ATMEGA329V-8MUR - 8MHz 32KB Flash AVR MCU | Microchip
N.º de pieza: ATMEGA329V-8MUR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.2 | $7,20 |
| 10 | $6.4 | $64,00 |
| 100 | $5.75 | $575,00 |
| 500 | $5.65 | $2.825,00 |
| 1.000 | $5.5 | $5.500,00 |
| 4.000 | $5.65 | $22.600,00 |
ATMEGA329V-8MUR Descripción general
An AVR microcontroller (MCU) is a single-chip computer built around the 8-bit AVR RISC architecture, executing one instruction per clock cycle to deliver high code density and deterministic timing. The ATmega family sits within the broader hierarchy of 8-bit microcontrollers -> microcontrollers -> embedded processors -> semiconductors. The 'V' suffix designates the low-voltage variant that extends operation down to 1.8V, making the part suited to battery-powered and energy-harvesting designs.
Key features include 32 KB Flash with read-while-write support, 1 KB EEPROM for non-volatile user data, 2 KB SRAM, an 8-channel 10-bit ADC, two 8-bit and one 16-bit Timer/Counters, a USART, SPI and TWI (I2C) serial interfaces, programmable watchdog timer with on-chip oscillator, and six sleep modes including Power-save and Power-down for ultra-low standby current. The device supports in-system programming via SPI and on-chip debug via JTAG.
The ATMEGA329V employs the classic AVR Harvard architecture with a two-stage pipeline, allowing most instructions to complete in a single cycle. Its 130+ powerful instruction set yields high code density; its hardware multiplier and rich peripheral set reduce the need for external components. The 64-QFN package offers a compact 9x9 mm footprint with excellent thermal performance for surface-mount designs.
Typical applications include display drivers (the 329 family supports integrated LCD control), industrial control panels, low-power sensor nodes, battery-powered instrumentation, and embedded human-machine interfaces (HMI). The wide 1.8V-5.5V operating range simplifies integration with single-cell Li-ion or 3.3V/5V mixed-rail systems.
When designing with this part, reserve the JTAG pins (PC2/TDI, PC3/TDO, PC4/TMS, PC5/TCK) appropriately if boundary-scan debug is needed, and place the 0.1 uF decoupling capacitor as close to AVCC/VCC pins as the PCB layout allows. The internal bandgap reference can be used to minimize external components in ADC designs.
This page synthesizes distributor stock, pricing and parametric data alongside drop-in alternatives and practical design notes - information that goes beyond a single manufacturer datasheet to give engineers a complete sourcing view.
Alternativas directas para ATMEGA329V-8MUR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATMEGA329V-8MUR (mismo factor de forma y huella) — difiere en ADC, Operating Temperature, Package, Communication Interfaces, LCD Controller.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATMEGA329V-8MU
✅ Sustitución directa✓ En stock
$4.27 / unidad
Ver hoja de datos →ATMEGA329PV-10MUR
✅ Sustitución directa✓ En stock
$3.99 / unidad
Ver hoja de datos →ATMEGA329V-8MI
✅ Sustitución directa✓ En stock
$5.45 / unidad
Ver hoja de datos →ATMEGA329A-MUR
✅ Sustitución directa✓ En stock
$3.61 / unidad
Ver hoja de datos →ATMEGA329PA-MUR
✅ Sustitución directa✓ En stock
$3.85 / unidad
Ver hoja de datos →ATMEGA3290V-8AUR
✅ Sustitución directa✓ En stock
$2.3 / unidad
Ver hoja de datos →ATMEGA329V-8MUR Valores máximos y características eléctricas
