ATMEGA165PV-8MN - AVR 8-Bit MCU 16KB 8MHz 64-QFN | Microchip
MPN: ATMEGA165PV-8MN β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.87 | $1.87 |
| 10 | $1.78 | $17.80 |
| 100 | $1.62 | $162.00 |
| 500 | $1.48 | $740.00 |
| 1,000 | $1.36 | $1,360.00 |
ATMEGA165PV-8MN Overview
An AVR ATmega microcontroller is an 8-bit RISC microcontroller belonging to the broader microcontroller (MCU) family within the embedded processor and power-management hierarchy. AVR cores execute most of their 131 powerful instructions in a single clock cycle, so an 8MHz AVR delivers roughly the effective throughput of a much faster CISC processor, while remaining fully static for operation down to DC.
Key features include the Advanced RISC architecture with 32 x 8 general-purpose working registers, a built-in segment LCD driver that makes this family a staple of panel-display products, a 10-bit ADC, SPI and USART serial interfaces, and the PicoPower-oriented 'PV' supply range for low-voltage designs. The 'V' suffix denotes a 1.8V-capable supply range, allowing direct operation from two alkaline cells or a single lithium cell.
Technically, the core is fully static with in-system self-programmable flash, enabling boot-loader firmware updates in the field. The memory organization pairs 16KB of flash organized as 8K x 16 with a separate 512B EEPROM for calibration data retention through power cycles.
Typical applications include battery-powered instruments with segment LCDs, home appliances and white goods, metering and thermostats, and industrial control nodes that benefit from the 54 GPIO lines and in-system programmability.
A key design consideration: at 8MHz this '8M' speed grade should be paired with a crystal or internal RC clock, and the QFN thermal pad should be soldered to a grounded copper pour for reliability.
This page synthesizes verified distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA165PV-8MN 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 ATMEGA165PV-8MN (same form factor and footprint) β differing in Operating Temperature, Package.
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Request AlternativesATMEGA165PV-8MN Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Flash Size | 16KB (8K x 16) |
| EEPROM Size | 512B |
| RAM Size | 1K x 8 |
| Package | 64-QFN (9x9 mm) |
| Number of I/O | 54 |
| Architecture | Advanced RISC, 131 instructions, 32 x 8 general purpose registers |
| Peripherals | LCD driver, Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | SPI, UART/USART |
| Operating Temperature | -40C to +85C |
| Mounting Type | Surface Mount |
| Oscillator Type | Internal |
| Green Status | GRN (RoHS-compliant per Mouser listing) |
ATMEGA165PV-8MN Pin Configuration
| Pin 1 | PB0 (SS) β Port B bit 0 / SPI Slave Select |
| Pin 2 | PB1 (SCK) β Port B bit 1 / SPI Serial Clock |
| Pin 3 | PB2 (MOSI) β Port B bit 2 / SPI Master Out |
| Pin 4 | PB3 (MISO) β Port B bit 3 / SPI Master In |
| Pin 5 | PB4 β Port B bit 4 |
| Pin 6 | PB5 β Port B bit 5 |
| Pin 7 | PB6 β Port B bit 6 |
| Pin 8 | PB7 β Port B bit 7 |
| Pin 9 | GND β Ground |
| Pin 10 | VCC β Digital supply voltage |
| Pin 11 | PD0 (SCL) β Port D bit 0 / TWI clock |
| Pin 12 | PD1 (SDA) β Port D bit 1 / TWI data |
| Pin 13 | PD2 β Port D bit 2 |
| Pin 14 | PD3 β Port D bit 3 |
| Pin 15 | PD4 β Port D bit 4 |
| Pin 16 | PD5 β Port D bit 5 |
| Pin 17 | PD6 β Port D bit 6 |
| Pin 18 | PD7 β Port D bit 7 |
| Pin 19 | PE0 β Port E bit 0 |
| Pin 20 | PE1 β Port E bit 1 |
| Pin 21 | PE2 β Port E bit 2 |
| Pin 22 | PE3 β Port E bit 3 |
| Pin 23 | PE4 β Port E bit 4 |
| Pin 24 | PE5 β Port E bit 5 |
| Pin 25 | PE6 β Port E bit 6 |
| Pin 26 | PE7 β Port E bit 7 |
| Pin 27 | GND β Ground |
| Pin 28 | VCC β Digital supply voltage |
| Pin 29 | PC0 β Port C bit 0 / LCD segment driver |
| Pin 30 | PC1 β Port C bit 1 / LCD segment driver |
| Pin 31 | PC2 β Port C bit 2 / LCD segment driver |
