ATMEGA649P-MUR - 16MHz 8-bit AVR MCU, 64KB Flash, 64-QFN | Microchip
N.º da peça: ATMEGA649P-MUR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.85 | $7,85 |
| 10 | $7.1 | $71,00 |
| 100 | $6.2 | $620,00 |
| 500 | $5.55 | $2.775,00 |
| 1.000 | $5.1 | $5.100,00 |
ATMEGA649P-MUR Visão geral
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.
Alternativas drop-in para ATMEGA649P-MUR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA649P-MUR (mesmo formato e footprint) — diferindo em Package, LCD Controller, Operating Temperature, Supply Voltage Range, Packaging.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA649P-MU
✅ Drop-In✓ Em estoque
$3.91 / unidade
Ver ficha técnica →ATMEGA649A-MUR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATMEGA649A-AUR
✅ Drop-In✓ Em estoque
$5.72 / unidade
Ver ficha técnica →ATMEGA329PA-MUR
✅ Drop-In✓ Em estoque
$3.85 / unidade
Ver ficha técnica →ATMEGA329A-MUR
✅ Drop-In✓ Em estoque
$3.61 / unidade
Ver ficha técnica →ATMEGA645-16MUR
✅ Drop-In✓ Em estoque
$3.35 / unidade
Ver ficha técnica →ATMEGA649P-MUR Classificações máximas e características elétricas
| 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 |
| Temperatura de operação | -40C to +85C (Industrial) |
| Encapsulamento | 64-QFN (9x9 mm) with exposed pad |
| Tipo de montagem | 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 |
| Status RoHS | Compliant |
| Lead-Free / Green | Yes (Green) |
| Packing Media | Tape and Reel (4000 per reel) |
Configuração de pinos do ATMEGA649P-MUR
| Pino 1 | VCC — Digital supply voltage |
| Pino 2 | GND — Digital ground |
| Pino 3 | AVCC — Analog supply voltage |
| Pino 4 | AGND — Analog ground |
| Pino 5 | AREF — ADC reference voltage |
| Pino 6 | ADC0 — Analog input channel 0 |
| Pino 7 | ADC1 — Analog input channel 1 |
| Pino 8 | ADC2 — Analog input channel 2 |
| Pino 9 | ADC3 — Analog input channel 3 |
| Pino 10 | ADC4 — Analog input channel 4 |
| Pino 11 | ADC5 — Analog input channel 5 |
| Pino 12 | ADC6 — Analog input channel 6 |
| Pino 13 | ADC7 — Analog input channel 7 |
| Pino 14 | LCDCAP — LCD supply capacitor |
| Pino 15 | SEG0 — LCD segment 0 |
| Pino 16 | SEG1 — LCD segment 1 |
| Pino 17 | SEG2 — LCD segment 2 |
| Pino 18 | SEG3 — LCD segment 3 |
| Pino 19 | SEG4 — LCD segment 4 |
| Pino 20 | SEG5 — LCD segment 5 |
| Pino 21 | SEG6 — LCD segment 6 |
| Pino 22 | SEG7 — LCD segment 7 |
| Pino 23 | SEG8 — LCD segment 8 |
| Pino 24 | SEG9 — LCD segment 9 |
| Pino 25 | SEG10 — LCD segment 10 |
| Pino 26 | SEG11 — LCD segment 11 |
| Pino 27 | SEG12 — LCD segment 12 |
| Pino 28 | SEG13 — LCD segment 13 |
| Pino 29 | SEG14 — LCD segment 14 |
| Pino 30 | SEG15 — LCD segment 15 |
| Pino 31 | SEG16 — LCD segment 16 |
| Pino 32 | SEG17 — LCD segment 17 |
| Pino 33 | SEG18 — LCD segment 18 |
| Pino 34 | SEG19 — LCD segment 19 |
| Pino 35 | SEG20 — LCD segment 20 |
| Pino 36 | SEG21 — LCD segment 21 |
| Pino 37 | SEG22 — LCD segment 22 |
| Pino 38 | SEG23 — LCD segment 23 |
| Pino 39 | COM0 — LCD common line 0 |
| Pino 40 | COM1 — LCD common line 1 |
| Pino 41 | COM2 — LCD common line 2 |
| Pino 42 | COM3 — LCD common line 3 |
| Pino 43 | RXD0/PDI — USART0 RX / Programming data in |
| Pino 44 | TXD0/PDO — USART0 TX / Programming data out |
| Pino 45 | XTAL1 — Crystal oscillator input |
| Pino 46 | XTAL2 — Crystal oscillator output |
| Pino 47 | TOSC1 — Timer oscillator pin 1 |
| Pino 48 | TOSC2 — Timer oscillator pin 2 |
| Pino 49 | RESET — Reset input (active low) |
| Pino 50 | VCC — Digital supply voltage |
| Pino 51 | GND — Digital ground |
| Pino 52 | PB0 — GPIO / SS (SPI bus master slave select) |
| Pino 53 | PB1 — GPIO / SCK (SPI clock) |
| Pino 54 | PB2 — GPIO / MOSI (SPI master out slave in) |
| Pino 55 | PB3 — GPIO / MISO (SPI master in slave out) |
| Pino 56 | PB4 — GPIO / OC0 (Timer0 compare) |
| Pino 57 | PB5 — GPIO / OC1A (Timer1 compare A) |
| Pino 58 | PB6 — GPIO / OC1B (Timer1 compare B) |
| Pino 59 | PB7 — GPIO / OC2 (Timer2 compare) |
| Pino 60 | SCL — TWI (I2C) clock |
| Pino 61 | SDA — TWI (I2C) data |
| Pino 62 | TCK — JTAG test clock |
| Pino 63 | TMS — JTAG test mode select |
| Pino 64 | TDO — JTAG test data out |
| Pino 65 | EP — Exposed thermal pad (must be soldered to GND) |
Aplicações típicas
ATMEGA649P-MUR é adequado para 7 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA649P-MUR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Integrated LCD controller reduces BOM and PCB area (vs ATMEGA645-16MUR)
- Double the Flash and SRAM of the ATmega329 family (vs ATMEGA329A-MUR)
- picoPower technology supports 1.8 V operation and ultra-low sleep current (vs ATMEGA649A-MUR)
Notas de projeto
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.
Informações de conformidade
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.
