGA6450-16AU Présentation
An AVR ATmega microcontroller is a reduced-instruction-set (RISC) 8-bit MCU built on the AVR advanced RISC architecture. Within the power-management hierarchy, an MCU integrates a processor core, program memory, data memory, peripherals, and clock generation into a single integrated circuit, replacing discrete logic and serving as the primary control element in embedded systems.
Key features include the advanced RISC core with 130 powerful instructions, most executed in a single clock cycle; 64 KB of self-programmable Flash organized as 32K x 16 with the In-System Programmability (ISP) and boot-code capability that made the AVR family an industry standard; and a rich peripheral set including JTAG for on-chip debugging, an 8-channel/10-channel 10-bit ADC, and serial interfaces (USART, SPI, TWI/I2C). The MegaCore open-source Arduino support package also targets this family directly.
Technical depth: the AVR Harvard architecture separates program and data buses, enabling most instructions to complete in one clock cycle and yielding roughly ten times the throughput per megahertz of conventional CISC 8-bit MCUs. The 130-instruction set is largely single-cycle, with eight general-purpose working registers directly connected to the ALU. In-System Programmable Flash allows firmware updates on the final product via the SPI interface, and the boot section supports self-programming for field upgrades.
Typical applications include industrial automation controllers, building automation and LCD-based operator interfaces, instrumentation front ends, and general-purpose embedded control where 64 KB of code density, a 16 MHz clock, and a high I/O-count 100-pin footprint are required. Designers choose this part when the smaller ATmega3250 (32 KB) is insufficient for application code.
Design consideration: the -16AU grade is specified for 4.5 V to 5.5 V supply; designs running at 3.3 V must select an -8A (2.7-5.5 V) grade at a lower clock, so confirm rail voltage before layout.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour ATMEGA6450-16AU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA6450-16AU (même facteur de forme et même empreinte) — différant par Package, EEPROM, SRAM, Operating Temperature, Supply Voltage Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA6450-16AI
✅ Remplacement direct✓ En stock
$6.2 / unité
Voir la fiche technique →ATMEGA6490-16AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$8.65 / unité
Voir la fiche technique →ATMEGA3250-16AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.74 / unité
Voir la fiche technique →ATMEGA3290-16AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA640-16AUR
✅ Remplacement direct✓ En stock
$6.2 / unité
Voir la fiche technique →ATMEGA6450-16AU Valeurs maximales et caractéristiques électriques
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Program Memory Size | 64 KB (32K x 16) Flash |
| EEPROM Size | 2 KB |
| RAM Size | 4 KB |
| Supply Voltage (Vcc/Vdd) | 4.5 V to 5.5 V |
| ADC Resolution | 10-bit |
| Oscillator Type | Internal |
| Boîtier / Format | 100-TQFP (14x14 mm) |
| Type de montage | Surface Mount |
| Program Memory Type | In-System Programmable FLASH |
| Architecture | Advanced RISC, 130 instructions |
Guide de configuration des broches du ATMEGA6450-16AU 100-tqfp (14x14 mm)
Configuration des broches du ATMEGA6450-16AU (boîtier 100-tqfp (14x14 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour ATMEGA6450-16AU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATMEGA6450-16AU convient pour 6 applications: Industrial Automation Controllers, Building Automation and Operator Interfaces, Instrumentation and Data Acquisition Front Ends, General-Purpose Embedded Control, Motor Control and Actuator Drivers, Legacy 5V System Maintenance and Retrofit.
Industrial Automation Controllers
The ATMEGA6450-16AU fits industrial controller boards that need substantial code space and many I/O lines on a single 5 V rail. Its 64 KB ISP Flash accommodates communication stacks and state machines, while 4 KB SRAM supports buffering and lookup tables; the 16 MHz core delivers 16 MIPS, ample for deterministic scan loops of a few hundred microseconds. The 54-port-I/O, seven-port architecture (A through G) drives relays, optocouplers, and status LEDs directly through driver transistors, and the 10-bit ADC reads potentiometers and analog setpoints. Because the part runs from a single 4.5 V to 5.5 V rail, it drops into legacy 5 V industrial backplanes without level shifting, reducing BOM cost and board area versus a 3.3 V MCU plus translator ICs.
Recommandé
Building Automation and Operator Interfaces
For building automation panels and operator interfaces, the ATMEGA6450-16AU offers the code density to hold menu trees, communication firmware, and localization strings, with 2 KB of on-chip EEPROM retaining configuration across power cycles without external NVRAM. The ATmega family's TWI (I2C) and SPI peripherals connect RTCs, non-volatile memories, and sensor expanders, while the USART handles Modbus-style serial links. Designs that additionally require a multiplexed segment LCD should consider the pin-compatible ATMEGA6490-16AU, which integrates the LCD controller within the identical 100-TQFP footprint, enabling a single PCB to serve both LCD and non-LCD product variants. In-System Programmable Flash allows field firmware updates over the existing serial connection, a significant serviceability advantage in installed building systems.
