ATMEGA324PV-10AU - 8-bit AVR MCU, 32KB Flash, 10MHz, 44-TQFP | Microchip
MPN: ATMEGA324PV-10AU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.73 | $6.73 |
| 10 | $6.05 | $60.50 |
| 100 | $5.38 | $538.00 |
| 500 | $4.84 | $2,420.00 |
| 1,000 | $4.3 | $4,300.00 |
ATMEGA324PV-10AU Overview
An 8-bit AVR microcontroller (MCU) is a single-chip computer built on a modified Harvard RISC architecture developed by Atmel (now Microchip). It combines a CPU core, non-volatile Flash program memory, SRAM data memory, EEPROM, and a rich set of peripherals including timers, ADC, USART, SPI, I2C/TWI, and GPIO on one die. The AVR family is widely used in hobbyist (Arduino), industrial control, sensor interface, and low-power embedded applications because of its deterministic instruction timing, simple C-friendly toolchain (AVR-GCC), and on-chip debug support.
The ATmega324PV specifically targets the picoPower family, with advanced power-saving features including six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby), a real-time counter running from an internal oscillator, and the ability to wake on external interrupts. Peripherals of engineering note include two USARTs, a byte-oriented TWI (I2C) interface, a master/slave SPI, an 8-channel 10-bit ADC with optional differential channels, three flexible timer/counters with compare and PWM modes, a programmable watchdog timer with separate on-chip oscillator, and an on-chip analog comparator.
Architecture-wise, the ATmega324PV uses a two-stage pipelined RISC core with 131 powerful instructions, hardware multiplier, and JTAG/OCD debug interface. The 10 MHz speed grade is the lower-power variant in the family, with the 20 MHz ATmega324P-20AU offering higher throughput at the cost of higher current consumption. The 'V' suffix denotes the picoPower process with extended voltage range down to 1.8V, ideal for battery-powered designs.
Typical applications include industrial sensor nodes, smart metering, battery-powered data loggers, home automation controllers, USB-to-UART bridges, and Arduino-compatible custom boards. For designs requiring higher computational headroom, the ATmega324P-20AU (20 MHz) or ATmega644P (64KB Flash) are drop-in compatible variants. For designs requiring an enhanced peripheral set, the ATmega324PB adds more USART, SPI and PWM channels in the same TQFP-44 footprint.
Drop-in alternatives for ATMEGA324PV-10AU — 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-10AU (same form factor and footprint) — differing in ADC, Program Memory (Flash), Package, EEPROM, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA324P-20AU
✅ Drop-In✓ In Stock
$6.24 / Unit
View Datasheet →ATMEGA324PA-AU
✅ Drop-In✓ In Stock
$2.87 / Unit
View Datasheet →ATMEGA324PV-10AN
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA644PV-10AUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA164A-AU
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →ATMEGA324PB-AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA324PV-10AU Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| Maximum CPU Frequency | 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General-Purpose I/O | 32 |
| General-Purpose Registers | 32 |
| Instruction Set | 131 instructions, most single-cycle |
| Performance | Up to 10 MIPS at 10 MHz |
| USART | 2 |
| SPI | 1 (master/slave) |
| TWI (I2C) | 1 byte-oriented |
| ADC | 8-channel, 10-bit |
| Timer/Counters | 3 (with PWM and compare modes) |
| Watchdog Timer | Yes, programmable with separate oscillator |
| Analog Comparator | Yes, on-chip |
| RTC | Yes, real-time counter |
| Debug Interface | JTAG / OCD (debugWIRE) |
| Package | 44-pin TQFP (10x10 mm), 0.80 mm pitch |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| Process Family | picoPower |
| RoHS Status | Compliant |
ATMEGA324PV-10AU Pin Configuration
| Pin 1 | PB5 (MOSI) — Port B5 / SPI MOSI / OC1A |
| Pin 2 | PB6 (MISO) — Port B6 / SPI MISO / OC1B |
| Pin 3 | PB7 (SCK) — Port B7 / SPI SCK / OC1C |
| Pin 4 | RESET — Reset input (active low) |
| Pin 5 | VCC — Digital supply voltage (1.8V-5.5V) |
| Pin 6 | GND — Ground |
| Pin 7 | VCC — Digital supply voltage |
| Pin 8 | GND — Ground |
| Pin 9 | XTAL2 — Crystal oscillator output |
| Pin 10 | XTAL1 — Crystal oscillator input |