| Core | AVR 8-bit RISC |
| Program Memory Type | Flash |
| Program Memory Size | 32 KB (16K x 16) |
| EEPROM Size | 1 KB |
| SRAM Size | 2 KB |
| Maximum CPU Speed | 8 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O Pins | 54 |
| Ancho del bus de datos | 8 bit |
| ADC | 8-channel, 10-bit |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Serial Interfaces | 1 x USART, 1 x SPI, 1 x TWI (I2C) |
| Debug Interface | JTAG (IEEE 1149.1 compliant) |
| Encapsulado | 64-QFN (9x9 mm) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40 C to +85 C |
| Estado RoHS | Compliant |
Configuración de pines de ATMEGA329V-8MUR
| Pin 1 | VCC — Digital supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | AVCC — Analog supply voltage |
| Pin 4 | AREF — ADC reference voltage |
| Pin 5 | PA0 — Port A bit 0 (ADC0) |
| Pin 6 | PA1 — Port A bit 1 (ADC1) |
| Pin 7 | PA2 — Port A bit 2 (ADC2) |
| Pin 8 | PA3 — Port A bit 3 (ADC3) |
| Pin 9 | PA4 — Port A bit 4 (ADC4) |
| Pin 10 | PA5 — Port A bit 5 (ADC5) |
| Pin 11 | PA6 — Port A bit 6 (ADC6) |
| Pin 12 | PA7 — Port A bit 7 (ADC7) |
| Pin 13 | PB0 — Port B bit 0 |
| Pin 14 | PB1 — Port B bit 1 |
| Pin 15 | PB2 — Port B bit 2 (OC1B) |
| Pin 16 | PB3 — Port B bit 3 (OC2A) |
| Pin 17 | PB4 — Port B bit 4 |
| Pin 18 | PB5 — Port B bit 5 |
| Pin 19 | PB6 — Port B bit 6 |
| Pin 20 | PB7 — Port B bit 7 |
| Pin 21 | PC0 — Port C bit 0 |
| Pin 22 | PC1 — Port C bit 1 |
| Pin 23 | PC2 — Port C bit 2 (TDI) |
| Pin 24 | PC3 — Port C bit 3 (TDO) |
| Pin 25 | PC4 — Port C bit 4 (TMS) |
| Pin 26 | PC5 — Port C bit 5 (TCK) |
| Pin 27 | PC6 — Port C bit 6 |
| Pin 28 | PC7 — Port C bit 7 |
| Pin 29 | PD0 — Port D bit 0 (RXD) |
| Pin 30 | PD1 — Port D bit 1 (TXD) |
| Pin 32 | PD2 — Port D bit 2 (INT0) |
| Pin 33 | PD3 — Port D bit 3 (INT1) |
| Pin 34 | PD4 — Port D bit 4 (OC1B) |
| Pin 35 | PD5 — Port D bit 5 (OC1A) |
| Pin 36 | PD6 — Port D bit 6 (OC2B) |
| Pin 37 | PD7 — Port D bit 7 |
| Pin 38 | PE0 — Port E bit 0 (RXD0 / PDI) |
| Pin 39 | PE1 — Port E bit 1 (TXD0 / PDO) |
| Pin 40 | PE2 — Port E bit 2 (XCK0 / AIN0) |
| Pin 41 | PE3 — Port E bit 3 (OC3A / AIN1) |
| Pin 42 | PE4 — Port E bit 4 (OC3B / INT4) |
| Pin 43 | PE5 — Port E bit 5 (OC3C / INT5) |
| Pin 44 | PE6 — Port E bit 6 (T3 / INT6) |
| Pin 45 | PE7 — Port E bit 7 (ICP3 / INT7) |
| Pin 46 | PF0 — Port F bit 0 (ADC8) |
| Pin 47 | PF1 — Port F bit 1 (ADC9) |
| Pin 48 | PF2 — Port F bit 2 (ADC10) |
| Pin 49 | PF3 — Port F bit 3 (ADC11) |
| Pin 50 | PF4 — Port F bit 4 (ADC12 / TCK) |
| Pin 51 | PF5 — Port F bit 5 (ADC13 / TMS) |
| Pin 52 | PF6 — Port F bit 6 (ADC14 / TDO) |
| Pin 53 | PF7 — Port F bit 7 (ADC15 / TDI) |
| Pin 54 | PG0 — Port G bit 0 |
| Pin 55 | PG1 — Port G bit 1 |
| Pin 56 | PG2 — Port G bit 2 |
| Pin 57 | PG3 — Port G bit 3 |
| Pin 58 | PG4 — Port G bit 4 |
| Pin 59 | PG5 — Port G bit 5 (OC0B) |
| Pin 60 | RESET — Reset input (active low) |
| Pin 61 | VCC — Digital supply voltage |
| Pin 62 | GND — Ground |
| Pin 63 | XTAL2 — Crystal oscillator output |
| Pin 64 | XTAL1 — Crystal oscillator input |
Aplicaciones típicas
ATMEGA329V-8MUR es adecuado para 7 aplicacións: Battery-Powered Display Driver / HMI, Industrial Sensor Hub / Data Logger, Low-Power Wireless Sensor Node, Consumer Appliance Control Board, Instrumentation Front-End Controller, Educational and Prototyping Platform, Automotive Body Electronics (Non-Safety).
