ATMEGA644PV-10MU - 8-bit AVR MCU 64KB Flash 10MHz | Microchip
料号： ATMEGA644PV-10MU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.18 | $7.18 |
| 10 | $6.52 | $65.20 |
| 100 | $5.9 | $590.00 |
| 500 | $5.34 | $2,670.00 |
| 1,000 | $4.88 | $4,880.00 |
ATMEGA644PV-10MU 概述
An 8-bit AVR microcontroller is a single-chip computer built around the AVR enhanced RISC architecture, in which most instructions execute in a single clock cycle. Within the semiconductor hierarchy, it belongs to the microcontroller (MCU) family under embedded processors, integrating CPU, program Flash, data SRAM, EEPROM and peripherals such as timers, USARTs and ADC on one die, eliminating external memory chips in typical embedded control designs.
Key features include 64KB (32K x 16) self-programmable Flash with read-while-write support, 32 general purpose I/O lines, three flexible timers/counters with compare modes and PWM channels, two USARTs for serial communication, a byte-oriented 2-wire serial interface (TWI/I2C), an SPI serial port, and a 10-bit ADC. The picoPower (V) variant emphasizes low active and sleep current for battery-powered designs.
The AVR core uses a Harvard architecture with 32 general purpose working registers directly connected to the ALU, allowing one-cycle execution of most instructions and delivering up to 10 MIPS throughput at the 10 MHz maximum clock. In-System Programming and self-programming support field firmware updates without removing the device from the PCB.
Typical applications include industrial automation nodes, embedded sensor controllers, battery-powered instruments, and communication modules where the 1.8V-capable supply range, 10-bit ADC and dual USARTs fit low-power measurement and control systems.
Design consideration: the picoPower ATmega644PV runs at reduced maximum frequency versus the 20 MHz ATmega644P; verify your clock plan and use the internal calibrated RC oscillator or an external crystal within the 10 MHz limit.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA644PV-10MU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA644PV-10MU （相同外形与封装尺寸） ——差异在于 EEPROM, RoHS Status, SRAM, Package, Supply Voltage Range.
快速对比工具——选择替代料号进行并排对比：
ATMEGA644P-20MQ
✅ 直接替换✓ 有现货
$2.48 / 个
查看数据手册 →ATMEGA644PA-MUR
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA644-20MU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA644V-10MU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA1284P-MU
✅ 直接替换✓ 有现货
$4.1 / 个
查看数据手册 →ATMEGA644PV-10MU 最大额定值与电气特性
| Core Architecture | 8-bit AVR RISC |
| Flash Memory | 64 KB (32K x 16) ISP Flash |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| 最大时钟频率 | 10 MHz |
| 电源电压 | 1.8 V (picoPower family low-voltage capable) |
| General Purpose I/O | 32 lines |
| ADC Resolution | 10 bit |
| Timers/Counters | 3 (with compare modes and PWM) |
| USART Interfaces | 2 |
| Serial Interfaces | 2-wire (I2C/TWI), SPI |
| 封装 | 44-VQFN (7x7 mm), exposed pad |
| 工作温度 | -40C to +85C (industrial) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (green package) |
| In-System Programming | Yes (read-while-write) |
ATMEGA644PV-10MU 44-vqfn (7x7 mm), exposed pad 引脚配置指南
ATMEGA644PV-10MU（44-vqfn (7x7 mm), exposed pad 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA644PV-10MU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA644PV-10MU 适用于 6 应用s: Industrial Automation Nodes, Battery-Powered Sensor Instruments, Embedded Communication Modules, Motor and PWM Control Systems, Home Automation and IoT Nodes, Test and Measurement Equipment.
Industrial Automation Nodes
The ATMEGA644PV-10MU fits industrial control nodes because its 32 GPIO lines, three timers with PWM, and -40C to +85C industrial temperature range cover typical actuator and relay-driving requirements. Dual USARTs allow simultaneous communication with a supervisory PLC or SCADA link and a local RS-485/Modbus bus, while the TWI (I2C) and SPI interfaces connect real-time clocks, EEPROM and sensor front-ends. The 64KB self-programmable Flash supports field firmware updates over the serial link, and the industrial-grade green package withstands factory-floor thermal profiles. Typical circuit role: main MCU running control loops at up to 10 MIPS, with watchdog supervision for fail-safe recovery in unattended equipment.
推荐
Battery-Powered Sensor Instruments
As a picoPower device, the ATMEGA644PV-10MU is designed for battery-powered instrumentation: its low-voltage operation down to 1.8V, sleep modes, and low active current extend battery life in portable data loggers and handheld meters. The 10-bit ADC digitizes sensor outputs directly, the async timer supports wake-up from power-save mode on a 32 kHz crystal, and 4KB SRAM buffers measurement records between radio or USART uploads. In these designs the MCU spends most time in power-down, waking on timer or external interrupt to sample, average, and transmit. The 44-VQFN 7x7 mm footprint keeps board area small, and 64KB Flash stores calibration tables and multi-protocol communication stacks without external memory.