| Pin 32 | PC3 β Port C bit 3 / LCD segment driver |
| Pin 33 | PC4 β Port C bit 4 / LCD segment driver |
| Pin 34 | PC5 β Port C bit 5 / LCD segment driver |
| Pin 35 | PC6 β Port C bit 6 / LCD segment driver |
| Pin 36 | PC7 β Port C bit 7 / LCD segment driver |
| Pin 37 | PA0 (ADC0) β Port A bit 0 / ADC input 0 |
| Pin 38 | PA1 (ADC1) β Port A bit 1 / ADC input 1 |
| Pin 39 | PA2 (ADC2) β Port A bit 2 / ADC input 2 |
| Pin 40 | PA3 (ADC3) β Port A bit 3 / ADC input 3 |
| Pin 41 | PA4 (ADC4) β Port A bit 4 / ADC input 4 |
| Pin 42 | PA5 (ADC5) β Port A bit 5 / ADC input 5 |
| Pin 43 | PA6 (ADC6) β Port A bit 6 / ADC input 6 |
| Pin 44 | PA7 (ADC7) β Port A bit 7 / ADC input 7 |
| Pin 45 | GND β Ground |
| Pin 46 | AVCC β Analog supply voltage for ADC |
| Pin 47 | AREF β Analog reference voltage |
| Pin 48 | PF0 β Port F bit 0 / LCD segment driver |
| Pin 49 | PF1 β Port F bit 1 / LCD segment driver |
| Pin 50 | PF2 β Port F bit 2 / LCD segment driver |
| Pin 51 | PF3 β Port F bit 3 / LCD segment driver |
| Pin 52 | PF4 β Port F bit 4 / LCD segment driver |
| Pin 53 | PF5 β Port F bit 5 / LCD segment driver |
| Pin 54 | PF6 β Port F bit 6 / LCD segment driver |
| Pin 55 | PF7 β Port F bit 7 / LCD segment driver |
| Pin 56 | PG4 (TOSC1) β Port G bit 4 / Timer oscillator input |
| Pin 57 | PG3 (TOSC2) β Port G bit 3 / Timer oscillator output |
| Pin 58 | RESET β Reset input (active low) |
| Pin 59 | VCC β Digital supply voltage |
| Pin 60 | GND β Ground |
| Pin 61 | XTAL2 β Crystal oscillator output |
| Pin 62 | XTAL1 β Crystal oscillator input / external clock |
| Pin 63 | PG2 β Port G bit 2 |
| Pin 64 | PG1 β Port G bit 1 |
Typical Applications
ATMEGA165PV-8MN is suitable for 6 applications: Battery-Powered Instruments with LCD, Home Appliances and White Goods, Utility Metering, Industrial Control Nodes, Thermostats and HVAC Controls, Handheld and Portable Devices.
Battery-Powered Instruments with LCD
The ATMEGA165PV-8MN fits battery-powered LCD instruments because it integrates a segment LCD driver alongside the AVR core, eliminating an external display controller and its associated BOM cost and quiescent current. The 16KB flash accommodates measurement, calibration, and UI firmware, while the 1KB SRAM buffers readings and menu state. Because this 'PV' grade supports low-voltage operation, it can run from two alkaline cells through end-of-life discharge. Placing the MCU in sleep between measurements with periodic wake from timer keeps average current in the microamp range, extending battery life to years in a handheld multimeter, panel meter, or environmental data logger.
Recommended
Home Appliances and White Goods
White-goods control boards use the ATMEGA165PV-8MN for its 54 I/O lines, which are enough to drive relays, buttons, LEDs, and an LCD panel from a single controller. The 16KB flash holds wash-cycle state machines, and the brown-out detector plus watchdog timer provide the fault-tolerance appliance safety standards demand. The 8MHz internal-clock option avoids an external crystal on cost-sensitive boards, while the SPI and USART interfaces link the MCU to touch panels or motor drivers. Its wide operating temperature range of -40C to +85C covers kitchen and laundry environments near heating elements.
Recommended
Utility Metering
Electricity, water, and gas meters benefit from the ATMEGA165PV-8MN's combination of an LCD driver, 512B EEPROM for billing data retention, and low-power sleep modes. The EEPROM stores calibration constants and accumulated consumption across power cycles without external memory. The 10-bit-class analog inputs sample front-end signals, and the USART supports communication with AMR/AMI modules. Because meter PCBs run for decades, the fully static AVR core and in-system programmable flash allow field firmware updates through a boot loader, an important lifecycle consideration for deployed metering fleets.
