ATMEGA329PV-10MUR - 8-bit AVR MCU 32KB Flash QFN-64 | Microchip
MPN: ATMEGA329PV-10MUR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.32 | $6.32 |
| 10 | $5.65 | $56.50 |
| 100 | $4.93 | $493.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.99 | $3,990.00 |
ATMEGA329PV-10MUR Overview
An 8-bit AVR microcontroller (AVR = Alf and Vegard's RISC processor, originally developed at the Norwegian University of Science and Technology) is a Harvard-architecture MCU optimized for single-cycle instruction execution, deterministic interrupt response, and ultra-low active/idle power consumption. The ATmega sits in the broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. AVR cores execute most instructions in one clock cycle, giving this family roughly 10 MIPS throughput at 10 MHz, which is the throughput required by the real-time control loops this device targets.
Key differentiating features include hardware LCD controller supporting up to 4x40 segments without external drivers, 54 general-purpose I/O lines, two 8-bit timers plus one 16-bit timer, a 10-bit ADC with up to 8 channels, an internal calibrated oscillator, and six software-selectable power-saving modes. The pico-power technology enables true 1.8V operation down to extended industrial temperatures (-40C to +85C for the "U" grade), making the part well suited to battery-powered instruments and metering applications.
The architecture integrates a 131-instruction RISC core, fully static operation, and a QTouch library for capacitive touch via the on-chip peripheral touch controller, enabling modern touch-button UI without external ICs. Hardware multipliers via two-cycle instructions and a JTAG/debugWIRE interface support both production programming and in-circuit debug.
Typical applications include battery-powered utility metering (electricity, gas, water), portable medical monitoring devices, white-goods and appliance user interfaces with integrated LCD, automotive body and instrument clusters requiring 1.8V operation, and capacitive touch user panels replacing mechanical buttons. The integrated LCD controller is the dominant reason designers choose the ATmega329 family over general-purpose ATmega parts.
Design considerations include supply-decoupling discipline (place a 100nF X7R ceramic adjacent to every Vcc/AVcc pin), the necessity of a 32.768 kHz watch crystal for the asynchronous timer when RTC accuracy is required, and keeping the QFN thermal pad soldered to a sufficiently large copper pour for thermal relief at higher ambient temperatures. The on-chip LCD charge pump requires careful routing of its reservoir capacitors per the application note.
This page consolidates distributor pricing, QFN-64 drop-in alternatives, and practical design guidance that goes beyond the bare datasheet to help engineers choose the ATMEGA329PV-10MUR quickly and source it confidently.
Drop-in alternatives for ATMEGA329PV-10MUR — 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 ATMEGA329PV-10MUR (same form factor and footprint) — differing in ADC, Operating Temperature, Package, LCD Controller, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA329PV-10MU
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA329PA-MUR
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →ATMEGA329V-8MUR
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ATMEGA329A-MUR
✅ Drop-In✓ In Stock
$3.61 / Unit
View Datasheet →ATMEGA329-16AUR
✅ Drop-In✓ In Stock
$2.15 / Unit
