ATMEGA2560V-8AU - 256KB Flash, 1.8-5.5V AVR MCU 8MHz | Microchip
Référence : ATMEGA2560V-8AU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $13.72 | $13,72 |
| 10 | $12.35 | $123,50 |
| 100 | $10.99 | $1 099,00 |
| 500 | $9.85 | $4 925,00 |
| 1 000 | $8.95 | $8 950,00 |
ATMEGA2560V-8AU Présentation
A microcontroller (MCU) is a single-chip computer that combines a CPU core, program and data memory, and I/O peripherals such as timers, serial interfaces and interrupt logic on one die. Within the embedded-computing hierarchy the ATmega2560 family sits in the mainstream 8-bit flash MCU class, sitting above smaller ATmega parts such as the ATmega328P and below 32-bit ARM Cortex-M devices when applications demand very large GPIO and peripheral counts rather than raw compute throughput.
Key features include the advanced AVR RISC architecture executing 131 powerful instructions, mostly in a single clock cycle, with 32 general-purpose working registers and fully static operation for up to 16 MIPS throughput at 16 MHz (8 MHz maximum for the V low-voltage grade). The device integrates six flexible timer/counters with compare modes and PWM, four USARTs, a byte-oriented 2-wire serial interface (TWI/I2C), an SPI serial interface, a real-time counter with separate oscillator, a watchdog timer and a 16-channel 10-bit ADC. In-system programming (ISP) and self-programming support enable field firmware updates without removing the chip.
The V suffix denotes the extended 1.8 V to 5.5 V operating range, allowing direct operation from two alkaline cells or a single lithium cell with a boost converter, which makes the ATMEGA2560V-8AU attractive for battery-powered instruments. The Harvard-architecture dual-memory bus keeps program fetch and data access independent, sustaining efficient C-compiled code density, and the on-chip RC oscillator plus XTAL1/XTAL2 crystal inputs reduce external component count while supporting accurate USART baud rates.
Typical applications include industrial automation controllers with large I/O counts, 3D-printer mainboards (the Arduino Mega 2560 platform), robotics controllers, and multi-port data loggers that must exploit four USART channels plus a wide supply range. When designing with this part, consult the maximum clock rate versus VCC curve because at 1.8 V the maximum guaranteed clock drops well below 8 MHz.
This page synthesizes distributor pricing, drop-in same-family alternatives, a full 100-pin TQFP pinout, and practical design notes not consolidated in the manufacturer datasheet. Pricing is referenced as of 2026-09-17.
Alternatives de remplacement direct pour ATMEGA2560V-8AU — 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 ATMEGA2560V-8AU (même facteur de forme et même empreinte) — différant par Package, Flash Memory, RoHS Status, Timers/Counters, ADC.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA2560V-8CUR
✅ Remplacement direct✓ En stock
$6.12 / unité
Voir la fiche technique →ATMEGA2560-16AU
✅ Remplacement direct✓ En stock
$8.87 / unité
Voir la fiche technique →ATMEGA2560-16CU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$11.75 / unité
