ATMEGA325PV-10MU - AVR 8-bit MCU 32KB 10MHz 64-QFN | Microchip
MPN: ATMEGA325PV-10MU β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.19 | $2,190.00 |
ATMEGA325PV-10MU Overview
An 8-bit microcontroller is a single-chip computing device that integrates a processor core, program memory, data memory, and peripherals such as timers, UART, SPI, and ADC on one silicon die. The ATmega325P belongs to the AVR ATmega family, itself a subcategory of the broader 8-bit MCU / embedded processor hierarchy within Microchip's microcontroller portfolio, positioned for cost-sensitive embedded control.
Key features include the AVR enhanced RISC architecture executing 131 powerful instructions, most in a single clock cycle; 32 general purpose I/O lines across 4 ports; and low-power picoPower-class operation. The device integrates an 8-channel 10-bit ADC, USART, SPI serial interface, and JTAG boundary-scan/debug capability per the AVR ATmega family datasheet.
Architecturally, the ATmega325P uses a Harvard structure with separate program and data buses, allowing single-cycle instruction fetch while the previous instruction executes. The 32 x 8 general purpose register file is directly connected to the ALU, giving effective single-cycle throughput near 10 MIPS at 10 MHz. In-system self-programmable Flash enables field firmware updates.
Typical applications include industrial control panels, consumer appliances, battery-powered instruments, and sensor front-ends where a 64-pin footprint, 32KB program memory, and industrial temperature grade are required.
Design consideration: the 64-QFN exposed pad must be soldered to a ground plane for thermal and signal-integrity performance; verify voltage-frequency derating below 5.5V against the speed grade.
This page synthesizes distributor data, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA325PV-10MU β 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-10MU (same form factor and footprint) β differing in Package, RoHS Status, Number of I/O, Connectivity, Maximum Clock Frequency.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA325PA-MUR
β Drop-Inβ In Stock
$1.65 / Unit
View Datasheet βATMEGA325P-20MUR
β Drop-Inβ In Stock
$2.86 / Unit
View Datasheet βATMEGA325V-8MU
β Drop-Inβ In Stock
$3.9 / Unit
View Datasheet βATMEGA3250PA-AUR
β Drop-Inβ In Stock
$2.98 / Unit
View Datasheet βATMEGA324PV-10MU
β Drop-Inβ In Stock
$5.98 / Unit
View Datasheet βATMEGA325PA-AUR
β Drop-Inβ In Stock
$3.9 / Unit
View Datasheet βATMEGA325PV-10MU Maximum Ratings & Electrical Characteristics
| Core | AVR 8-bit RISC |
| Program Memory Size | 32 KB (16K x 16) Flash |
| RAM Size | 2 KB |
| EEPROM Size | 1 KB |
| Maximum Clock Frequency | 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 54 (32 I/O ports listed in legacy datasheet summary) |
| Package | 64-QFN (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial |
| Series | AVR ATmega ATmega325P |
| ADC | 10-bit (ATmega325P family) |
| Interfaces | USART, SPI, JTAG |
| Instruction Set | 131 powerful instructions, most single-cycle |
| Package Code (JEDEC) | HVQCCN, square, no-lead |
| Package Body | 10 x 10 mm, 1 mm height, 0.80 mm pitch (legacy summary) |
| Lifecycle Stage | ACTIVE |
| RoHS Status | unknown |
ATMEGA325PV-10MU 10 x 10 mm, 1 mm height, 0.80 mm pitch (legacy summary) Pin Configuration Guide
Pin configuration for ATMEGA325PV-10MU (10 x 10 mm, 1 mm height, 0.80 mm pitch (legacy summary) 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-10MU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA325PV-10MU is suitable for 6 applications: Industrial Control Panels, Battery-Powered Instruments, Sensor Front-End Data Acquisition, Consumer Appliance Control, Communication Nodes and Gateways, Legacy AVR System Maintenance.
Industrial Control Panels
The ATMEGA325PV-10MU fits industrial control and HMI panel designs where its 54 general purpose I/O lines, 10-bit ADC, and industrial temperature grade cover switch, sensor, and actuator interfacing. Its 32KB Flash accommodates menu-driven firmware and communication stacks, while the AVR single-cycle instruction architecture delivers roughly 10 MIPS at 10 MHz for deterministic scanning loops. Placed on a 64-QFN footprint with the exposed pad grounded through thermal vias, the MCU provides robust ground integrity for ADC measurements in electrically noisy cabinets. The wide 1.8V-5.5V supply range tolerates unregulated logic rails derived from industrial 24V systems via simple buck regulators.
Recommended
Battery-Powered Instruments
With a 1.8V to 5.5V operating range and AVR power-down and power-save sleep modes, the ATMEGA325PV-10MU supports portable measurement instruments running from two or three cells. Its 2KB SRAM buffers sampled data from the integrated 10-bit ADC, and the 1KB EEPROM stores calibration constants without external memory. Designers should note the picoPower ATMEGA325PA-MU is pin-compatible and offers lower sleep current, making it the preferred choice when the sleep budget dominates battery life; the 325PV remains valid where an existing footprint or code base is reused and the 10 MHz ceiling suffices.