View Datasheet →ATMEGA329PV-10MUR Maximum Ratings & Electrical Characteristics
| Core | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum Clock Speed | 10 MHz |
| Supply Voltage (Vcc) | 1.8 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial, U grade) |
| Number of I/O Pins | 54 |
| Package Type | 64-pin QFN (9x9 mm) |
| Timers | 2 x 8-bit + 1 x 16-bit |
| ADC | 10-bit, up to 8 channels |
| On-chip LCD Controller | Up to 4x40 segments |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Programming/Debug Interface | JTAG / debugWIRE |
| Mounting Type | Surface Mount |
| MSL Sensitivity Level | MSL3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes (per Microchip product page) |
ATMEGA329PV-10MUR Pin Configuration
| Pin 1 | SEG0 — LCD segment output 0 |
| Pin 2 | SEG1 — LCD segment output 1 |
| Pin 3 | SEG2 — LCD segment output 2 |
| Pin 4 | SEG3 — LCD segment output 3 |
| Pin 5 | SEG4 — LCD segment output 4 |
| Pin 6 | SEG5 — LCD segment output 5 |
| Pin 7 | SEG6 — LCD segment output 6 |
| Pin 8 | SEG7 — LCD segment output 7 |
| Pin 9 | SEG8 — LCD segment output 8 |
| Pin 10 | SEG9 — LCD segment output 9 |
| Pin 11 | SEG10 — LCD segment output 10 |
| Pin 12 | SEG11 — LCD segment output 11 |
| Pin 13 | SEG12 — LCD segment output 12 |
| Pin 14 | SEG13 — LCD segment output 13 |
| Pin 15 | SEG14 — LCD segment output 14 |
| Pin 16 | SEG15 — LCD segment output 15 |
| Pin 17 | SEG16 — LCD segment output 16 |
| Pin 18 | SEG17 — LCD segment output 17 |
| Pin 19 | SEG18 — LCD segment output 18 |
| Pin 20 | SEG19 — LCD segment output 19 |
| Pin 21 | VCC — Digital supply voltage |
| Pin 22 | GND — Digital ground |
| Pin 23 | AVCC — Analog supply voltage |
| Pin 24 | AREF — ADC reference voltage |
| Pin 25 | ADC0 — Analog input channel 0 |
| Pin 26 | ADC1 — Analog input channel 1 |
| Pin 27 | ADC2 — Analog input channel 2 |
| Pin 28 | ADC3 — Analog input channel 3 |
| Pin 29 | ADC4 — Analog input channel 4 |
| Pin 30 | ADC5 — Analog input channel 5 |
| Pin 31 | ADC6 — Analog input channel 6 |
| Pin 32 | ADC7 — Analog input channel 7 |
| Pin 33 | XTAL1 — Crystal oscillator pin 1 |
| Pin 34 | XTAL2 — Crystal oscillator pin 2 |
| Pin 35 | RESET — Reset input (active low) |
| Pin 36 | PB0 — Port B bit 0 / SS |
| Pin 37 | PB1 — Port B bit 1 / SCK |
| Pin 38 | PB2 — Port B bit 2 / MOSI |
| Pin 39 | PB3 — Port B bit 3 / MISO |
| Pin 40 | PB4 — Port B bit 4 |
| Pin 41 | PB5 — Port B bit 5 |
| Pin 42 | PB6 — Port B bit 6 |
| Pin 43 | PB7 — Port B bit 7 |
| Pin 44 | PC0 — Port C bit 0 / SCL |
| Pin 45 | PC1 — Port C bit 1 / SDA |
| Pin 46 | PC2 — Port C bit 2 |
| Pin 47 | PC3 — Port C bit 3 |
| Pin 48 | PC4 — Port C bit 4 |
| Pin 49 | PC5 — Port C bit 5 |
| Pin 50 | PC6 — Port C bit 6 |
| Pin 51 | PC7 — Port C bit 7 |
| Pin 52 | PD0 — Port D bit 0 / RXD |
| Pin 53 | PD1 — Port D bit 1 / TXD |
| Pin 54 | PD2 — Port D bit 2 |
| Pin 55 | PD3 — Port D bit 3 |
| Pin 56 | PD4 — Port D bit 4 |
| Pin 57 | PD5 — Port D bit 5 |
| Pin 58 | PD6 — Port D bit 6 |
| Pin 59 | PD7 — Port D bit 7 |
| Pin 60 | PE0 — Port E bit 0 |
| Pin 61 | PE1 — Port E bit 1 |
| Pin 62 | PE2 — Port E bit 2 |
| Pin 63 | PE3 — Port E bit 3 |
| Pin 64 | TOSC1 — Timer oscillator pin 1 (32.768 kHz) |
Typical Applications
ATMEGA329PV-10MUR is suitable for 7 applications: Battery-Powered Utility Metering, Portable Medical Monitoring Devices, Home Appliance User Interfaces with LCD, Capacitive Touch User Panels, Industrial Sensor Transmitters, Automotive Body and Instrument Clusters, Educational and Hobby Embedded Projects.
