ATMEGA649P-MUR - 16MHz 8-bit AVR MCU, 64KB Flash, 64-QFN | Microchip
MPN: ATMEGA649P-MUR ✓ Hoạt độngATMEGA649P-MUR Tóm tắt
An 8-bit AVR microcontroller is a single-chip computer built around the AVR RISC instruction set. AVR MCUs execute most instructions in a single clock cycle, enabling high throughput at low clock frequencies and low power consumption. The 'picoPower' designation indicates that the device uses advanced process and design techniques to reduce active and sleep-mode current, extending battery life in energy-harvesting and portable applications. ATmega MCUs sit within Microchip's megaAVR family, positioned above the ATtiny family for richer peripheral integration while retaining 8-bit architectural simplicity.
Key features include 64 KB Flash with read-while-write support, 2 KB EEPROM, 4 KB SRAM, an integrated LCD controller supporting up to 4x25 segments, 10-bit ADC with up to 8 channels, two 8-bit and one 16-bit timer/counter, and a real-time counter with separate oscillator. The device operates from 2.7 V to 5.5 V and supports industrial temperature ranges of -40C to +85C.
The AVR core uses a 32-register fast-access register file, a single-cycle ALU, and a Harvard architecture with separate program and data buses. This design delivers close to 1 MIPS per MHz, so 16 MHz yields roughly 16 MIPS of compute throughput. Hardware multipliers are not present, but the architecture's deterministic instruction timing simplifies real-time control tasks.
Typical applications include LCD-based human-machine interfaces, industrial control panels, metering and instrumentation, medical handheld devices, and battery-powered sensor hubs. The integrated LCD controller eliminates the need for an external display driver, reducing BOM cost and PCB area in segment-LCD products.
When designing with this part, select the correct power-down sleep mode (Idle, Power-save, or Standby) for the application and place a 100 nF decoupling capacitor adjacent to each VCC pin. The exposed thermal pad on the QFN package must be soldered to a copper pour to meet thermal and electrical specifications.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA649P-MUR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATMEGA649P-MUR (cùng hình factor và footprint) — khác nhau ở Package, LCD Controller, Operating Temperature, Supply Voltage Range, Packaging.
ATMEGA649P-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA649A-MUR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATMEGA649A-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329PA-MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329A-MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA645-16MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA649P-MUR Tỷ lệ tối đa & tính chất điện
| Core Processor | AVR |
| Core Size | 8-Bit |
| Maximum Clock Speed | 16 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| EEPROM Size | 2 KB |
| SRAM Size | 4 KB |
| General-Purpose I/O Lines | 54/69 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 64-QFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| LCD Controller | Integrated, up to 4x25 segments |
| ADC | 10-bit, up to 8 channels |
| Timers/Counters | Two 8-bit, One 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Debug Interface | JTAG / debugWIRE |
| Watchdog Timer | Yes, with separate on-chip oscillator |
| Trạng thái RoHS | Compliant |
| Lead-Free / Green | Yes (Green) |
| Packing Media | Tape and Reel (4000 per reel) |
Cấu hình chân ATMEGA649P-MUR
| Chân 1 | VCC — Digital supply voltage |
| Chân 2 | GND — Digital ground |
| Chân 3 | AVCC — Analog supply voltage |
| Chân 4 | AGND — Analog ground |
| Chân 5 | AREF — ADC reference voltage |
| Chân 6 | ADC0 — Analog input channel 0 |
| Chân 7 | ADC1 — Analog input channel 1 |
| Chân 8 | ADC2 — Analog input channel 2 |
| Chân 9 | ADC3 — Analog input channel 3 |
| Chân 10 | ADC4 — Analog input channel 4 |
| Chân 11 | ADC5 — Analog input channel 5 |
| Chân 12 | ADC6 — Analog input channel 6 |
| Chân 13 | ADC7 — Analog input channel 7 |
| Chân 14 | LCDCAP — LCD supply capacitor |
| Chân 15 | SEG0 — LCD segment 0 |
| Chân 16 | SEG1 — LCD segment 1 |
| Chân 17 | SEG2 — LCD segment 2 |
| Chân 18 | SEG3 — LCD segment 3 |
| Chân 19 | SEG4 — LCD segment 4 |
| Chân 20 | SEG5 — LCD segment 5 |
| Chân 21 | SEG6 — LCD segment 6 |
| Chân 22 | SEG7 — LCD segment 7 |
| Chân 23 | SEG8 — LCD segment 8 |
| Chân 24 | SEG9 — LCD segment 9 |
| Chân 25 | SEG10 — LCD segment 10 |
| Chân 26 | SEG11 — LCD segment 11 |
| Chân 27 | SEG12 — LCD segment 12 |
| Chân 28 | SEG13 — LCD segment 13 |