推荐
Embedded Communication Modules
With two independent USARTs plus SPI and TWI, the ATMEGA644PV-10MU serves as a protocol-conversion controller in embedded communication modules, bridging RS-232/RS-485 field buses to SPI-connected RF transceivers or TWI-connected peripherals. The read-while-write Flash enables bootloaders that update firmware over the communication channel itself, eliminating physical re-programming in deployed nodes. The 64KB program space accommodates protocol stacks such as Modbus plus telemetry framing simultaneously. Circuit role: master MCU managing packet framing, CRC checking, and store-and-forward buffering in the 4KB SRAM. Designers should verify USART baud-rate accuracy from the chosen crystal and enable the USART frame-error detection for noisy industrial links.
推荐
Motor and PWM Control Systems
The three timers/counters of the ATMEGA644PV-10MU provide compare-match PWM outputs suitable for driving DC motor H-bridges, servo channels, or LED dimmers, making it a cost-effective motion and power control MCU. At 10 MHz the AVR core delivers up to 10 MIPS, enough for closed-loop control using ADC feedback from current shunts or encoders read via GPIO interrupts. The 64KB Flash holds PID tuning tables and safety state machines, while the watchdog timer enforces fail-safe shutdown on software faults. PWM frequency should be chosen to balance inductor/audible-noise constraints against resolution at the 10 MHz system clock. The exposed-pad VQFN provides good ground integrity for switching-noise immunity.
推荐
Home Automation and IoT Nodes
For smart-home and IoT end nodes, the ATMEGA644PV-10MU combines enough memory for sensor fusion and communication stacks with the low power profile required for mains-free operation. Its 10-bit ADC reads temperature, humidity and light sensors; the TWI bus attaches RTCs and environmental sensors; and an SPI-connected radio module provides wireless connectivity. Sleep-mode current dominates overall battery budget, so designs leverage power-down mode with pin-change or timer wake-ups, sampling at intervals and sleeping between transmissions. The 2KB EEPROM stores network addresses and calibration constants across power cycles. The green RoHS-compliant VQFN-44 package supports consumer-grade lead-free assembly for high-volume smart-home production.
推荐
Test and Measurement Equipment
In low-cost test and measurement instruments, the ATMEGA644PV-10MU acts as the system controller handling front-panel interfaces, calibration data management, and measurement sequencing. The 10-bit ADC provides coarse acquisition while an external precision ADC on SPI handles high-resolution measurements, with the AVR performing averaging, range scaling, and display driving. 64KB Flash accommodates multi-language menus and compensation tables, and 2KB EEPROM retains calibration constants through power loss. The two USARTs enable PC connectivity for data logging and automated test scripts. Designers should shield analog front-ends from the digital ground using the exposed-pad VQFN grounding, and sample during idle periods to minimize digital switching noise coupling into measurements.
推荐
推荐产品汇总
工程参考数据： ATMEGA644PV-10MU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA644P-20MQ | ATMEGA644PA-MUR | ATMEGA644-20MU | ATMEGA1284P-MU |
|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) exposed pad | 44-VQFN exposed pad - same | 44-VQFN exposed pad - same | 44-QFN exposed pad - same | 44-VQFN exposed pad - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 16 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB |
| picoPower / Low-Voltage | Yes (V variant, 1.8V capable) | No (standard P) | Yes (PA, 2.5V/3.3V/5V) | No | Yes (picoPower) |
关键差异点
- picoPower low-voltage operation （对比 ATMEGA644P-20MQ)
- Cost-optimized memory point （对比 ATMEGA1284P-MU)
- Newer core revision （对比 ATMEGA644V-10MU)
设计说明
Estimated: choose the supply voltage against your speed grade. The picoPower PV part is specified for low-voltage operation down to 1.8V, but maximum guaranteed frequency derates with supply voltage per the AVR speed-grade curves in the manufacturer datasheet; running 10 MHz near 1.8V is at the family limit. For mixed 3.3V/5V systems, keep all VCC pins at the same potential and decouple each VCC/GND pair with 100 nF ceramics placed within 3 mm of the pins, plus one 4.7-10 uF bulk capacitor near the exposed pad.
Solder the 44-VQFN exposed pad to a grounded thermal land with an array of thermal vias (approximately 4x4, 0.3 mm drill) connecting to internal ground planes. The exposed pad is the primary ground return for the AVR core and ADC; an unsoldered pad causes erratic resets and degraded ADC accuracy. Follow the Microchip AVR hardware design application notes for QFN escape routing: 0.2-0.25 mm trace widths allow dog-bone escapes on 0.5 mm pitch without via-in-pad.
Verify fuse settings before first programming: the PV part is limited to 10 MHz, so selecting a 16 MHz crystal fuse configuration (valid on 20 MHz grades) runs the device out of specification and can cause instability. Also, the RESET pin can be repurposed as GPIO via fuse - doing so disables ISP reprogramming and requires a high-voltage parallel programmer for recovery. Leave a 6-pin ISP header on production boards for field updates, since the Flash supports read-while-write bootloader operation.
合规信息
FindIC data describes the part as GREEN (RoHS-compliant, lead-free package). REACH and conflict minerals statuses not stated in provided data - request Microchip compliance certificate.