ATMEGA640V-8CUR - 8MHz AVR 64KB MCU 100-CBGA | Microchip
部品番号: ATMEGA640V-8CUR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.75 | $4.75 |
| 10 | $4.45 | $44.50 |
| 100 | $4.3 | $430.00 |
| 500 | $4.15 | $2,075.00 |
| 1,000 | $4.02 | $4,020.00 |
ATMEGA640V-8CUR 概要
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single die, executing one instruction per clock cycle in the AVR RISC architecture. MCUs sit at the lowest level of the embedded system hierarchy - above discrete logic and below application processors - and are the workhorse of industrial control, instrumentation, and consumer electronics. The ATmega640 belongs to the megaAVR family, the large-pin-count branch of the AVR product line.
Key features include 64 KB of self-programmable ISP Flash, 86 general purpose I/O lines, 32 general purpose working registers, a real-time counter, six flexible timer/counters, and in-circuit serial programming (ICSP) via just two device I/O pins plus reset. The V-suffix device supports the extended low-voltage operating range (1.8 V minimum), enabling battery-powered and low-voltage industrial designs.
Architecturally, the AVR core executes most instructions in a single clock cycle through a Harvard-architecture pipeline with separate program and data buses, giving high code efficiency and deterministic timing. The device integrates JTAG-based on-chip debugging and supports the MPLAB Snap programmer through the 8-pin SIL ICSP connector.
Typical applications include industrial automation controllers, building management nodes, instrumentation front ends, and battery-operated monitoring systems where the wide 1.8 V to 5.5 V supply range and low-power sleep modes are decisive.
Design consideration: clock speed derates with supply voltage - 8 MHz is safe across the full 1.8 V to 5.5 V range, but verify the voltage-frequency curve if migrating to the 16 MHz ATMEGA640 variants.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-18.
ドロップイン代替品: ATMEGA640V-8CUR — 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: ATMEGA640V-8CUR （同一形状・フットプリント） — 相違点: Program Memory Size, Program Memory Type, Flash Memory, Package, Maximum Clock Frequency.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA640-16CUR
✅ ドロップイン✓ 在庫あり
$6.72 / 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 →ATMEGA1280-16CUR
✅ ドロップイン✓ 在庫あり
$6.25 / 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-8CUR 最大定格＆電気的特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 64 KB (32K x 16) |
| RAM Size | 8 KB |
| EEPROM Size | 4 KB |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 86 |
| General Purpose Working Registers | 32 |
| Timers/Counters | 6 flexible timer/counters |
| Real-Time Counter | Yes |
| 動作温度 | -40C to +85C (TA) |
| パッケージ | 100-CBGA (9x9 mm) |
| 実装タイプ | Surface Mount |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| データバス幅 | 8 Bit |
ATMEGA640V-8CUR 100-cbga (9x9 mm) ピン配置ガイド
ATMEGA640V-8CUR (100-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: ATMEGA640V-8CUR.
詳細は データシート をご参照ください。
主な用途
ATMEGA640V-8CUR の用途: 6 件s: Industrial Automation Controllers, Battery-Powered Monitoring Systems, Instrumentation and Test Equipment, Building Management and HVAC Control, Motor Control and Actuation, Legacy Board Redesign and BOM Continuity.
Industrial Automation Controllers
The ATMEGA640V-8CUR fits industrial automation nodes because its 86 general purpose I/O lines and six timer/counters can drive relays, stepper sequences, and encoder inputs without external port expanders, and the AVR single-cycle RISC core provides deterministic 8 MHz timing for control loops. In a PLC expansion module, the MCU typically handles digital I/O scanning and Modbus-style UART communication while a supervisor handles safety. The wide 1.8 V to 5.5 V supply range tolerates noisy industrial rails, and the -40C to +85C temperature rating covers cabinet environments. The trade-off versus a 16 MHz part is halved computation headroom, so reserve the 8 MHz V-grade for designs whose interrupt budget is verified below roughly 50% CPU load.
おすすめ
Battery-Powered Monitoring Systems
The 1.8 V to 5.5 V operating range is the decisive parameter for battery designs: the ATMEGA640V-8CUR runs directly from two NiMH/alkaline cells or a single-cell lithium rail without a boost converter, and AVR power-down sleep modes drop current to microamp levels while the real-time counter keeps timekeeping. A typical sensor logger uses the six timers for periodic sampling, the 4 KB EEPROM for calibration data, and the 8 KB SRAM for ring buffers between radio transmissions. Using the 8 MHz V-grade instead of a 16 MHz standard part reduces dynamic switching current across the whole discharge curve. The engineering trade-off is that at 1.8 V the MCU must remain clocked at or below 8 MHz, so heavy DSP-style processing is not feasible on this grade.
おすすめ
Instrumentation and Test Equipment
Bench instruments benefit from the ATmega640's combination of 64 KB self-programmable Flash for field-updatable firmware, 4 KB EEPROM for calibration constants, and JTAG on-chip debugging for deterministic bring-up. The 86 I/O lines interface front-panel keys, displays, and relay-switched signal paths, while hardware USARTs handle remote control protocols. In a data-acquisition front end, the MCU sequences an external ADC and streams results over UART or SPI; the 8 MHz clock limits sample-rate coordination but is ample for human-interface-class instruments. The CBGA-100 footprint gives a compact 9x9 mm replacement for older TQFP-based boards when re-spinning for area savings, and the V-grade's wide supply range simplifies dual-rail analog designs.