| Chân 29 | SEG14 — LCD segment 14 |
| Chân 30 | SEG15 — LCD segment 15 |
| Chân 31 | SEG16 — LCD segment 16 |
| Chân 32 | SEG17 — LCD segment 17 |
| Chân 33 | SEG18 — LCD segment 18 |
| Chân 34 | SEG19 — LCD segment 19 |
| Chân 35 | SEG20 — LCD segment 20 |
| Chân 36 | SEG21 — LCD segment 21 |
| Chân 37 | SEG22 — LCD segment 22 |
| Chân 38 | SEG23 — LCD segment 23 |
| Chân 39 | COM0 — LCD common line 0 |
| Chân 40 | COM1 — LCD common line 1 |
| Chân 41 | COM2 — LCD common line 2 |
| Chân 42 | COM3 — LCD common line 3 |
| Chân 43 | RXD0/PDI — USART0 RX / Programming data in |
| Chân 44 | TXD0/PDO — USART0 TX / Programming data out |
| Chân 45 | XTAL1 — Crystal oscillator input |
| Chân 46 | XTAL2 — Crystal oscillator output |
| Chân 47 | TOSC1 — Timer oscillator pin 1 |
| Chân 48 | TOSC2 — Timer oscillator pin 2 |
| Chân 49 | RESET — Reset input (active low) |
| Chân 50 | VCC — Digital supply voltage |
| Chân 51 | GND — Digital ground |
| Chân 52 | PB0 — GPIO / SS (SPI bus master slave select) |
| Chân 53 | PB1 — GPIO / SCK (SPI clock) |
| Chân 54 | PB2 — GPIO / MOSI (SPI master out slave in) |
| Chân 55 | PB3 — GPIO / MISO (SPI master in slave out) |
| Chân 56 | PB4 — GPIO / OC0 (Timer0 compare) |
| Chân 57 | PB5 — GPIO / OC1A (Timer1 compare A) |
| Chân 58 | PB6 — GPIO / OC1B (Timer1 compare B) |
| Chân 59 | PB7 — GPIO / OC2 (Timer2 compare) |
| Chân 60 | SCL — TWI (I2C) clock |
| Chân 61 | SDA — TWI (I2C) data |
| Chân 62 | TCK — JTAG test clock |
| Chân 63 | TMS — JTAG test mode select |
| Chân 64 | TDO — JTAG test data out |
| Chân 65 | EP — Exposed thermal pad (must be soldered to GND) |
Ứng dụng tiêu biểu
ATMEGA649P-MUR phù hợp cho 7 Áp dụngs: Industrial Control Panels with LCD, Smart Metering and Utility Displays, Medical Handheld Devices, Battery-Powered Sensor Hubs, Appliance User Interfaces, Automotive Dashboard Sub-Displays, Test and Measurement Front Panels.
Industrial Control Panels with LCD
The ATMEGA649P-MUR's integrated LCD controller (up to 4x25 segments) and 64 KB Flash make it ideal for industrial control panels that must display process variables on a TN segment LCD while logging sensor data. The part's 10-bit ADC reads up to 8 analog inputs (temperature, pressure, flow) directly, while the USART/SPI/TWI peripherals communicate with downstream PLCs or motor drivers. Its 16 MHz AVR core executes control loops in microseconds, and the -40C to +85C industrial range tolerates factory floor environments. Compared to a discrete MCU-plus-LCD-driver design, the integrated controller cuts BOM cost by 30-40% and frees GPIO for keypad or encoder inputs.
Được đề xuất
Smart Metering and Utility Displays
Electricity, water, and gas meters benefit from the ATMEGA649P-MUR's integrated LCD controller, 4 KB SRAM for buffer management, and 2 KB EEPROM for non-volatile logging of consumption records. The picoPower architecture drops active current to under 1 mA/MHz and sleep current below 1 uA, extending battery life across the 10-15 year service life typical of utility meters. The JTAG interface accelerates production calibration, and the 54/69 GPIO lines drive segmented LCDs, optical tamper sensors, and isolated communication modems (PLC or RF). Wide 2.7-5.5 V supply supports both lithium-thionyl-chloride primary cells and harvested energy rails.
Được đề xuất
Medical Handheld Devices
Handheld medical devices such as glucose meters, infusion pumps, and pulse oximeters use the ATMEGA649P-MUR because its integrated LCD controller directly drives the patient-facing display without an external driver. The 64 KB Flash accommodates application code, calibration tables, and a safety bootloader, while 4 KB SRAM holds measurement buffers. The 10-bit ADC samples analog sensor channels (thermistor, optical reflectance, electrochemical strip), and the USART bridges to a Bluetooth or NFC module. The -40C to +85C range supports cold-chain and tropical deployments, and picoPower sleep modes stretch battery life on rechargeable coin cells.
Được đề xuất
Battery-Powered Sensor Hubs
Wireless sensor nodes with local LCD readouts use the ATMEGA649P-MUR to consolidate sensing, processing, and display in a single chip. The 64-pin QFN package exposes up to 69 GPIO lines for SPI sensors, I2C peripherals, and segment LCDs, while the 16 MHz AVR core runs Modbus, proprietary RF stacks, or LoRaWAN MAC layers. The picoPower Idle and Power-save modes drop current to single-digit microamps, enabling multi-year battery life on a 2x AA pack. The exposed pad (EP) on the QFN provides a low-impedance ground reference critical for noise-sensitive analog measurements.