| Pin 11 | PD0 (RXD0) — Port D0 / USART0 RXD |
| Pin 12 | PD1 (TXD0) — Port D1 / USART0 TXD |
| Pin 13 | PD2 (INT0) — Port D2 / External Interrupt 0 |
| Pin 14 | PD3 (INT1) — Port D3 / External Interrupt 1 |
| Pin 15 | PD4 (OC1B) — Port D4 / Timer1 Compare B |
| Pin 16 | PD5 (OC1A) — Port D5 / Timer1 Compare A |
| Pin 17 | PD6 (ICP1) — Port D6 / Timer1 Input Capture |
| Pin 18 | PD7 (OC2) — Port D7 / Timer2 Compare |
| Pin 19 | PC0 (SCL) — Port C0 / TWI SCL / ADC0 |
| Pin 20 | PC1 (SDA) — Port C1 / TWI SDA / ADC1 |
| Pin 21 | PC2 (TCK) — Port C2 / JTAG TCK / ADC2 |
| Pin 22 | PC3 (TMS) — Port C3 / JTAG TMS / ADC3 |
| Pin 23 | PC4 (TDO) — Port C4 / JTAG TDO / ADC4 |
| Pin 24 | PC5 (TDI) — Port C5 / JTAG TDI / ADC5 |
| Pin 25 | PC6 (TOSC1) — Port C6 / Timer0 Oscillator / RESET |
| Pin 26 | PC7 (TOSC2) — Port C7 / Timer0 Oscillator |
| Pin 27 | AVCC — Analog supply voltage |
| Pin 28 | AGND — Analog ground |
| Pin 29 | AREF — ADC reference voltage |
| Pin 30 | ADC6 — ADC input 6 (differential) |
| Pin 31 | ADC7 — ADC input 7 (differential) |
| Pin 32 | PA7 (ADC7) — Port A7 / ADC7 |
| Pin 33 | PA6 (ADC6) — Port A6 / ADC6 |
| Pin 34 | PA5 (ADC5) — Port A5 / ADC5 |
| Pin 35 | PA4 (ADC4) — Port A4 / ADC4 |
| Pin 36 | PA3 (ADC3) — Port A3 / ADC3 |
| Pin 37 | PA2 (ADC2) — Port A2 / ADC2 |
| Pin 38 | PA1 (ADC1) — Port A1 / ADC1 |
| Pin 39 | PA0 (ADC0) — Port A0 / ADC0 |
| Pin 40 | VCC — Digital supply voltage |
| Pin 41 | GND — Ground |
| Pin 42 | PB0 (XCK0) — Port B0 / USART0 XCK |
| Pin 43 | PB1 (T1) — Port B1 / Timer1 External Clock |
| Pin 44 | PB2 (AIN0) — Port B2 / Analog Comparator + |
Typical Applications
ATMEGA324PV-10AU is suitable for 6 applications: Industrial Sensor Node, Battery-Powered Data Logger, Home Automation Controller, USB-to-UART Bridge, Smart Meter Endpoint, Arduino-Compatible Custom Board.
Industrial Sensor Node
The ATMEGA324PV-10AU's 32KB Flash, 2KB SRAM, and 8-channel 10-bit ADC suit multi-signal industrial monitoring where several analog sensors (temperature, pressure, 4-20 mA loops) must be sampled and conditioned. The picoPower sleep currents under 1 uA in power-down mode and 1.8V minimum supply let the MCU run for years from a primary cell while still waking on external interrupts to log sensor events. The 32 GPIO and two USARTs allow direct connection to RS-485 transceivers for Modbus RTU slaves. Per the Microchip datasheet, the on-chip analog comparator and watchdog timer with dedicated oscillator provide robust fail-safe behavior in unattended installations.
Recommended
Battery-Powered Data Logger
The ATMEGA324PV-10AU's picoPower process delivers typical active current around 4 mA at 3.3V/10 MHz and power-down current under 1 uA, enabling multi-year battery life in periodic-logging applications. The 32KB Flash stores firmware plus a small FAT filesystem, 1KB EEPROM holds configuration and calibration constants with 100k write endurance, and 2KB SRAM buffers sensor bursts between sleeps. The real-time counter running from an internal 32.768 kHz oscillator maintains wall-clock time without external crystals. With a single CR2032 cell, an hourly wake-and-log duty cycle can yield 5+ years of service life.
Recommended
Home Automation Controller
Home automation hubs benefit from the ATMEGA324PV-10AU's dual USART, TWI (I2C), and SPI buses to bridge multiple radios (Zigbee, LoRa, BLE) with a Wi-Fi host MCU. The 32 GPIO drive low-voltage relay boards, keypad matrices, and indicator LEDs directly without external logic. With Arduino MightyCore firmware support, the same development environment used for prototyping scales directly to production. The 10 MHz speed grade keeps active power modest for always-on controllers that must stay responsive yet minimize standby energy consumption.
Recommended
USB-to-UART Bridge
The ATMEGA324PV-10AU implements a USB CDC bridge by running V-USB on the AVR core, leveraging two hardware USARTs to expose dual serial ports over a single USB cable. At 10 MHz the firmware sustains 115200 bps full-duplex on both channels with low CPU loading. The wide 1.8V to 5.5V supply range simplifies integration with 1.8V host devices and 5V legacy peripherals. Internal pull-ups on TWI pins and the on-chip analog comparator support DTR/RTS handshaking without external components.