Recommandé
Instrumentation and Data Acquisition Front Ends
Measurement instruments benefit from the ATMEGA6450-16AU's combination of a 10-bit ADC, 16 MHz processing, and large program memory. The 64 KB Flash stores calibration tables, filtering routines, and multi-protocol command sets that smaller AVRs cannot hold, while 4 KB SRAM buffers sample streams between ADC conversions and host transfers. The JTAG interface supports on-chip debugging during firmware development, shortening bring-up cycles for multi-layer analog boards where rework is difficult. Running the ADC with a clean 5 V analog rail and AREF bypassing typically yields effective resolution in the 9-to-10-bit range for low-noise front ends; for higher-resolution systems, pair the MCU with an external delta-sigma converter over SPI. The 5 V supply also simplifies interfacing with industrial 0-5 V sensor signals.
Recommandé
General-Purpose Embedded Control
As a general-purpose embedded controller, the ATMEGA6450-16AU covers the broad middle ground between small AVRs such as the ATmega328P and 32-bit MCUs. The advanced RISC architecture executes most of its 130 instructions in a single clock cycle, so bit-banged protocols and math-heavy loops perform predictably without DSP instructions. Seven I/O ports (54 GPIO lines) drive keyboards, encoders, displays, and actuators, while hardware USART, SPI, and TWI offload serial communication. The MegaCore open-source project brings Arduino IDE support to this exact part number, lowering the barrier for teams migrating prototypes to production. Designers should verify the 4.5 V to 5.5 V supply requirement early: 3.3 V systems must move to a slower -8A grade or add level translation on all I/O.
Recommandé
Motor Control and Actuator Drivers
The ATMEGA6450-16AU suits stepper and DC motor control boards where deterministic timing matters more than floating-point throughput. Timer outputs on the port structure generate PWM at frequencies suited to motor drivers, and the single-cycle RISC core services encoder interrupts with low jitter at 16 MHz. The 64 KB Flash stores acceleration profiles, trapezoidal motion planners, and serial command handling simultaneously, which 32 KB variants often cannot. With 54 GPIO lines, one MCU can coordinate multiple axes plus limit switches and fault feedback. Power stages should use external gate drivers or H-bridge ICs, since the MCU pins supply only logic-level drive current. The 5 V logic rail interfaces cleanly with classic driver families, minimizing component count in retrofit and legacy-compatible motion designs.
Recommandé
Legacy 5V System Maintenance and Retrofit
Many installed industrial products were designed around 5 V AVR MCUs with 100-pin TQFP footprints, and the ATMEGA6450-16AU serves both new builds and lifecycle maintenance of those systems. Because the -16AI variant shares the identical pinout and package, maintenance engineers can upgrade to the industrial temperature grade without PCB changes, improving field reliability marginally at low cost. The part's In-System Programmable Flash means replacement boards can be flashed in-circuit with the original firmware image via SPI, avoiding dedicated production programmers for low-volume service runs. Availability through 8 distributors per Octopart keeps service inventory viable. For designs migrating forward, Microchip's official cross-reference tool identifies compatible AVR successors within the same toolchain and programming ecosystem.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA6450-16AU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA6450-16AI | ATMEGA6490-16AU | ATMEGA3250-16AU | ATMEGA3290-16AU | ATMEGA640-16AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 | 100-TQFP (14x14 mm) - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB | 32 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 2 KB | 2 KB | 4 KB |
| Max Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| LCD Controller | No | No | Yes (segment LCD) | No | Yes (segment LCD) | No |
| Temperature Grade | Commercial (AU) | Industrial (-40C to +85C) | Commercial (AU) | Commercial (AU) | Commercial (AU) | Commercial (AU) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
Principaux différenciateurs
- Double the code density of reduced-memory siblings (vs ATMEGA3250-16AU)
- Industrial temperature drop-in available on identical silicon (vs ATMEGA6450-16AI)
- General-purpose I/O focus over LCD integration (vs ATMEGA6490-16AU)
Notes de conception
The -16AU grade is a 5 V device: the datasheet frequency-versus-voltage curve permits 16 MHz operation only from 4.5 V to 5.5 V. Design the 5 V rail with at least 200 mV of margin under worst-case load, and place 100 nF ceramic decoupling capacitors at each VCC/GND pair plus a bulk 10 uF near the regulator. If the product must run at 3.3 V, switch to an -8A speed grade instead of underclocking this part, since operating the -16AU below 4.5 V at 16 MHz is out of specification.
For the 100-TQFP (14x14 mm) footprint, use a 0.5 mm pitch land pattern per IPC-7351 recommendations and fan out the seven I/O ports with 6-8 mil traces to avoid congestion under the body. Place the ISP header (MOSI, MISO, SCK, RESET, VCC, GND) near the chip edge for in-circuit programming access. Keep the ADC analog inputs routed away from switching nodes, and provide a separate analog ground island tied to digital ground at a single point for best 10-bit ADC performance.
Three recurring mistakes with this device: (1) forgetting that JTAG pins (TCK/TMS/TDO/TDI) are shared with port C - disable JTAG in the fuse bits if those pins are needed as GPIO; (2) leaving RESET floating - always fit a 10k pull-up to VCC, and consider a supervisory reset IC on noisy 5 V rails; (3) assuming EEPROM endurance is unlimited - 100k erase/write cycles is the design limit, so implement wear leveling for frequently written calibration data. Verify fuse settings before first production flash, since incorrect clock fuses can brick field units.
Informations de conformité
Compliance status not stated in the provided verified web data; the FindIC comparison text references a 'GREEN' package variant for the -16AI, suggesting RoHS-compliant lead-free construction for the family, but confirmation requires the official Microchip product page or datasheet.