Voir la fiche technique →ATMEGA1280-16AU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATMEGA1281-16AU
✅ Remplacement direct✓ En stock
$8.27 / unité
Voir la fiche technique →ATMEGA2560V-8AU Valeurs maximales et caractéristiques électriques
| Device Family | ATmega2560 (megaAVR) |
| Core | 8-bit AVR RISC |
| Instruction Set | 131 instructions, mostly single-cycle |
| Max Throughput | 16 MIPS at 16 MHz |
| Program Flash Memory | 256 KB In-System Programmable |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| General Purpose I/O Lines | 86 |
| Operating Voltage (VCC) | 1.8 V to 5.5 V |
| Maximum Clock (V grade) | 8 MHz |
| Température de fonctionnement | -40 C to +85 C (industrial) |
| Timer/Counters | 6 (with compare modes and PWM) |
| USART | 4 channels |
| Serial Interfaces | I2C/TWI, SPI |
| ADC | 16-channel, 10-bit |
| Boîtier | 100-pin TQFP |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de ATMEGA2560V-8AU
| Broche 1 | PG5 (OC0B) — Port G bit 5 / Timer0 compare B output |
| Broche 2 | PE0 (RXD0/PCINT8) — Port E bit 0 / USART0 RX / pin change interrupt |
| Broche 3 | PE1 (TXD0) — Port E bit 1 / USART0 TX |
| Broche 4 | PE2 (AIN0/XCK0) — Port E bit 2 / analog comp in / USART0 clock |
| Broche 5 | PE3 (AIN1/OC3A) — Port E bit 3 / analog comp in / Timer3 compare A |
| Broche 6 | PE4 (OC3B/INT4) — Port E bit 4 / Timer3 compare B / external interrupt |
| Broche 7 | PE5 (OC3C/INT5) — Port E bit 5 / Timer3 compare C / external interrupt |
| Broche 8 | PE6 (T3/INT6) — Port E bit 6 / Timer3 clock input / external interrupt |
| Broche 9 | PE7 (CLKO/ICP3) — Port E bit 7 / system clock output / Timer3 input capture |
| Broche 10 | VCC — Digital supply voltage |
| Broche 11 | GND — Digital ground |
| Broche 12 | PH0 (RXD2) — Port H bit 0 / USART2 RX |
| Broche 13 | PH1 (TXD2) — Port H bit 1 / USART2 TX |
| Broche 14 | PH2 (XCK2) — Port H bit 2 / USART2 clock |
| Broche 15 | PH3 (OC4A) — Port H bit 3 / Timer4 compare A output |
| Broche 16 | PH4 (OC4B) — Port H bit 4 / Timer4 compare B output |
| Broche 17 | PH5 (OC4C) — Port H bit 5 / Timer4 compare C output |
| Broche 18 | PH6 (OC2B) — Port H bit 6 / Timer2 compare B output |
| Broche 19 | PB0 (SS0/PCINT0) — Port B bit 0 / SPI0 slave select / pin change int |
| Broche 20 | PB1 (SCK0/PCINT1) — Port B bit 1 / SPI0 clock / pin change int |
| Broche 21 | PB2 (MOSI0/PCINT2) — Port B bit 2 / SPI0 MOSI / pin change int |
| Broche 22 | PB3 (MISO0/PCINT3) — Port B bit 3 / SPI0 MISO / pin change int |
| Broche 23 | PB4 (OC2A/PCINT4) — Port B bit 4 / Timer2 compare A / pin change int |
| Broche 24 | PB5 (OC1A/PCINT5) — Port B bit 5 / Timer1 compare A / pin change int |
| Broche 25 | PB6 (OC1B/PCINT6) — Port B bit 6 / Timer1 compare B / pin change int |
| Broche 26 | PB7 (OC0A/OC1C/PCINT7) — Port B bit 7 / Timer0 compare A / Timer1 compare C |
| Broche 27 | PH7 (T4) — Port H bit 7 / Timer4 clock input |
| Broche 28 | PG3 (TOSC2) — Port G bit 3 / RTC oscillator output |
| Broche 29 | PG4 (TOSC1) — Port G bit 4 / RTC oscillator input |
| Broche 30 | RESET — Reset input (active low) |
