ATMEGA1280V-8CU - 8-bit AVR MCU 128KB Flash 8MHz CBGA-100 | Microchip
部品番号: ATMEGA1280V-8CU ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $17.25 | $172.50 |
| 100 | $15.4 | $1,540.00 |
| 500 | $13.85 | $6,925.00 |
| 1,000 | $12.2 | $12,200.00 |
ATMEGA1280V-8CU 概要
An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most instructions in a single clock cycle, giving it deterministic timing for real-time control. Within the power-management hierarchy of embedded systems, the MCU sits at the heart of the control chain: it reads sensors through its ADC, executes firmware from Flash, and drives actuators through general-purpose I/O. The ATmega family (ATmega640/1280/2560) is the enlarged pin-compatible branch of the popular ATmega line, sharing the same core and toolchain as the smaller ATmega48/88/168/328 devices used on Arduino-class boards.
Key features include 86 general-purpose I/O lines, four USARTs, a master/slave SPI interface, a byte-oriented 2-wire serial interface (TWI/I2C), an 8/16-channel 10-bit ADC, six flexible timers with output-compare modulator, a programmable watchdog timer with separate on-chip oscillator, an on-chip analog comparator, and interrupt and wake-up on pin change. The advanced RISC core executes 133/135 powerful instructions, most in a single clock cycle.
Technically, the device pairs its AVR core with 32 general-purpose working registers, a real-time counter, JTAG boundary-scan and on-chip debug support, and in-system self-programmable Flash that allows field firmware updates. The CBGA ball-grid array improves board-level routing density versus QFP alternatives while offering shorter interconnects for signal integrity at 8 MHz operation.
Typical applications include industrial automation controllers, battery-powered instrumentation, building control and HVAC panels, and multi-channel sensor hubs that exploit the wide peripheral set and low supply range.
A key design consideration: the 8 MHz speed limit is bonded to the supply voltage; firmware ported from faster 16 MHz ATmega parts must be re-timed, and the CBGA package requires BGA-capable PCB assembly, so consider the TQFP siblings if in-house assembly lacks BGA reflow capability.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ATMEGA1280V-8CU — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATMEGA1280V-8CU （同一形状・フットプリント） — 相違点: Mounting Type, Package, Watchdog Timer, Flash Memory, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA1280-16CU
✅ ドロップイン✓ 在庫あり
$12.9 / 個
データシートを見る →ATMEGA2560V-8CUR
✅ ドロップイン✓ 在庫あり
$6.12 / 個
データシートを見る →ATMEGA640V-8CU
✅ ドロップイン✓ 在庫あり
$8.36 / 個
データシートを見る →ATMEGA1280V-8AUR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATMEGA1280-16AUR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATMEGA1280V-8CU 最大定格＆電気的特性
| Core | AVR 8-bit RISC |
| Clock Speed (max) | 8 MHz |
| Program Memory (Flash) | 128 KB (64K x 16) |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| Supply Voltage (Vcc) | 2.7 V to 5.5 V |
| General-Purpose I/O Lines | 86 |
| Working Registers | 32 |
| ADC | 10-bit, 8/16 channels |
| Timers | 6 flexible timers/counters |
| USART | 4 |
| SPI | 1 master/slave |
| TWI (I2C) | 1 byte-oriented |
| Analog Comparator | Yes (on-chip) |
| Watchdog Timer | Yes, with separate on-chip oscillator |
| パッケージ | 100-ball CBGA (9x9 mm) |
| 動作温度 | -40 C to +85 C (industrial) |
| Instruction Set | 133/135 powerful instructions, mostly single-cycle |
| In-System Programming | Yes (self-programmable Flash) |
| Debug Interface | JTAG / on-chip debug |
| 実装タイプ | Surface Mount (BGA) |
| RoHS ステータス | Compliant |
ATMEGA1280V-8CU 100-ball cbga (9x9 mm) ピン配置ガイド
ATMEGA1280V-8CU (100-ball cbga (9x9 mm) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATMEGA1280V-8CU.
詳細は データシート をご参照ください。
主な用途
ATMEGA1280V-8CU の用途: 6 件s: Industrial Automation Controllers, Battery-Powered Instrumentation, Building Control and HVAC Panels, Multi-Channel Sensor Hubs, 3D Printer and CNC Controller Boards, Home Automation and IoT Gateways.
Industrial Automation Controllers
The ATMEGA1280V-8CU fits industrial automation controllers because it pairs 86 GPIO lines with four USARTs and a TWI bus, allowing direct interface to multiple sensor front-ends and RS-485/RS-232 transceivers on a single MCU. Its 128 KB Flash accommodates full state-machine firmware plus Modbus or CANopen stacks, while the 2.7-5.5 V Vcc range tolerates loosely regulated 24 V industrial rails after a small buck supply. The 8 MHz core executes most AVR instructions in a single cycle, giving deterministic scan-loop timing for PLC-style ladder replacements.
おすすめ
Battery-Powered Instrumentation
The ATMEGA1280V-8CU is well matched to battery-powered instrumentation because its low-voltage V-grade operates down to 2.7 V, allowing continued operation from a single Li-ion cell near end-of-discharge. The AVR core's efficient single-cycle execution and small active current keep average power low when the MCU is mostly sleeping between ADC conversions. The 10-bit ADC with up to 16 channels digitizes multi-sensor inputs (temperature, pressure, flow) without external muxes, while 4 KB EEPROM stores calibration constants without battery-backed SRAM.