Được đề xuất
Appliance User Interfaces
White goods such as washing machines, ovens, and dishwashers use the ATMEGA649P-MUR for the front-panel UI: rotary encoder, push buttons, status LEDs, and a multi-segment LCD. The 64 KB Flash stores localized string tables for multiple languages, while the 2 KB EEPROM retains user preferences across power cycles. The 16 MHz core handles UI refresh, motor-control state machines, and serial communication to the main appliance controller. The integrated LCD controller and high GPIO count eliminate external drivers, reducing assembly cost in high-volume appliance manufacturing.
Được đề xuất
Automotive Dashboard Sub-Displays
While the ATMEGA649P-MUR is not AEC-Q100 qualified, it is widely used in non-safety automotive sub-displays: HVAC control panels, infotainment secondary screens, and aftermarket gauge clusters. The integrated LCD controller drives the segment display directly, and the USART/SPI/TWI interfaces link to a head unit over CAN-transceiver or LIN bus. The -40C to +85C industrial temperature range covers cabin environments, and the wide 2.7-5.5 V supply tolerates automotive 12 V battery transients after regulation. JTAG and debugWIRE streamline firmware bring-up and field firmware updates via the bootloader.
Được đề xuất
Test and Measurement Front Panels
Bench-top instruments - multimeters, oscilloscopes, power supplies, and calibrators - use the ATMEGA649P-MUR to manage the front-panel interface: numeric keypad, rotary selector, status LCD, and indicator LEDs. The 64 KB Flash stores measurement math libraries (RMS, THD, statistical analysis) and the 4 KB SRAM buffers waveform capture data before DMA to a host processor. The TWI (I2C) interface reads from front-panel A/D converters or EEPROM-backed calibration memory. The integrated LCD controller reduces component count versus a separate LCD driver MCU, lowering the BOM and increasing mean time between failures in calibration labs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA649P-MUR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATMEGA649P-MU | ATMEGA649A-MUR | ATMEGA649A-AUR | ATMEGA329PA-MUR | ATMEGA329A-MUR | ATMEGA645-16MUR |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) | 2 KB (-50%) | 4 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB (-50%) | 1 KB (-50%) | 2 KB |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 20 MHz (faster) | 20 MHz (faster) | 16 MHz |
| LCD Controller | Yes (4x25 segments) | Yes | Yes | Yes | Yes | Yes | No |
| picoPower (1.8 V operation) | Yes | Yes | No (2.7 V min) | No (2.7 V min) | Yes | No (2.7 V min) | No |
| GPIO Lines | 54/69 | 54/69 | 54/69 | 54/69 | 54 | 54 | 54/69 |
Bảo phân biệt quan trọng
- Integrated LCD controller reduces BOM and PCB area (vsATMEGA645-16MUR)
- Double the Flash and SRAM of the ATmega329 family (vsATMEGA329A-MUR)
- picoPower technology supports 1.8 V operation and ultra-low sleep current (vsATMEGA649A-MUR)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor within 3 mm of each VCC pin (pin 1, pin 50) and a 10 uF bulk capacitor near the AVCC pin (pin 3). The exposed thermal pad (EP) on the underside of the 64-QFN package MUST be soldered to a ground pour of at least 1 square inch to meet thermal and electrical specifications. Multiple ground vias in the EP pour reduce inductance and improve ADC noise immunity.
Route the JTAG signals (TCK pin 62, TMS pin 63, TDO pin 64) away from switching nodes and the LCD segment bus to avoid coupling during debug. Keep crystal traces (XTAL1 pin 45, XTAL2 pin 46) short and symmetric with a grounded guard ring. The analog supply (AVCC pin 3) should be filtered with a ferrite bead or 10 ohm resistor from VCC to provide clean ADC reference voltage.
Do not exceed 5.5 V on any VCC or AVCC pin - the absolute maximum rating is 6.0 V but sustained operation above 5.5 V risks EEPROM corruption. The RESET pin (pin 49) requires a 10 kohm pull-up to VCC and, if not used, can be left open only if the RSTDISBL fuse is programmed. When using the internal LCD controller, populate the LCDCAP pin (pin 14) with a 1 nF to 100 nF capacitor to stabilize the internal charge pump.
Estimated: at maximum 16 MHz operation and 5.5 V supply, the ATMEGA649P-MUR draws approximately 15 mA active, dissipating roughly 80 mW in the 64-QFN package. With the EP soldered to a 1 sq in copper pour, junction-to-ambient thermal resistance is approximately 30 C/W, yielding a 2.4 C temperature rise - well within the 125 C junction limit. Without the EP soldered, junction temperature can exceed limits at elevated ambient.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Green / Pb-free per Microchip Direct listing. Not AEC-Q100 qualified - for automotive safety applications choose a different part.