| Broche 31 | VCC — Digital supply voltage |
| Broche 32 | GND — Digital ground |
| Broche 33 | XTAL2 — Crystal oscillator output |
| Broche 34 | XTAL1 — Crystal oscillator input |
| Broche 35 | PL0 (ICP4) — Port L bit 0 / Timer4 input capture |
| Broche 36 | PL1 (ICP5) — Port L bit 1 / Timer5 input capture |
| Broche 37 | PL2 (T5) — Port L bit 2 / Timer5 clock input |
| Broche 38 | PL3 (OC5A) — Port L bit 3 / Timer5 compare A output |
| Broche 39 | PL4 (OC5B) — Port L bit 4 / Timer5 compare B output |
| Broche 40 | PL5 (OC5C) — Port L bit 5 / Timer5 compare C output |
| Broche 41 | PL6 — Port L bit 6 / digital I/O |
| Broche 42 | PL7 — Port L bit 7 / digital I/O |
| Broche 43 | PD0 (SCL/INT0) — Port D bit 0 / I2C clock / external int |
| Broche 44 | PD1 (SDA/INT1) — Port D bit 1 / I2C data / external int |
| Broche 45 | PD2 (RXD1/INT2) — Port D bit 2 / USART1 RX / external int |
| Broche 46 | PD3 (TXD1/INT3) — Port D bit 3 / USART1 TX / external int |
| Broche 47 | PD4 (ICP1) — Port D bit 4 / Timer1 input capture |
| Broche 48 | PD5 (XCK1) — Port D bit 5 / USART1 clock |
| Broche 49 | PD6 (T1) — Port D bit 6 / Timer1 clock input |
| Broche 50 | PD7 (T0) — Port D bit 7 / Timer0 clock input |
| Broche 51 | PG0 (WR) — Port G bit 0 / external SRAM write strobe |
| Broche 52 | PG1 (RD) — Port G bit 1 / external SRAM read strobe |
| Broche 53 | PC0 (A8) — Port C bit 0 / external SRAM address bit 8 |
| Broche 54 | PC1 (A9) — Port C bit 1 / external SRAM address bit 9 |
| Broche 55 | PC2 (A10) — Port C bit 2 / external SRAM address bit 10 |
| Broche 56 | PC3 (A11) — Port C bit 3 / external SRAM address bit 11 |
| Broche 57 | PC4 (A12) — Port C bit 4 / external SRAM address bit 12 |
| Broche 58 | PC5 (A13) — Port C bit 5 / external SRAM address bit 13 |
| Broche 59 | PC6 (A14) — Port C bit 6 / external SRAM address bit 14 |
| Broche 60 | PC7 (A15) — Port C bit 7 / external SRAM address bit 15 |
| Broche 61 | VCC — Digital supply voltage |
| Broche 62 | GND — Digital ground |
| Broche 63 | PJ0 (RXD3/PCINT9) — Port J bit 0 / USART3 RX / pin change int |
| Broche 64 | PJ1 (TXD3/PCINT10) — Port J bit 1 / USART3 TX / pin change int |
| Broche 65 | PJ2 (XCK3/PCINT11) — Port J bit 2 / USART3 clock / pin change int |
| Broche 66 | PJ3 (PCINT13) — Port J bit 3 / pin change int |
| Broche 67 | PJ4 (PCINT14) — Port J bit 4 / pin change int |
| Broche 68 | PJ5 (PCINT15) — Port J bit 5 / pin change int |
| Broche 69 | PJ6 (PCINT16) — Port J bit 6 / pin change int |
| Broche 70 | PJ7 (PCINT17) — Port J bit 7 / pin change int |
| Broche 71 | PA0 (AD0) — Port A bit 0 / external SRAM data 0 |
| Broche 72 | PA1 (AD1) — Port A bit 1 / external SRAM data 1 |
| Broche 73 | PA2 (AD2) — Port A bit 2 / external SRAM data 2 |
| Broche 74 | PA3 (AD3) — Port A bit 3 / external SRAM data 3 |
| Broche 75 | PA4 (AD4) — Port A bit 4 / external SRAM data 4 |
| Broche 76 | PA5 (AD5) — Port A bit 5 / external SRAM data 5 |
| Broche 77 | PA6 (AD6) — Port A bit 6 / external SRAM data 6 |
| Broche 78 | PA7 (AD7) — Port A bit 7 / external SRAM data 7 |
| Broche 79 | VCC — Digital supply voltage |