おすすめ
Building Control and HVAC Panels
HVAC and building-control panels benefit from the ATMEGA1280V-8CU's 86 GPIO and four USARTs, which can simultaneously drive character LCDs, scan keypads, communicate with variable-frequency drives, and log to external EEPROM or SD cards via SPI. The 128 KB Flash supports full BACnet or Modbus stack implementations with room for vendor-specific application code. Industrial -40 C to +85 C temperature rating covers unconditioned equipment-room environments, while the 2.7-5.5 V range allows operation from 5 V standby rails in PLC backplanes.
おすすめ
Multi-Channel Sensor Hubs
The ATMEGA1280V-8CU is a strong fit for multi-channel sensor hubs because it offers up to 16 ADC channels and 86 GPIO, which together let a single MCU aggregate temperature, humidity, occupancy, and analog sensor inputs in one design. The four USARTs support concurrent wired links to upstream gateways, while SPI and TWI connect to digital sensors and EEPROM/FRAM storage. The 8 KB SRAM is generous for ATmega-class buffering of sensor bursts before forwarding over the network.
おすすめ
3D Printer and CNC Controller Boards
The ATMEGA1280V-8CU is widely used as the main controller in 3D printer and CNC boards because its 86 GPIO and six timers can simultaneously drive stepper drivers, read end-stops, command character or graphical LCDs, and communicate over USB via the on-chip USB controller. 128 KB Flash is enough for Marlin/Repetier-style firmwares with multiple extruders and heated-bed profiles, while the AVR core's deterministic timing helps maintain smooth motion planning at 8 MHz. Designers upgrading from smaller ATmega boards keep the same AVR toolchain and library ecosystem.
おすすめ
Home Automation and IoT Gateways
The ATMEGA1280V-8CU serves as an IoT gateway MCU because it can host both a Wi-Fi/Ethernet module over SPI or UART and a sub-GHz radio over USART, while still driving local relays, buttons, and LCDs from the remaining GPIO. Its 128 KB Flash stores gateway application code, OTA bootloader, and protocol stacks (MQTT, HTTP) simultaneously. The 2.7-5.5 V Vcc range is compatible with USB-powered 5 V designs as well as battery-backed 3.3 V systems, easing power-tree design.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATMEGA1280V-8CU — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATMEGA1280-16CU | ATMEGA2560V-8CU | ATMEGA640V-8CU |
|---|---|---|---|---|
| Package | 100-ball CBGA (9x9 mm) | 100-ball CBGA (9x9 mm) - same | 100-ball CBGA (9x9 mm) - same | 100-ball CBGA (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 8 MHz | 16 MHz | 8 MHz | 8 MHz |
| Supply Voltage (Vcc) | 2.7 V to 5.5 V (V-grade) | 4.5 V to 5.5 V | 2.7 V to 5.5 V (V-grade) | 2.7 V to 5.5 V (V-grade) |
| Flash Memory | 128 KB | 128 KB | 256 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| GPIO Count | 86 | 86 | 86 | 86 |
| Unit Price (qty 1, USD, approx) | 18.50 | 20.00 | 22.00 | 16.00 |
主な差別化要因
- Lowest Vcc in the ATmega1280 family （vs ATMEGA1280-16CU)
- Same package as ATmega2560 for 2x Flash upgrade （vs ATMEGA2560V-8CU)
- Same peripheral set as the smaller ATmega640 （vs ATMEGA640V-8CU)
設計ノート
The 100-ball CBGA package requires PCB assembly with BGA-capable reflow and X-ray or side-view inspection. Estimated ball pitch is 1.0 mm; design rules should set pad diameter to roughly 0.5 mm with non-solder-mask-defined (NSMD) pads for best joint reliability. If your contract manufacturer cannot handle BGA, route to the TQFP-100 ATmega1280 siblings (e.g. ATMEGA1280-16AU) instead - firmware is portable across packages since the same AVR die is used.
Place a 100 nF decoupling capacitor as close as possible to each Vcc/AVcc pin pair, plus a single 10 uF bulk capacitor near the package. The ATmega1280 has separate AVcc/AGND rails for the ADC; if ADC accuracy below 1 LSB matters, route AVcc through a small ferrite bead from digital Vcc and add a 10 nF + 100 nF cap pair on AVcc. Brown-out detection should be enabled (BOD level set per the lowest operating Vcc) to avoid Flash corruption on slow power-down ramps.
Estimated: at 8 MHz, active current for the ATmega1280 is roughly 8-10 mA, but I/O sourcing more than 20 mA per pin or 200 mA total across Vcc/GND pins will violate the absolute-maximum ratings - always buffer high-current loads with transistors or driver ICs. Watch out for fuse-bit misconfiguration: programming the clock-source fuse to an external clock without a clock present will lock the part out of ISP; keep a high-voltage programmer (e.g. STK500/AVR Dragon) on hand for recovery.
Keep the 16 MHz crystal (or ceramic resonator) traces short and symmetric, with the load capacitors placed within a few millimeters of the XTAL1/XTAL2 pins. The CBGA ground balls should be tied to a continuous ground plane on the top layer with multiple stitching vias to the inner ground plane to keep the digital return paths short. JTAG signals (TCK, TMS, TDI, TDO) should be length-matched within roughly 50 mm if JTAG daisy-chaining other devices on the board is planned.
コンプライアンス情報
RoHS compliant per Microchip product page. Not AEC-Q100 qualified (industrial-grade part, not automotive).