Recommended
Smart Meter Endpoint
Utility smart-meter endpoints require low quiescent current, tamper-resistant secure storage, and reliable long-life operation - all delivered by the ATMEGA324PV-10AU's picoPower architecture. The 1KB EEPROM stores meter calibration and tamper counters with 100k write endurance, while the 32KB Flash holds metering firmware and protocol stacks such as DLMS/COSEM or Wireless M-Bus. The on-chip RTC with separate oscillator provides billing-grade timekeeping, and the watchdog timer guards against firmware hangs in unattended deployments.
Recommended
Arduino-Compatible Custom Board
The ATMEGA324PV-10AU is supported by the MightyCore Arduino board package, delivering 32KB Flash, 2KB SRAM, and 32 GPIO - substantially more than the classic ATmega328P. Designers can reuse existing Arduino libraries for I2C, SPI, and UART peripherals while gaining extra timers and PWM channels for motor or lighting control. The 10 MHz speed grade reduces power consumption versus the 16/20 MHz ATmega328P variants used in Arduino Uno, beneficial for battery-powered clones and field-installable sensor nodes.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA324PV-10AU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA324P-20AU | ATMEGA324PA-AU | ATMEGA324PV-10AN | ATMEGA644PV-10AUR | ATMEGA164A-AU | ATMEGA324PB-AU |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Max CPU Frequency | 10 MHz | 20 MHz | 20 MHz | 10 MHz | 10 MHz | 20 MHz | 20 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB | 1 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | 512 B | 1 KB |
| Supply Voltage | 1.8 V to 5.5 V | 2.7 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 |
| picoPower | Yes | No | Yes | Yes | Yes | Yes | Yes |
| GPIO | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +105C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
Key Differentiators
- True 1.8V minimum supply operation across full temperature range (vs ATMEGA324P-20AU)
- Industry-standard TQFP-44 footprint with mature AVR toolchain support (vs ATMEGA164A-AU)
- Dual USART with hardware flow control (vs ATMEGA324PV-10AN)
- Direct Arduino MightyCore compatibility with 32KB Flash headroom (vs ATMEGA324PB-AU)
Design Notes
Estimated: at VCC=3.3V, 10 MHz active CPU, typical core current is about 4 mA and drops to <1 uA in power-down mode with RTC running. For battery-powered designs, use sleep modes between sensor reads and disable unused peripherals via PRR (Power Reduction Register). The internal 8 MHz RC oscillator can be calibrated and used instead of an external crystal to save quiescent draw. Always include a 100 nF decoupling capacitor within 5 mm of each VCC pin and a 10 uF bulk capacitor at the board supply input.
The TQFP-44 has a typical theta_JA of about 50 C/W (JEDEC EIA/JESD51 4-layer board). With 4 mA active current at 5V, dissipation is roughly 20 mW, so junction rise above ambient is only about 1 C - no heatsink is needed. For sustained full-load operation at elevated ambient (>70C), verify that brown-out detector and watchdog remain within tolerance. The exposed pad on the package underside is not present on this part, so thermal relief comes solely from PCB copper pour on VCC/GND pins.
Place the 22 pF crystal load capacitors within 3 mm of XTAL1 and XTAL2 with short traces and a ground guard ring to reduce EMI coupling into the ADC. Route analog AVCC/AREF separately from digital VCC, joined only at a single point near the regulator. The 44-pin TQFP has 0.80 mm pitch - use 0.20 mm trace/space design rules and 0.40 mm via land to maintain manufacturability at standard PCB fab houses. Keep JTAG signals away from high-frequency switching nodes.
The ADC achieves 10-bit effective resolution only when the input source impedance stays below 10 kOhm per the datasheet. Add an external op-amp buffer if a high-impedance sensor (e.g. a thermistor divider) is connected directly. Decouple AREF with a 100 nF ceramic capacitor to AGND, and avoid switching digital signals near AREF traces. For SPI runs above 5 MHz, use series damping resistors (~22-33 ohm) at the SCK/MOSI drivers to reduce ringback.
Do not program the fuse bits for an external clock without first confirming the crystal is populated - a misconfigured ATmega may become bricked and require high-voltage parallel programming to recover. The 'V' suffix denotes the 1.8V-capable picoPower variant; writing 20 MHz timing to this 10 MHz part can cause Flash corruption during ISP programming. Always verify the signature byte 0x1E9511 at the start of any field firmware update. Use the internal watchdog timer (WDT) with a 1-second timeout to recover from software hangs in unattended deployments.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - refer to ATmega324P-15CZ automotive variants for vehicle applications.