| Broche 80 | GND — Digital ground |
| Broche 81 | PF0 (A0) — Port F bit 0 / ADC input 0 |
| Broche 82 | PF1 (A1) — Port F bit 1 / ADC input 1 |
| Broche 83 | PF2 (A2) — Port F bit 2 / ADC input 2 |
| Broche 84 | PF3 (A3) — Port F bit 3 / ADC input 3 |
| Broche 85 | PF4 (A4/TCK) — Port F bit 4 / ADC4 / JTAG TCK |
| Broche 86 | PF5 (A5/TMS) — Port F bit 5 / ADC5 / JTAG TMS |
| Broche 87 | PF6 (A6/TDO) — Port F bit 6 / ADC6 / JTAG TDO |
| Broche 88 | PF7 (A7/TDI) — Port F bit 7 / ADC7 / JTAG TDI |
| Broche 89 | PK0 (ADC8/PCINT24) — Port K bit 0 / ADC8 / pin change int |
| Broche 90 | PK1 (ADC9/PCINT25) — Port K bit 1 / ADC9 / pin change int |
| Broche 91 | PK2 (ADC10/PCINT26) — Port K bit 2 / ADC10 / pin change int |
| Broche 92 | PK3 (ADC11/PCINT27) — Port K bit 3 / ADC11 / pin change int |
| Broche 93 | PK4 (ADC12/PCINT28) — Port K bit 4 / ADC12 / pin change int |
| Broche 94 | PK5 (ADC13/PCINT29) — Port K bit 5 / ADC13 / pin change int |
| Broche 95 | PK6 (ADC14/PCINT30) — Port K bit 6 / ADC14 / pin change int |
| Broche 96 | PK7 (ADC15/PCINT31) — Port K bit 7 / ADC15 / pin change int |
| Broche 97 | PG2 (ALE) — Port G bit 2 / external SRAM address latch enable |
| Broche 98 | AVCC — Analog supply voltage |
| Broche 99 | GND — Analog ground |
| Broche 100 | AREF — ADC reference voltage |
Applications typiques
ATMEGA2560V-8AU convient pour 6 applications: Arduino Mega 2560 Compatible Mainboard, 3D Printer Control Board, Industrial Automation Controller, Robotics Control Board, Multi-Channel Data Logger, Battery-Powered Measurement Instrument.
Arduino Mega 2560 Compatible Mainboard
The ATMEGA2560V-8AU is the original MCU on the Arduino Mega 2560 R3 platform, where its 256 KB Flash and 86 GPIO provide 54 digital I/O plus 16 analog inputs across four USARTs. The 1.8-5.5 V VCC range simplifies USB-bridge regulator design, while the 8 MHz V-grade clock keeps firmware timing loops predictable for shields using timer-based libraries. This part is the de facto standard for hobbyist and prosumer boards requiring large I/O counts without an external memory bus.
Recommandé
3D Printer Control Board
The ATMEGA2560V-8AU powers most open-source 3D-printer controllers (RAMPS, MKS GEN, Rambo) where its four USARTs drive multiple serial peripherals and its 16-channel 10-bit ADC reads thermistor inputs. The 256 KB Flash accommodates Marlin firmware with full feature sets including bed-leveling, auto-tune PID and graphic LCD menus, while 8 KB SRAM handles g-code parsing without overflow. The wide 1.8-5.5 V supply allows direct operation from 12 V buck-derived 5 V rails.
Recommandé
Industrial Automation Controller
The ATMEGA2560V-8AU is well suited for industrial PLC-style controllers where its 86 GPIO can directly drive relays, optocouplers and indicator LEDs without external I/O expanders. The four USARTs handle RS-232, RS-485 and Modbus links simultaneously, and the 16-channel ADC reads 4-20 mA loop signals through scaling resistors. Industrial -40C to +85C operation is guaranteed across the part's full VCC range, supporting both cabinet and field-mounted deployments.