おすすめ
Building Management and HVAC Control
HVAC controllers use the ATMEGA640V-8CUR for fan staging, damper actuation, and temperature network integration, exploiting the 86 I/O lines to drive triacs and read NTC sensor dividers directly. The real-time counter plus a 32.768 kHz crystal supports time-of-use scheduling, and the 4 KB EEPROM holds setpoints and fault logs through power cycles. The -40C to +85C rating covers rooftop unit enclosures, and the 1.8 V minimum supply allows the same PCB to be reused across 3.3 V and 5 V product variants. Communication over TWI or USART links to room units keeps the BOM single-chip. The design consideration is watchdog supervision: the megaAVR watchdog timer must be enabled in field units to recover from EMI-induced lockups in motor-switching environments.
おすすめ
Motor Control and Actuation
With six flexible timer/counters, the ATmega640 generates multiple PWM channels with hardware phase/frequency control suitable for DC motor and stepper actuation, while quadrature encoder inputs are handled in interrupt-driven firmware at 8 MHz. The 86 GPIO lines drive H-bridge enable, direction, and current-sense multiplexing, and the CBGA-100 package places motor interface pins with short return paths to the ground ball array. The wide supply range lets the same controller serve 3.3 V logic and 5 V gate-driver domains. For brushed DC drives under 24 V, the single-chip approach replaces discrete logic and reduces EMI redesign cycles. The key constraint is CPU bandwidth: PWM plus commutation interrupts at 8 MHz must be profiled, and higher-speed motor control should migrate to the ATMEGA640-16CUR drop-in.
おすすめ
Legacy Board Redesign and BOM Continuity
Many legacy products specify the ATmega640 family in TQFP-100 or CBGA-100; the ATMEGA640V-8CUR serves as the low-voltage CBGA continuity part when the original speed grade was 8 MHz. Because the ATmega640/1280/2560 die shares one datasheet and one footprint across memory sizes, a single PCB can be populated with 64 KB, 128 KB, or 256 KB variants to serve multiple SKUs - a common sourcing hedge against allocation. Firmware written for earlier megaAVR parts ports with minimal changes, and the ICSP programming interface (two I/O pins plus reset, per Microchip documentation) is compatible with MPLAB Snap and third-party ISP programmers. Verifying the 9x9 mm CBGA land pattern against the datasheet mechanical drawing is the main re-spin task.
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: ATMEGA640V-8CUR — 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 | ATMEGA640-16CUR | ATMEGA640V-8CU | ATMEGA1280-16CUR | ATMEGA2560V-8CUR |
|---|---|---|---|---|---|
| Package | 100-CBGA (9x9 mm) | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 128 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Max Clock Speed | 8 MHz | 16 MHz | 8 MHz | 16 MHz | 8 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | approx 2.7 V to 5.5 V | 1.8 V to 5.5 V | approx 2.7 V to 5.5 V | 1.8 V to 5.5 V |
| General Purpose I/O | 86 | 86 | 86 | 86 | 86 |
主な差別化要因
- Lowest supply voltage in the CBGA-100 ATmega640 family （vs ATMEGA640-16CUR)
- Same-footprint Flash headroom upgrade path （vs ATMEGA2560V-8CUR)
- Cost-optimized 64 KB entry point （vs ATMEGA1280-16CUR)
設計ノート
Respect the AVR voltage-frequency derating curve: the ATMEGA640V-8CUR is guaranteed to 8 MHz across 1.8 V to 5.5 V, but this is also its ceiling. If the design later needs a crystal above 8 MHz, migrate to the ATMEGA640-16CUR and verify the minimum supply rises to roughly 2.7 V. Add 100 nF decoupling on each VCC/AVCC ball pair plus bulk 10 uF, and keep the analog supply filtered through an LC or ferrite bead when using the ADC.
CBGA-100 (9x9 mm) requires an accurate 1.0 mm-pitch ball land pattern taken directly from the datasheet mechanical drawing; do not scale from a TQFP-100 footprint. Because balls are hidden after reflow, plan AOI or X-ray inspection and use a solder-mask-defined pad per the drawing to control ball collapse. Fill unused area between ball fields with ground plane and stitch vias to reduce ground bounce on the 86 I/O lines during simultaneous switching.
The UR suffix denotes reel packing and the C suffix the CBGA temperature package - do not substitute TQFP variants (e.g., ATMEGA640V-8AU) on the same footprint; they are not pin-compatible. Enable the watchdog timer in production firmware, since the megaAVR has no brown-out-driven latch protection by default unless the BOD fuse is programmed. Fuse settings for clock source and JTAGEN are the most common cause of field programming failures - dump and archive fuses from a known-good board before reflowing replacements.
コンプライアンス情報
Compliance data not present in the provided web data; verify on the Microchip product page for the specific top marking and date code.