Recommended
Industrial Control Nodes
In industrial automation, the ATMEGA165PV-8MN serves as a distributed I/O and control node: 54 GPIO lines drive sensors, actuators, and status indicators, while the SPI and USART ports connect to fieldbus bridges. The -40C to +85C temperature range and brown-out protection suit electrically noisy factory floors, and the watchdog timer supports automatic recovery from latch-ups. The in-system programmable flash permits firmware rollouts without desoldering the device, and the LCD driver enables local status displays on machine control panels, reducing wiring back to a central HMI.
Recommended
Thermostats and HVAC Controls
Thermostat designs use the ATMEGA165PV-8MN for its LCD driver, generous GPIO for relay outputs and keypad scanning, and low-power standby. The 16KB flash stores PID control loops and scheduling firmware, while the EEPROM retains setpoints and schedules through power interruptions. Running from a 24VAC-derived low-voltage rail or battery backup, the MCU spends most of its time in power-down sleep and wakes on RTC interrupt to update the display. The QFN package's exposed pad gives a robust thermal and mechanical connection suitable for wall-mounted enclosures with limited airflow.
Recommended
Handheld and Portable Devices
Portable, hand-held products choose the ATMEGA165PV-8MN because its 'PV' supply capability allows operation directly from two alkaline cells, and its integrated LCD driver displays status without a companion display IC. The 8MHz grade balances processing power against dynamic current, and sleep modes drop consumption to microamp levels between user interactions. The 64-QFN 9x9 mm package conserves PCB area in compact enclosures, and 54 I/O lines handle keypads, buzzer, backlight, and peripheral chips simultaneously - tasks that would otherwise demand multiple smaller MCUs and more board space.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA165PV-8MN β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA165PV-8MUR | ATMEGA165A-MUR | ATMEGA165P-16MU | ATMEGA325A-MN |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Size | 16KB (8K x 16) | 16KB | 16KB | 16KB | 32KB |
| EEPROM | 512B | 512B | 512B | 512B | 1KB |
| SRAM | 1KB | 1KB | 1KB | 1KB | 2KB |
| LCD Driver | Yes | Yes | Yes | Yes | Yes |
| Low-Voltage (PV) Grade | Yes | Yes | No (standard grade) | No (P grade) | No (A grade) |
Key Differentiators
- Low-voltage 'PV' grade operation (vs ATMEGA165A-MUR)
- Double the program memory on the same footprint (vs ATMEGA325A-MN)
- Higher clock speed option (vs ATMEGA165P-16MU)
Design Notes
The 64-QFN (9x9) MLF package requires the exposed center pad to be soldered to a grounded copper pour on the PCB. Microchip application guidance for MLF packages recommends a via array (typically 4-9 vias) under the pad connecting to the ground plane, both for mechanical reliability and for heat spreading. Omitting the pad connection is a common cause of intermittent resets and poor EMC performance. Define the land pattern per the datasheet MLF outline dimensions with slightly elongated side pads to wick excess solder and prevent bridging between the 0.5mm-pitch leads.
Decouple every VCC/AVCC pin pair with 100nF ceramic capacitors placed within 5mm of the pins, plus one bulk 4.7-10uF capacitor near the supply entry. AVCC (pin 46) must be connected to VCC through a low-pass LC filter (e.g., 10uH + 100nF) when ADC accuracy matters, and AREF should be decoupled to GND with a 100nF capacitor - never connect AREF directly to a supply rail without series resistance when the internal reference is selected, as this can short the reference amplifier output.
This is an 8MHz speed grade ('8M' suffix): do not clock it above 8MHz or timing and flash write reliability are no longer guaranteed. When using the built-in LCD driver, note that LCD segment pins are multiplexed with general-purpose ports - firmware must configure the LCDCR registers before using those pins, or pins may float in a state that draws excess current. Also confirm the RESET pin is not left floating; enable the internal brown-out detector fuse so supply droops during battery discharge do not corrupt EEPROM writes.
Compliance Information
DigiKey listing describes the part as GRN (green/RoHS-compliant). AEC-Q100 not applicable for this general-purpose ATmega part. REACH and conflict mineral status not stated in provided data.