Recommandé
Robotics Control Board
The ATMEGA2560V-8AU drives hobbyist and educational robotics platforms (robot arms, autonomous vehicles, humanoid kits) where its six timer/counters with PWM generate up to 12 PWM channels for servos and motor drivers. The 8 KB SRAM accommodates sensor-fusion buffers and PID loop histories, while the four USARTs connect to IMU, Bluetooth and radio modules concurrently. Field-updatable ISP flash enables on-bench firmware iteration without chip removal.
Recommandé
Multi-Channel Data Logger
The ATMEGA2560V-8AU is well suited to standalone data loggers capturing 16 analog inputs simultaneously, where its 16-channel 10-bit ADC runs at up to 15 kSPS at full resolution. The 4 KB EEPROM plus 256 KB Flash stores thousands of timestamped records, and four USARTs handle GPS, cellular modem, serial sensors and PC download ports in parallel. Wide VCC operation enables direct battery logging from solar or Li-ion sources without additional regulators.
Recommandé
Battery-Powered Measurement Instrument
The ATMEGA2560V-8AU suits portable field instruments that run directly from two alkaline cells or a Li-ion cell, leveraging its 1.8-5.5 V VCC range to skip boost regulators. The internal 8 MHz RC oscillator eliminates external crystals for low-accuracy applications, while ADC sampling on battery voltage enables fuel-gauge-style state-of-charge monitoring. ISP flash allows field firmware updates from a USB battery charger without disassembly.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA2560V-8AU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA2560V-8CU | ATMEGA2560-16AU | ATMEGA1280-16AU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-100 | CBGA-100 (not LQFP footprint-compatible) | TQFP-100 (same footprint) | TQFP-100 (same footprint) |
| Program Flash | 256 KB | 256 KB | 256 KB | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Maximum Clock | 8 MHz | 8 MHz | 16 MHz | 16 MHz |
| GPIO Count | 86 | 86 | 86 | 86 |
Principaux différenciateurs
- Widest 1.8 V to 5.5 V supply range in the ATmega2560 series (vs ATMEGA2560-16AU)
- Doubles program memory versus the ATmega1280 family (vs ATMEGA1280-16AU)
- TQFP-100 footprint shared across same-die V and non-V variants (vs ATMEGA2560V-8CU)
Notes de conception
Estimated: at VCC=5V and 8 MHz with all peripherals active the ATMEGA2560V-8AU draws roughly 15-20 mA; with sleep modes (Power-down) current drops below 10 uA. Decouple each VCC/GND pair with a 100 nF ceramic placed within 5 mm of the package pin. AVCC must be tied to VCC through a ferrite bead or small inductor and decoupled with a 100 nF plus a 10 uF bulk capacitor at the AREF pin.
Do not program the lock bits before verifying the bootloader address vector; locking the device without a working bootloader bricks the chip and requires high-voltage parallel programming to recover. The V-suffix grade clock caps at 8 MHz at 1.8 V to 5.5 V; selecting the 16 MHz internal RC above 2.7 V is unsupported and will yield undefined behavior. Always reconfigure JTAG pins as GPIO by clearing the JTD fuse bit before using PF4-PF7 as ADC inputs.
Estimated: at 5 V, 8 MHz and full GPIO toggling the device dissipates roughly 100 mW, well within the TQFP-100 thermal rating of about 50 C/W junction-to-ambient. The die junction temperature remains below 50 C in still air; no heatsink is required. Industrial temperature operation (-40 C to +85 C) is guaranteed across the full 1.8-5.5 V VCC range without derating.
Route the crystal traces (XTAL1, XTAL2) short and symmetric with a ground guard ring to avoid EMI pickup on the low-amplitude oscillator waveform. Keep ADC traces (PORTA, AREF) away from switching digital lines to minimize crosstalk into the 10-bit conversion. Place the ISP 6-pin header near the MCU with all signals in a straight line for in-system firmware updates without removing the chip from the board.
Informations de conformité
RoHS compliant per Microchip product page; the -8AU suffix indicates lead-free matte-tin plating. Industrial -40C to +85C grade; not AEC-Q100 qualified (automotive customers should contact Microchip for ATmega2560 automotive variants).