Battery-Powered Utility Metering
The ATMEGA329PV-10MUR is the canonical Microchip device for single-cell battery electricity, gas, and water meters. Its 1.8 V minimum Vcc and pico-power sleep modes (typically <1 uA in Power-save with LCD on) eliminate the boost converter and let a primary Li-MnO2 cell drive the meter for the full 10-15 year calibration life. The integrated 4x40-segment LCD controller drives the meter's segmented glass directly via the internal charge pump, removing an external HT1621-class driver and its standby current. Real-world deployments achieve multi-year battery life while running periodic ADC sampling, RF burst transmissions, and segmented LCD refresh on the same die.
Recommended
Portable Medical Monitoring Devices
The ATMEGA329PV-10MUR is well suited to handheld patient monitors and ambulatory devices where low-power operation and a built-in segmented LCD driver shorten the BOM. The 1.8 V rail lets the design run directly from a single CR2032 or rechargeable Li-Ion cell, while the 54 I/O pins expose enough peripherals for sensor front ends, a tactile keypad, and a piezo buzzer. The integrated 4x40 LCD controller directly drives a 4-mux reflective glass, avoiding any auxiliary display driver and its quiescent current. Pico-power sleep under 1 uA enables weeks-long battery life between charges in continuous-monitoring applications.
Recommended
Home Appliance User Interfaces with LCD
Dishwashers, washing machines, microwaves, and air-conditioner indoor units all need a segmented LCD or VFD and a long-life user interface. The ATMEGA329PV-10MUR drives up to 4x40 LCD segments without an external driver, eliminating the 6-12 dollars of BOM cost an HT1621 or PCF8576 would add. Its 1.8 V to 5.5 V range lets the appliance share a single 5 V or 3.3 V rail without a separate analog supply. The 16-bit timer and PWM channels can drive motor control or buzzer signaling alongside the LCD refresh, reducing part count.
Recommended
Capacitive Touch User Panels
The ATMEGA329PV-10MUR's peripheral touch controller (PTC) supports QTouch-acquired capacitive buttons, sliders, and wheels without an external touch IC. Designers can implement 12-20 touch keys via PCB pads plus a segmented LCD driven directly by the same MCU, enabling appliance and consumer-electronic front panels with no display driver and no touch IC - just the ATmega, a glass, and a few capacitors. The 10 MIPS throughput at 10 MHz is sufficient for PTC acquisition plus application logic and LCD refresh under typical scan rates.
Recommended
Industrial Sensor Transmitters
Industrial 4-20 mA loop-powered transmitters, RTU front ends, and remote sensor nodes benefit from the ATMEGA329PV-10MUR's 1.8 V operation and the on-chip ADC. Up to 8 channels of 10-bit ADC, combined with the on-chip op-amp in the analog comparator, let a single MCU digitize and transmit temperature, pressure, or flow sensor data over SPI, TWI, or USART. The QFN-64 package's exposed thermal pad and industrial -40 to +85C temperature grade handle factory-floor environments with adequate PCB copper area.
Recommended
Automotive Body and Instrument Clusters
The ATMEGA329PV-10MUR is used in automotive body controllers, climate-control panels, and aftermarket instrument clusters where a segmented LCD and 12 V nominal rail are common. The 5.5 V maximum Vcc accepts a 12 V rail after a small LDO drop, and the integrated LCD controller directly drives the segmented cluster display without an external driver. The industrial -40 to +85C temperature grade covers cabin and most under-hood placements. Designers should still use the ATMEGA329PV-10MUR-AUTOMOTIVE ordering code for AEC-Q100-qualified variants when the application requires it.
