ATMEGA325PV-10AUR - 8-bit AVR MCU 32KB 10MHz | Microchip
MPN: ATMEGA325PV-10AUR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.65 | $2.65 |
| 10 | $2.4 | $24.00 |
| 100 | $2.15 | $215.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.76 | $1,760.00 |
ATMEGA325PV-10AUR Overview
An 8-bit microcontroller is an integrated circuit that executes program instructions on 8-bit-wide data words, combining a processor core, program flash, SRAM, EEPROM, and peripherals on a single chip. Within the power-management hierarchy, an MCU sits at the top of an embedded system, supervising sensors, actuators, displays, and communication interfaces. The AVR architecture uses a RISC load/store design with a two-stage pipeline that executes most instructions in a single clock cycle, delivering high MIPS-per-MHz efficiency.
The P suffix in ATMEGA325PV denotes the picoPower technology generation, which reduces power consumption in all sleep modes, while the V suffix indicates a low-voltage operating range down to 1.8V. This makes the device well suited for battery-powered designs where every microamp matters. The 32KB (16K x 16) self-programmable flash supports in-system programming, and the 1KB EEPROM retains calibration and configuration data through power cycles.
Peripheral integration includes a 10-bit ADC, USART, SPI, and two-wire serial interfaces, allowing direct attachment of analog sensors and digital peripherals without external glue logic. The industrial temperature rating supports deployment in uncontrolled environments.
Typical applications include battery-powered metering, handheld instruments, industrial sensor nodes, and consumer appliance control boards where the low 1.8V operation extends battery life.
When designing, budget flash and SRAM carefully: 2KB of SRAM is adequate for state machines and small buffers but not for large frame buffers.
This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA325PV-10AUR — 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 ATMEGA325PV-10AUR (same form factor and footprint) — differing in Package, Supply Voltage Range, Program Memory Size, Operating Temperature, EEPROM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA325PV-10AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA325PA-AUR
✅ Drop-In✓ In Stock
$3.9 / Unit
View Datasheet →ATMEGA325-16AU
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →ATMEGA329PV-10AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA3250V-8AUR
✅ Drop-In✓ In Stock
$3.38 / Unit
View Datasheet →ATMEGA165PV-8AUR
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →ATMEGA325PV-10AUR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-bit |
| Speed | 10 MHz |
| Program Memory Size | 32 KB (16K x 16) FLASH |
| RAM Size | 2 KB |
| EEPROM Size | 1 KB |
| Operating Voltage | 1.8 V to 5.5 V |
| Minimum Supply Voltage | 1.8 V |
| Package / Case | 64-TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Technology Family | picoPower |
| Packaging | Tape & Reel (TR) |
| RoHS Status | Compliant (Green) |
| Product Status | Active |
| Series | ATMEGA325P |
ATMEGA325PV-10AUR 64-tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for ATMEGA325PV-10AUR (64-tqfp (14x14 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 ATMEGA325PV-10AUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA325PV-10AUR is suitable for 6 applications: Battery-Powered Metering, Handheld Industrial Instruments, Industrial Sensor Nodes, Consumer Appliance Control, Building Automation Panels, Legacy AVR Design Maintenance.
Battery-Powered Metering
The ATMEGA325PV-10AUR fits utility water, gas, and energy meters where the device must run for years on a single battery. Its picoPower technology minimizes current in power-down and power-save sleep modes, and the 1.8V minimum supply lets the MCU operate directly from two alkaline cells without a boost converter, eliminating quiescent losses. In a typical topology, the MCU wakes periodically on a watchdog or RTC interrupt, samples flow or voltage via the integrated 10-bit ADC, accumulates readings in the 1KB EEPROM, and drives an LCD or pulses an output. The trade-off is the 10MHz ceiling, ample for metering logic but not for heavy computation.
Recommended
Handheld Industrial Instruments
Portable test tools, calibration devices, and handheld gauges benefit from the ATMEGA325PV-10AUR's combination of 32KB flash for menu-driven firmware, 2KB SRAM for measurement buffers, and an industrial -40C to +85C temperature rating. The 1.8V picoPower operation supports rechargeable Li-ion packs through a simple LDO, while the 10-bit ADC digitizes sensor inputs directly. In use, the MCU scans a keypad, drives a segment LCD, stores calibration constants in EEPROM, and communicates results over UART or SPI to a PC. The 64-TQFP package provides enough I/O for matrix keypads and multiple sensor channels, though a 10MHz core limits fast signal processing.
