ATMEGA324PV-10MU - 8-bit AVR MCU 10MHz 32KB Flash | Microchip
MPN: ATMEGA324PV-10MU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.63 | $8.63 |
| 10 | $7.95 | $79.50 |
| 100 | $7.15 | $715.00 |
| 500 | $6.55 | $3,275.00 |
| 1,000 | $5.98 | $5,980.00 |
ATMEGA324PV-10MU Overview
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripheral functions into one chip. Within the power-management hierarchy of embedded systems, an 8-bit MCU such as this occupies the entry-level tier: it executes one instruction per cycle in many cases (131 AVR instructions, most single-cycle), which is sufficient for control loops, sensor interfaces, and communication bridging without the cost or power of 32-bit devices.
Key features include the AVR advanced RISC architecture with 32 general-purpose working registers directly connected to the ALU, read-while-write ISP FLASH programming, and picoPower technology for aggressive sleep-current reduction. Peripherals include three flexible timers/counters with compare modes and PWM, two USARTs, a byte-oriented 2-wire serial interface (TWI/I2C), SPI, a 10-bit ADC, analog comparator, real-time counter with separate oscillator, and brown-out detection/reset.
Technically, the -10PU suffix denotes a 10MHz maximum clock with 1.8V low-voltage operation (the picoPower V-grade), versus the standard ATmega324P rated 20MHz at 4.5-5.5V. The 44-VQFN 7x7 mm package with 0.5 mm pad pitch saves board area versus the 44-TQFP option while retaining the same die and pin functions.
Typical applications include industrial sensor nodes, battery-powered meters and remote controls, motor control and PWM actuation, consumer appliance controllers, and low-power IoT edge devices where the two USARTs and TWI bus simplify multi-chip communication.
For design, at 5V the maximum clock is limited to 10MHz by the V speed grade; ensure brown-out detection is enabled in systems with slowly-rising supplies, and place 100nF decoupling on both VCC pins plus the AVCC pin.
This page adds value beyond the datasheet by consolidating distributor pricing, drop-in alternatives, comparison tables, and practical design guidance in one place.
Drop-in alternatives for ATMEGA324PV-10MU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA324PV-10MU (same form factor and footprint) — differing in Package, Flash Memory, Number of I/O, RoHS Status, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA324PA-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.05 / Unit
View Datasheet →ATMEGA324P-A15MZ
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →ATMEGA324PB-MU
✅ Drop-In✓ In Stock
$1.35 / Unit
View Datasheet →ATMEGA644PV-10MU
✅ Drop-In✓ In Stock
$4.88 / Unit
View Datasheet →ATMEGA644PA-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.78 / Unit
View Datasheet →ATMEGA1284P-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.1 / Unit
View Datasheet →ATMEGA324PV-10MU Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 10 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 32 KB (16K x 16) |
| EEPROM Size | 1 KB |
| RAM Size | 2 KB |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 32 |
| Connectivity | I2C, SPI, UART/USART (2x) |
| Peripherals | Brown-out Detect/Reset, PWM, WDT, Real-Time Counter |
| Timers/Counters | 3 flexible timers/counters with compare modes and PWM |
| Oscillator Type | Internal |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 44-VQFN (7x7 mm) |
| Mounting Type | Surface Mount |
| Architecture | AVR advanced RISC, 131 instructions, 32 working registers |
| RoHS Status | Compliant (GREEN) |
ATMEGA324PV-10MU 44-vqfn (7x7 mm) Pin Configuration Guide
Pin configuration for ATMEGA324PV-10MU (44-vqfn (7x7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA324PV-10MU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA324PV-10MU is suitable for 6 applications: Battery-Powered Sensor Nodes, Industrial Control and Automation, Motor Control and PWM Actuation, Communication Bridges and Gateways, Measurement and Data Logging, Appliance and Consumer Controllers.
Battery-Powered Sensor Nodes
The ATMEGA324PV-10MU suits battery-powered sensing because its picoPower V-grade runs from 1.8V (two AA cells) and its low sleep current enables multi-month to multi-year battery life. In a typical node, the MCU sleeps in power-save mode with the real-time counter clocked by a 32.768kHz crystal, wakes on a timer or pin interrupt, reads a sensor over TWI or the 10-bit ADC, and transmits via one USART. Designers should enable brown-out detection and shut down unused peripheral clocks (power reduction registers) between measurements to minimize average current. The second USART can service a field-upgrade or diagnostics link without disturbing the main radio.
Recommended
Industrial Control and Automation
With an industrial -40C to +85C rating, three timers with PWM, brown-out reset, and a watchdog, the ATMEGA324PV-10MU handles industrial control panels, valve drivers, and actuator sequencing. The 10MHz clock is ample for PID loops executing in single-cycle AVR instructions, while 32 GPIOs drive relays, optocouplers, and status LEDs directly through driver transistors. The dual USARTs allow simultaneous Modbus RTU communication and a local service console; TWI and SPI connect ADCs, EEPROMs, and HMI displays. Designers should route motor switching away from the ADC ground reference and use the internal PLL-free clocking with an external crystal for deterministic timing in Profibus-like polling schemes.
