ATMEGA1280V-8CUR - 8MHz AVR MCU 128KB Flash CBGA-100 | Microchip
MPN： ATMEGA1280V-8CUR ✓ 啟用中ATMEGA1280V-8CUR 概覽
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single die, sitting at the top of the embedded-control hierarchy (MCU -> microcontroller -> integrated circuit -> semiconductor). The AVR architecture executes most of its 133 powerful instructions in a single clock cycle, with 32 general-purpose working registers directly connected to the ALU, achieving throughputs close to 1 MIPS per MHz.
Key features include in-system programmable (ISP) flash, four flexible timer/counters with output-compare modulator, four programmable serial USARTs, master/slave SPI, byte-oriented 2-wire (I2C) interface, an EBI/EMI external bus interface, a programmable watchdog timer with separate on-chip oscillator, on-chip analog comparator, and interrupt and wake-up on pin change. An 8/16-channel, 10-bit ADC supports analog sensing with up to 86 general-purpose I/O lines.
Architecturally, the ATMEGA1280V belongs to the ATmega640/1280/2560 family, sharing a common die and peripheral set with different flash sizes. The AVR Harvard architecture separates program and data buses for deterministic single-cycle execution, and the JTAG/on-chip debug capability simplifies firmware development.
Typical applications include industrial automation controllers, battery-powered portable instruments (the low-voltage V grade supports energy-sensitive designs), building control, and sensor hubs that need many UARTs or abundant GPIO.
Design consideration: at 8 MHz maximum frequency, this V-grade part trades speed for low-voltage operation; verify the supply-voltage-versus-frequency safe operating region before selecting a 5V rail.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA1280V-8CUR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA1280V-8CUR （相同外形與佔位） — 差異在於 Package, ADC Channels, Program Memory Size, Program Memory Type, Timers.
ATMEGA2560V-8CUR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA640V-8CUR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA1280V-8AUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA1280V-8CUR 最大額定值與電氣特性
| Core | AVR 8-bit RISC |
| Max Clock Speed | 8 MHz |
| Flash Memory | 128 KB (64K x 16), ISP |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| 供應電壓 | 2.7 V to 5.5 V |
| I/O Lines | 86 general purpose I/O |
| ADC | 8/16-channel, 10-bit |
| USART | 4 programmable serial USART |
| SPI | Master/Slave SPI serial interface |
| TWI (I2C) | Byte-oriented 2-wire serial interface |
| External Bus Interface | EBI/EMI |
| Timers | Four timer/counters with output compare modulator |
| Watchdog Timer | Programmable, separate on-chip oscillator |
| Analog Comparator | On-chip |
| 工作溫度 | -40C to +85C (industrial) |
| 封裝 | 100-CBGA, 9 x 9 mm |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| RoHS 狀態 | Compliant (GREEN) |
| Lifecycle Stage | Active |
ATMEGA1280V-8CUR 100-cbga, 9 x 9 mm 腳位配置指南
ATMEGA1280V-8CUR（100-cbga, 9 x 9 mm 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA1280V-8CUR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA1280V-8CUR 適用於 6 應用s: Industrial Automation Controllers, Battery-Powered Portable Instruments, Building Control and HVAC Panels, Sensor Hubs and Data Loggers, Robotics and Motion Control Boards, Legacy Arduino Mega-Compatible Prototyping.
Industrial Automation Controllers
The ATMEGA1280V-8CUR fits industrial automation nodes that need many serial links and I/O: four USARTs drive Modbus RTU slaves or multi-drop RS-485 networks, while 86 GPIO lines interface relays, limit switches, and status LEDs without port expanders. The EBI/EMI external bus allows memory-mapped expansion for display or FPGA-adjacent tasks. The 10-bit ADC reads 4-20 mA-derived sensor voltages with external conditioning. The 8 MHz ceiling is ample for sequential control logic; the industrial -40C to +85C rating suits factory-floor cabinets. Place TVS protection on field-facing lines and isolate RS-485 transceivers to survive noisy installations.
推薦
Battery-Powered Portable Instruments
The V-grade low-voltage characteristic and AVR single-cycle-per-instruction efficiency make this MCU well suited to battery instruments that sleep most of the time. Pin-change interrupt wake-up and the separate-oscillator watchdog allow deep low-duty-cycle operation; running the core well below 8 MHz at a reduced supply cuts dynamic power roughly linearly with clock. The 4 KB EEPROM stores calibration constants without external nonvolatile memory, and the 10-bit, 16-channel ADC digitizes multiple sensor inputs. Designers should confirm the voltage-versus-frequency curve in the official datasheet and use the datasheet power-management sleep modes for the lowest standby current.