Battery-Powered Display Driver / HMI
The ATMEGA329V-8MUR is well suited to battery-powered segment-LCD human-machine interface designs. Its 1.8V-5.5V operating range allows direct connection to a single-cell Li-ion or 2xAA supply, while the 8 MHz clock is sufficient to refresh display buffers without flicker. The 32 KB Flash stores UI tables and menus; 2 KB SRAM holds the active display buffer. Compared with switching regulators the AVR core draws negligible quiescent current, extending battery life. Typical circuits add a charge-pump LCD bias network (the 329 family supports up to 4 common segments) and a small piezo buzzer on a Timer/Counter PWM pin for click feedback.
Recomendado
Industrial Sensor Hub / Data Logger
In distributed sensor nodes, the ATMEGA329V-8MUR aggregates analog sensor readings through its 8-channel 10-bit ADC and reports them over SPI or TWI to a host controller. The 1 KB EEPROM provides wear-leveled non-volatile storage for calibration constants and 10K+ write cycles per cell - ideal for logging configuration that survives power cycles. The 8 MHz AVR core delivers 8 MIPS, enabling real-time FFT preprocessing of vibration or strain signals. The wide 1.8V-5.5V supply simplifies integration with 3.3V digital sensors and 5V analog front ends via the same MCU rails.
Recomendado
Low-Power Wireless Sensor Node
For battery-powered wireless nodes (LoRa, Sub-GHz proprietary, BLE companion MCUs), the ATMEGA329V-8MUR serves as a low-power host MCU that wakes on interrupt, samples, and transmits. The AVR Power-save and Power-down sleep modes draw microamp-level standby current, and the Watchdog Timer with on-chip oscillator enables reliable wake-up without external components. The JTAG interface simplifies firmware development, while the QFN-64 (9x9 mm) footprint fits compact node PCBs. Pair with a Sub-GHz transceiver over SPI for a complete edge node.
Recomendado
Consumer Appliance Control Board
White-goods and small consumer appliances benefit from the ATMEGA329V-8MUR's balance of peripherals and cost. The 54 GPIO lines drive relays, triacs, keypads and status LEDs; the USART interfaces with a Bluetooth or Wi-Fi module for smart-appliance connectivity; the 16-bit Timer/Counter generates precise PWM for motor speed control. The 32 KB Flash accommodates state-machine control logic and safety routines, while the 1 KB EEPROM stores user preferences (mode, brightness, schedule) through power cycles without external NVRAM.
Recomendado
Instrumentation Front-End Controller
Bench-top measurement instruments (DMMs, calibrators, hand-held oscilloscopes) use the ATMEGA329V-8MUR for rotary-encoder UI, range switching and ADC sequencing. Its 10-bit ADC at 8 MHz oversamples low-bandwidth analog signals effectively; the TWI/I2C bus talks to external precision ADCs or DACs for high-accuracy front-end conditioning. The 64-QFN package aids thermal dissipation during extended measurement cycles, and the JTAG debug accelerates firmware iteration in development builds.