Recommended
Motor Control and PWM Actuation
The three flexible timers/counters with compare modes and PWM outputs make the ATMEGA324PV-10MU a compact controller for DC and stepper motors in appliances, robotics, and HVAC dampers. At 10MHz, an 8-bit PWM can run at roughly 39kHz on Timer0/2, comfortably above audible range, while 16-bit Timer1 generates precise servo or commutation intervals. The analog comparator provides low-cost over-current or zero-crossing detection without an external comparator IC. Because the -10 grade runs from 1.8V, it pairs naturally with low-voltage gate drivers in battery tools. Keep high-current motor returns on a separate ground plane and sense current through a shunt into the 10-bit ADC for closed-loop torque limiting.
Recommended
Communication Bridges and Gateways
Equipped with two USARTs plus TWI and SPI, the ATMEGA324PV-10MU is an economical protocol bridge: for example RS-232 service port to RS-485 field bus, or UART to I2C converter between an industrial master and digital sensors. The 32KB FLASH leaves room for dual firmware banks enabling safe in-field updates via the ISP bootloader, and the 1KB EEPROM stores node addresses and calibration constants that survive power cycles. A 10MHz V-grade running at 3.3V interoperates directly with modern 3.3V transceivers without level shifting. Designers should implement frame timeouts and CRC in software since the AVR UART lacks hardware parity-checked framing beyond 9-bit modes.
Recommended
Measurement and Data Logging
The integrated 10-bit ADC, analog comparator, and 1KB EEPROM let the ATMEGA324PV-10MU form the core of low-cost meters, loggers, and diagnostic instruments. The V-grade operation at 1.8-5.5V allows direct measurement off small batteries via a resistor divider on AREF-referenced channels, while read-while-write FLASH supports buffering data records between EEPROM wear-levelling writes. Timer-based sampling with the real-time counter provides accurate time-stamping in power-save duty cycles. For precision front-ends, add an external higher-resolution ADC over TWI or SPI and use the MCU only for control and storage. Calibrate gain and offset at production and store correction constants in EEPROM per unit.
Recommended
Appliance and Consumer Controllers
Consumer appliances - coffee machines, fans, heaters, chargers - exploit the ATMEGA324PV-10MU's combination of low cost, single-chip integration, and the GREEN RoHS-compliant build required by retail regulations. The internal oscillator can clock cost-sensitive designs without a crystal, the 32 GPIOs scan keypads and drive 7-segment or LCD-segment displays via software multiplexing, and PWM controls heaters and fan speeds with quiet high-frequency operation. Brown-out detection keeps user settings in EEPROM intact during brownout events on shared mains supplies. The 44-VQFN 7x7 mm footprint fits compact control PCBs behind front panels, and the industrial temperature grade tolerates enclosed, poorly ventilated housings.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA324PV-10MU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA324PA-MU | ATMEGA324PB-MU | ATMEGA644PV-10MU | ATMEGA1284P-MU |
|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 128 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 4 KB | 16 KB |
| Max Clock Speed | 10 MHz | 20 MHz | 20 MHz | 10 MHz | 20 MHz |
| Supply Voltage | 1.8 V - 5.5 V | 1.8 V - 5.5 V | 1.8 V - 5.5 V | 1.8 V - 5.5 V | 1.8 V - 5.5 V |
| USART Count | 2 | 2 | 3 | 2 | 2 |
| Power Optimization | picoPower | picoPower (improved) | picoPower | picoPower | picoPower |
Key Differentiators
- Lowest-voltage operation in the ATmega324 44-VQFN family (vs ATMEGA324P-A15MZ)
- Third USART and richer peripherals (vs ATMEGA324PB-MU)
- Cost-efficient 32KB entry point (vs ATMEGA644PV-10MU)
- Microchip-endorsed successor path (vs ATMEGA324PA-MU)
Design Notes
Decouple both VCC pins and AVCC with 100nF ceramic capacitors placed within 3-5 mm of each pin, plus 10uF bulk near the supply entry. Connect AVCC to VCC through an LC filter (10uH + 100nF) when the ADC is used in noisy environments. Enable brown-out detection via the BODLEVEL fuse because the wide 1.8-5.5V range often serves battery systems with slowly decaying supplies; without BOD, EEPROM corruption and FLASH mis-writes can occur below the minimum operating voltage.
The 44-VQFN (7x7 mm) MLF package has no leads; its perimeter pads and the large center die pad must be soldered via reflow. Design the footprint per Microchip application note on MLF/VQFN land patterns, with the center pad tied to a 4x4 via array to the ground plane for both thermal dissipation and solder-joint reliability. Do not use the MLF footprint for a TQFP part or vice versa - they are not interchangeable despite identical pin functions.
Respect the speed-versus-voltage derating: the -10 grade is safe at 10MHz across the full 1.8-5.5V range, but do not over-clock toward 20MHz at low supply as the standard-grade curve allows. If migrating firmware to ATMEGA324PB, verify multiplexed pin functions (especially PWM output locations and TWI pin assignments) since the PB remaps some peripherals. Also check fuse settings (JTAGEN, CKDIV8) before first programming - default CKDIV8 halves the clock.
Compliance Information
Distributor and aggregator data describe the part as GREEN (RoHS/halogen-free lead-free construction). Industrial temperature grade; not an automotive AEC-Q100 part.