推薦
Building Control and HVAC Panels
Building controllers benefit from the ATmega1280V's combination of multiple UARTs, abundant I/O, and 10-bit ADC: one USART can run BACnet-adjacent or Modbus field buses, another a service port, while dozens of GPIO drive dampers, valves, and zone relays through driver transistors. The watchdog timer provides the fault recovery required in unattended installations, and the on-chip EEPROM holds configuration and setpoints through power loss. The industrial temperature range covers rooftop and mechanical-room environments. Use optocoupled or relay-isolated outputs for line-voltage loads and RC-filter ADC inputs for NTC temperature sensing accuracy.
推薦
Sensor Hubs and Data Loggers
As a sensor hub, the ATMEGA1280V-8CUR aggregates SPI and I2C sensors on its dedicated hardware buses while the 16-channel 10-bit ADC captures analog signals, logging to flash or an SD card over SPI. The 8 KB SRAM buffers acquisition bursts, and four USARTs stream data to radios or cellular modems. The EBI/EMI interface can attach parallel SRAM or memory-mapped peripherals when buffering demands exceed internal RAM. The AVR core's deterministic timing makes sampling loops easy to schedule with timer interrupts. Designers should budget SRAM carefully, since 8 KB must hold stack, buffers, and library state simultaneously.
推薦
Robotics and Motion Control Boards
Robot main and servo controller boards use the ATmega1280V's four timer/counters with output-compare modulator to generate multiple simultaneous PWM channels for motor drivers and servos, while quadrature encoder inputs use pin-change interrupts. Four USARTs connect telemetry, motor controllers, and host links; 86 GPIO handles limit switches and indicator arrays. The 8 MHz clock is sufficient for kinematic loops at modest rates, and the industrial temperature range suits uncooled enclosures. Pair with gate or motor driver ICs on the PWM outputs, keep analog sensing traces away from PWM switching edges, and use the JTAG port for on-chip debugging during development.
推薦
Legacy Arduino Mega-Compatible Prototyping
The ATmega1280 powers the original Arduino Mega, so this CBGA variant can be designed into Mega-compatible boards and programmed with the Arduino IDE, bootloader, and the MegaCore hardware package, which supports the ATmega640/1280/2560 family directly. Standard AVRISP mkII or USBasp programmers flash the ISP interface, and JTAG enables source-level debugging unavailable on smaller AVRs. Prototyping with Arduino libraries dramatically shortens firmware bring-up for sensing and control projects. Note this CBGA-100 part requires BGA assembly capability; prototype runs typically use the TQFP-100 ATMEGA1280V-8AU and move to CBGA for production.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA1280V-8CUR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA2560V-8CUR | ATMEGA640V-8CUR | ATMEGA1280V-8AUR |
|---|---|---|---|---|
| Package | 100-CBGA (9x9 mm) | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | TQFP-100 - different footprint |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| Max Clock Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| I/O Lines | 86 | 86 | 86 | 86 |
| ADC | 10-bit, 16-channel | 10-bit, 16-channel | 10-bit, 16-channel | 10-bit, 16-channel |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Drop-in on Same PCB Footprint | - | Yes | Yes | No (TQFP footprint) |
主要差異化特點
- Balanced 128 KB flash size (對比ATMEGA2560V-8CUR)
- Flash headroom option without respin (對比ATMEGA640V-8CUR)
- Low-voltage V-grade operation (對比ATMEGA1280-16AUR)
設計說明
Verify the supply-voltage-versus-frequency safe operating region before fixing the power rail. The V-grade family supports low-voltage operation, but the maximum 8 MHz rating must be validated against the operating voltage in the official ATmega640/1280/2560 datasheet tables. Decouple each VDD/VCC ball with 100 nF ceramics placed close to the CBGA vias, plus bulk 10 uF per rail. Estimated: total core I/O dynamic current scales roughly linearly with clock, so dropping from 8 MHz to 4 MHz approximately halves dynamic power for battery designs.
The 100-ball CBGA (9x9 mm) requires appropriate BGA land-pattern design per the Microchip package drawing, with via-in-pad or dog-bone escape routing on 0.8 mm-class ball grids (verify exact ball pitch in the package drawing). Plan fanout before layout: with 86 GPIO plus power and JTAG balls, a minimum of 4 signal layers is recommended. Provide a solid ground plane under the die area for signal return and thermal relief, and keep ADC analog balls grouped on a quiet region with a local analog ground island.
Do not confuse package suffixes: 'UR' is tape-and-reel CBGA, 'AU' is TQFP-100 - they are not footprint-compatible. Firmware written for the 5V ATmega1280-16AU must be re-checked for the 8 MHz maximum clock of the 8CUR grade; code assuming 16 MHz F_CPU will time out all delay-based protocols. Confirm the supply voltage range from the official datasheet for your temperature corner rather than third-party summaries, and program fuse bits (clock source, BOD) before deploying, since factory defaults run on the internal RC oscillator.
合規資訊
FindIC listing marks the part as GREEN/RoHS compliant; Microchip AVR products are standard lead-free. REACH, halogen-free, and conflict-minerals declarations should be obtained from official Microchip environmental documentation.