Recomendado
Educational and Prototyping Platform
Universities and hobbyists use the ATMEGA329V-8MUR as a teaching vehicle for embedded systems courses, where the QFN-64 footprint challenges students to practice reflow-soldering and JTAG debugging. The mature AVR toolchain (avr-gcc, Atmel Studio / Microchip Studio) is well documented and free. The 32 KB Flash allows substantial projects (RTOS-lite, USB stacks, display drivers) while the 8 MHz clock is adequate for educational timing exercises. Its wide 1.8V-5.5V supply also makes it friendly to breadboard prototyping with mixed voltage rails.
Recomendado
Automotive Body Electronics (Non-Safety)
Non-safety automotive subsystems (interior lighting controllers, mirror adjusters, HVAC flaps) use the ATMEGA329V-8MUR because of its robust AVR core, 1.8V-5.5V supply tolerant of 12V battery transients via external TVS clamps, and 64-QFN footprint for compact modules. The on-chip watchdog timer and brown-out detector add system integrity. Note that this part is NOT AEC-Q100 qualified; for safety-critical automotive designs, use ATMEGA329V-8MU equivalents with explicit automotive qualification status from Microchip.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATMEGA329V-8MUR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATMEGA329V-8MU | ATMEGA329PV-10MUR | ATMEGA329V-8MI | ATMEGA329A-MUR | ATMEGA329PA-MUR | ATMEGA3290V-8AUR |
|---|---|---|---|---|---|---|---|
| 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 |
| Maximum Clock Speed | 8 MHz | 8 MHz | 10 MHz | 8 MHz | 20 MHz | 20 MHz | 8 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| GPIO Count | 54 | 54 | 54 | 54 | 54 | 54 | 69 |
| Pico-Power Features | No | No | Yes | No | No | Yes | No |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Diferenciadores clave
- Wide 1.8V-5.5V operating range for battery and energy-harvesting designs (frente a ATmega329-16AU (non-V variant))
- Integrated QFN-64 package reduces PCB footprint vs TQFP alternatives (frente a ATmega329-16AU in TQFP-64)
- JTAG debug and ISP programming built-in for full development workflow (frente a ATmega328P-PU (DIP-28, no JTAG))
Notas de diseño
Decouple AVCC and VCC independently. Place a 10 uF bulk capacitor plus a 100 nF ceramic decoupling capacitor within 5 mm of each supply pin. If the ADC is unused, tie AVCC to VCC and leave AREF floating (or connect via 100 nF to ground for noise immunity). The ATMEGA329V-8MUR accepts 1.8V-5.5V but brown-out detection thresholds should be configured via fuses for the actual operating voltage to prevent spurious resets.
Route the JTAG signals (PC2/TDI, PC3/TDO, PC4/TMS, PC5/TCK) away from switching nodes and analog signal traces. Keep crystal traces short (<10 mm) and symmetric to minimize stray capacitance that detunes the oscillator. The QFN-64 (9x9 mm) package has a center thermal pad - solder it to a continuous ground plane for best thermal and electrical performance. Avoid running noisy digital signals directly under the QFN body to prevent coupling into AVCC/AREF.
Do not assume all ATmega329 variants operate below 4.5V - the non-V part (ATmega329-16AU) requires 4.5V-5.5V. The 'V' suffix in ATMEGA329V-8MUR is the explicit indicator of low-voltage 1.8V-5.5V support. Also note that programming via JTAG requires the JTAGEN fuse to be enabled; if disabled, ISP via SPI (MOSI/MISO/SCK on PORTB) must be used instead. Verify fuse settings before locking the device.
The 10-bit ADC on PORTA and PORTF achieves best accuracy with a sample-and-hold time matched to the source impedance. Use the internal 1.1V bandgap reference for ratiometric measurements, or apply an external precision reference to AREF for absolute measurements. The I2C (TWI) bus on the ATMEGA329V-8MUR requires external pull-up resistors (typically 2.2 k-10 k depending on bus speed and capacitance) - the AVR pins are open-drain only.
Información de cumplimiento
RoHS compliance indicated by 'R' suffix in MPN per Microchip part numbering convention. AEC-Q100 not qualified - this is an industrial/consumer part. For automotive applications, refer to Microchip's AEC-Q100 qualified ATmega lineup separately.