Recommended
Industrial Sensor Nodes
Wired industrial sensor nodes use the ATMEGA325PV-10AUR as the local acquisition controller. The integrated 10-bit ADC samples 4-20mA-conditioned or ratiometric sensor signals, the USART interfaces to RS-485 transceivers for long cable runs, and the SPI or two-wire interface connects external EEPROM or RTCs. Industrial noise immunity benefits from the AVR core's single-cycle instruction execution and the MCU's brown-out detection for safe restarts. The 64-pin TQFP exposes ample GPIO for valve or relay control alongside sensing. Design consideration: at 5V industrial supplies, the picoPower voltage range gives full headroom, while sleep-mode current stays low for intermittently powered nodes.
Recommended
Consumer Appliance Control
White-goods and small-appliance control boards use the ATMEGA325PV-10AUR to sequence loads, read user interfaces, and monitor temperatures. The 32KB flash accommodates state-machine control logic plus localized UI firmware, 1KB EEPROM stores user preferences across power cycles, and the 10-bit ADC reads NTC thermistors for heater supervision. The industrial temperature grade tolerates the warm environments inside dishwashers and HVAC units, and RoHS/Green compliance meets global appliance regulations. At 10MHz, the AVR handles relay timing and PWM outputs with margin; systems requiring motor FOC control should instead select a 16MHz grade or a dedicated motor-control MCU.
Recommended
Building Automation Panels
Zone controllers and small building-automation panels deploy the ATMEGA325PV-10AUR where moderate I/O count and low standby power are priorities. Its 32 general-purpose I/O lines on the 64-TQFP drive keypad matrices, status LEDs, and damper actuators, while the USART links panels to RS-485 backbone networks. The picoPower sleep modes keep standby consumption low between polling events, extending backup-battery autonomy during mains outages. EEPROM retention preserves setpoints and schedules without external NVRAM. The design trade-off is modest SRAM; keep protocol buffers small or select a pin-compatible family part with more RAM for multi-drop gateways.
Recommended
Legacy AVR Design Maintenance
Production lines maintaining legacy ATmega325-based boards rely on the ATMEGA325PV-10AUR for continuity. Because the part remains active at Microchip with stock at DigiKey, Mouser, and LCSC (over 4,600 pieces reported at one distributor), existing firmware and PCB layouts run unchanged. Drop-in alternatives such as ATMEGA325PV-10AU and ATMEGA325PA-AUR share the identical 64-TQFP footprint, giving second sources within the same family without requalification of the land pattern. This page's cross-reference and pricing data helps procurement teams qualify substitutions quickly when lead times fluctuate, reducing the redesign risk typical of discontinued 8-bit MCUs.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA325PV-10AUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA325PV-10AU | ATMEGA325PA-AUR | ATMEGA325-16AU | ATMEGA329PV-10AU | ATMEGA165PV-8AUR |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 10 MHz | 10 MHz | 20 MHz | 16 MHz | 10 MHz | 8 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 512 B |
| Distinctive Peripheral | Standard ATmega325 peripheral set | Identical | Identical | Identical (older silicon) | Adds LCD segment driver | Smaller memory, LCD on 165 variants |
Key Differentiators
- Lowest-voltage picoPower operation (vs ATMEGA325-16AU)
- Cost-effective 10MHz speed grade (vs ATMEGA325PA-AUR)
- Double the flash of smaller family members (vs ATMEGA165PV-8AUR)
Design Notes
Exploit picoPower sleep modes aggressively in battery designs: power-down mode with watchdog running consumes microamp-level current per Microchip ATmega325P family specifications, while active-mode current scales linearly with clock. Estimated: dropping system clock from 10MHz to 1MHz via the CLKPR register cuts active digital current roughly tenfold, so run fast-then-sleep rather than continuously slow. Enable brown-out detection appropriate to your minimum supply; at 1.8V operation set BOD levels conservatively so flash writes are protected before the cell sags below safe thresholds.
Decouple both VCC and AVCC pins with 100nF ceramic capacitors placed within 5mm of each pin, plus a bulk 10uF on the supply rail. Tie AVCC to VCC through a low-pass LC filter when ADC accuracy matters, keeping analog sensor traces away from the oscillator and switching nodes. The 64-TQFP (14x14 mm) has 0.5mm pin pitch; use a standard QFP-64 land pattern per IPC-7351 guidance and add thermal relief via the center area if a large ground pour is used under the package.
Do not assume all ATmega325 suffixes are interchangeable at the firmware level: the PV (picoPower, 10MHz) and PA (picoPower, 20MHz) grades differ in clock fuse expectations, and the older non-picoPower ATMEGA325-16AU has a different minimum supply specification. Verify CKDIV8 fuse state when migrating, since factory fuse defaults affect the effective 1.8V-safe frequency. Finally, the R suffix means tape-and-reel; tray equivalents (AU ending) exist for prototyping so you avoid whole-reel purchases during development.
Compliance Information
Distributor listings (OnlineComponents) describe the part as RoHS Compliant; FindIC descriptor lists GREEN package status. REACH and conflict-minerals declarations should be confirmed via official Microchip environmental documents.