Recommended
Educational and Hobby Embedded Projects
The AVR instruction set and huge open-source toolchain (AVR-GCC, Atmel Studio 7, Microchip Studio) make the ATMEGA329PV-10MUR a popular teaching platform for assembly and C embedded courses. Its 32 KB Flash, 2 KB SRAM, 54 I/O, and built-in segmented LCD let students build complete end-to-end projects (alarm clocks, weather stations, games) on a single chip. The QFN-64 package challenges students with surface-mount rework; many educational boards use the TQFP-64 equivalent. Hobby projects in the Arduino-at-heart ecosystem can target AVR-GCC and a JTAG/debugWIRE programmer.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA329PV-10MUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA329PV-10MU | ATMEGA329PA-MUR | ATMEGA329V-8MUR | ATMEGA329A-MUR |
|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 10 MHz | 10 MHz | 20 MHz | 8 MHz | 20 MHz |
| Supply Voltage (Vcc min) | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 2.7 V |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| On-chip LCD Controller | 4x40 segments | 4x40 segments | 4x40 segments | 4x40 segments | 4x40 segments |
| Pico-Power (1.8V capable) | Yes | Yes | Yes | Yes | No |
Key Differentiators
- Only 10 MHz QFN-64 pico-power ATmega329 with industrial -40 to +85C and Tape & Reel (vs ATMEGA329PV-10MU)
- Higher maximum clock speed available in same footprint (vs ATMEGA329PA-MUR)
- Lower Vcc minimum than the non-PV sibling (vs ATMEGA329A-MUR)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor as close as possible to every Vcc and AVcc pin, with a 10 uF bulk capacitor on the main supply. For pico-power battery operation, populate the on-chip LCD charge pump's reservoir capacitors per the datasheet section 5; missing capacitors cause display artifacts and a roughly 20-30 uA increase in active current. Use an LDO with <5 uA quiescent current (e.g. Microchip MCP1700) rather than a switching regulator in metering designs - the converter's quiescent current can exceed the MCU's sleep current.
The 64-pin QFN has an exposed thermal pad (pin 65) which MUST be soldered to a copper pour connected to ground for both thermal and electrical performance. Recommended minimum copper pour is 25 mm x 25 mm of 1 oz copper on the top layer with multiple thermal vias to the inner and bottom layers. Without the thermal pad soldered, junction-to-ambient thermal resistance rises above 100 C/W and the part can throttle at sustained high ambient temperatures.
Route the LCD segment lines adjacent to each other on the PCB to keep their capacitive loading matched - mismatched loads cause visible ghosting on the segmented glass. Place the 32.768 kHz watch crystal within 5 mm of pins 64 (TOSC1) and pin 1 area, with the load capacitors grounded at a single quiet ground return. The JTAG pins (PC2-PC5 in TQFP, equivalent on QFN) should be reserved for ISP/debug and not wired to external pull-ups stronger than 4.7 kohm, otherwise debugWIRE fails to enter programming mode.
Estimated: at 10 MHz, 3.3 V Vcc, and 100% CPU load with peripherals on, typical active current is around 12 mA; budget accordingly for fuse-sourced supply. The ATMEGA329PV-10MUR is specified for 1.8 V minimum at the -10 speed grade; connecting it to a 5 V rail WITHOUT the AVcc-to-Vcc short-circuit pin (LCPU ready) can permanently damage the analog section. Always check that you are using the PV (pico-power) silicon revision when targeting 1.8 V - the older non-PV ATMEGA329A minimum is 2.7 V.
Compliance Information
RoHS and REACH compliance per Microchip product page. Standard ATMEGA329PV-10MUR is not AEC-Q100 qualified - Microchip publishes separate AEC-Q100 ordering codes (ATMEGA329PV-10AUR-AUTOMOTIVE or similar) for automotive customers. Halogen-free per Microchip material declaration.