Recommended
Sensor Front-End Data Acquisition
The integrated 10-bit ADC of the ATmega325P family, combined with single-cycle AVR instruction execution, makes the ATMEGA325PV-10MU suitable for sensor acquisition nodes handling temperature, pressure, and level signals. Four 8-bit I/O ports drive multiplexers and status indication, while the USART links nodes to a supervisory controller or RS-485 transceiver. Running the ADC from a clean AVcc supply with 100nF decoupling per supply pin preserves effective-number-of-bits performance. The 64-QFN exposed pad should be tied to a solid ground plane to minimize ground bounce between analog and digital domains.
Recommended
Consumer Appliance Control
In washing machines, cookers, and HVAC wall controls, the ATMEGA325PV-10MU provides sufficient 32KB Flash for button matrices, display multiplexing, and safety interlock logic, while the AVR RISC core keeps loop timing predictable. The 64-pin count covers keypad scanning plus relay and triac drive lines without port expanders, lowering system cost. The industrial temperature grade adds margin for enclosures near heat sources. In-system programmable Flash permits firmware updates at end-of-line programming stations through the SPI ISP interface, streamlining manufacturing and field service.
Recommended
Communication Nodes and Gateways
The USART and SPI interfaces of the ATMEGA325PV-10MU enable serial gateway and fieldbus node designs, bridging RS-232/RS-485 links to local sensors. At 10 MHz the AVR core sustains buffered UART throughput with ample headroom for protocol parsing in the 2KB SRAM. JTAG support provides boundary scan for production board test and on-chip debug during development, an advantage over smaller pin-count family members. Designers needing higher speed can drop in the 20 MHz ATMEGA325P-20MUR on the identical footprint, tripling effective MIPS without a PCB respin.
Recommended
Legacy AVR System Maintenance
For boards designed around the original Atmel ATmega325P silicon, the ATMEGA325PV-10MU serves as a maintenance spare and production continuation part, since lifecycle status remains ACTIVE and multiple distributors (DigiKey, Mouser, Newark, Hotenda) stock it. Keeping the same package, register map, and speed grade guarantees firmware and fixture compatibility with existing ATE. Where systems are redesigned, migrating to the pin-compatible picoPower ATMEGA325PA extends longevity and cuts power, but pure repair-and-replace scenarios benefit most from ordering the identical MPN to avoid any requalification.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA325PV-10MU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA325PA-MUR | ATMEGA325P-20MUR | ATMEGA325V-8MU | ATMEGA324PV-10MU |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm), exposed pad | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 10 MHz | 20 MHz | 20 MHz | 8 MHz | 10 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V (20 MHz operation) | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Low-Power Features | Standard AVR sleep modes | picoPower enhanced sleep modes | Standard AVR sleep modes | Standard AVR sleep modes | Standard AVR sleep modes |
| Peripheral Set | ATmega325 peripheral allocation | Same as ATmega325 | Same as ATmega325 | Same as ATmega325 | ATmega324 allocation (differs - firmware re-verify) |
| Automotive Qualification | No (industrial grade) | No | No | No | No |
Key Differentiators
- Low-voltage 10 MHz V-grade operation (vs ATMEGA325P-20MUR)
- Lower unit cost than picoPower successor (vs ATMEGA325PA-MUR)
- Identical family compatibility (vs ATMEGA324PV-10MU)
Design Notes
The 64-QFN exposed pad is the main ground return. Create a PCB landing pad approximately matching the pad dimensions, with a 5x5 (or larger) array of 0.3 mm vias to the ground plane to wick solder during reflow. Insufficient exposed-pad soldering is the most common field failure for QFN AVRs, manifesting as ADC noise and intermittent resets. Follow the IPC-recommended QFN land pattern and verify stencil apertures (typically 60-70% coverage) before production.
Decouple every VCC/AVCC pin pair with 100 nF ceramic capacitors placed within 2 mm of the pins, plus one bulk 4.7-10 uF capacitor near the supply entry. Tie AVCC to VCC through an LC or RC filter when ADC accuracy matters. Remember the V speed grade derates maximum clock at low supply voltage - consult the datasheet voltage-frequency curve; running 10 MHz below about 2.7V can exceed the safe operating region.
Do not assume all 64-QFN ATmega variants share the same register map: the ATmega324 and ATmega325 families differ in peripheral allocation, so code compiled for a 324 will not run unchanged on a 325. Also, the JTAG interface is enabled by default in shipped devices and consumes four port pins (PC2-PC5); disable JTAG via fuse if those I/O are needed in the application.
Compliance Information
Compliance data was not present in the provided verified web data; confirm RoHS/REACH status on the Microchip product page before procurement. The ATMEGA325PA-AUR variant is the automotive-qualified family option.
