ATMEGA165PV-8MU - 8MHz AVR MCU 16KB Flash 64-QFN | Microchip
MPN： ATMEGA165PV-8MU ✓ 啟用中ATMEGA165PV-8MU 概覽
An AVR microcontroller is a modified Harvard-architecture RISC processor that fetches instructions from Flash and data from SRAM in a single cycle. Within the power-management hierarchy, the ATmega family sits in the 8-bit MCU class, positioned for embedded control nodes that must combine real-time responsiveness with very low sleep currents. The ATmega165P variant integrates Flash, EEPROM, SRAM, peripherals, and a brown-out detector on one die.
Key features include an advanced RISC core executing 133 powerful instructions, most in a single clock cycle, giving throughput approaching 1 MIPS per MHz. On-chip 512B EEPROM and 1KB SRAM support parameter storage and working data without external memory. In-System Programming and self-programming Flash simplify field updates. The wide 2.7V to 5.5V supply range allows direct operation from a 3.3V or 5V rail, and the exposed-pad QFN improves heat dissipation and grounding.
Technically, the device pairs the AVR ALU with a single-level pipeline, so a large share of instructions complete in one clock, keeping interrupt latency short and deterministic. Peripherals such as timers, serial interfaces, and an ADC share the bus with the core, letting firmware trade speed against power by scaling the 8 MHz clock and sleep modes.
Typical applications include industrial sensors and actuators, battery-powered metering, home automation and IoT nodes, and small HMI or LCD front-end boards where a mid-density AVR with ample I/O is needed.
A key design consideration: guarantee the supply stays above 2.7V at full clock speed, or drop the clock frequency when operating at lower voltages per the AVR frequency-versus-voltage curve.
This page adds value beyond the datasheet by consolidating verified distributor pricing, stock levels, drop-in alternatives, and practical design notes in one place.
直接替換替代品，適用於 ATMEGA165PV-8MU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA165PV-8MU （相同外形與佔位） — 差異在於 Package, EEPROM, EEPROM Size, Packaging, Program Memory Size.
ATMEGA169PV-8MU
✅ 直接替換📋 參考替代品（不在目錄中）
ATMEGA325A-MN
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA325PV-10MUR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA1281V-8MU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA1281-16MUR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA165PV-8MU 最大額定值與電氣特性
| Core Architecture | AVR 8-bit RISC |
| 資料匯流排寬度 | 8 Bit |
| Clock Speed | 8 MHz |
| Program Memory Size | 16KB (8K x 16) Flash |
| EEPROM Size | 512 B |
| SRAM Size | 1 KB |
| 供應電壓 | 2.7 V to 5.5 V |
| I/O Ports | 53 |
| Instruction Set | 133 powerful instructions, most single-cycle |
| Throughput | Up to 1 MIPS per MHz |
| Package Type | 64-QFN / VFQFN (9 x 9 mm), exposed pad |
| 安裝類型 | Surface Mount |
| Programmability | In-System Programmable (ISP) Flash |
| 生命週期狀態 | Active |
ATMEGA165PV-8MU 64-qfn / vfqfn (9 x 9 mm), exposed pad 腳位配置指南
ATMEGA165PV-8MU（64-qfn / vfqfn (9 x 9 mm), exposed pad 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA165PV-8MU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA165PV-8MU 適用於 6 應用s: Industrial Sensor and Actuator Nodes, Battery-Powered Metering, Home Automation and IoT End Nodes, HMI and Front-Panel Controllers, Embedded Test and Measurement Fixtures, Automotive Body and Comfort Electronics (Non-Safety).
Industrial Sensor and Actuator Nodes
The ATMEGA165PV-8MU fits industrial sensor and actuator nodes because its 53 I/O lines provide enough GPIO for address selection, limit switches, and driver control without port expanders, while the 2.7V to 5.5V supply range tolerates noisy 5V industrial rails. The AVR core's deterministic single-cycle execution keeps control loops and interrupt responses predictable at 8 MHz. On-chip 512B EEPROM stores calibration constants across power cycles, and the 16KB self-programmable Flash supports field firmware updates over a serial link. Its 64-QFN exposed-pad package grounds solidly to the PCB, improving noise immunity near relays and motor drivers.
推薦
Battery-Powered Metering
For electricity, water, and heat meters, the ATMEGA165PV-8MU offers the low-power AVR picoPower-class P-variant behavior: firmware can stay in sleep modes most of the time and wake briefly on interrupts, while 1 MIPS-per-MHz throughput completes measurement tasks quickly before returning to sleep. The 2.7V floor suits three-cell alkaline or LiFePO4 stacks, and 512B EEPROM retains accumulated billing registers without external nonvolatile memory. The 8 MHz speed grade keeps dynamic current modest compared with faster grades, and the single-die integration of ADC, timers, and serial interfaces reduces bill-of-materials count for cost-sensitive meter platforms.
推薦
Home Automation and IoT End Nodes
Smart-home sensor and relay modules benefit from the ATMEGA165PV-8MU's combination of generous I/O, 5V tolerance headroom, and serial peripherals for connecting RF or RS-485 modules. The 8 MHz clock is sufficient for protocol stacks such as MODBUS or proprietary 433 MHz meshes implemented in firmware, and the 16KB Flash holds protocol code plus a small bootloader for over-the-air-style updates via a host gateway. The wide supply range allows direct operation from mains-derived 5V supplies without a precision regulator, and the QFN package's small 9x9 mm footprint suits compact wall-mounted enclosures.
推薦
HMI and Front-Panel Controllers
Front-panel control boards - keypads, encoders, indicator LEDs, and small displays - map naturally onto the ATMEGA165PV-8MU because 53 I/O lines scan large key matrices and drive multiplexed indicators without external logic. The AVR's fast, deterministic interrupt handling debounces keys and refreshes displays at precise timing intervals, while the on-chip EEPROM stores user settings such as brightness and presets. The 64-QFN exposed pad simplifies the ground plane needed for EMC near touch or capacitive sensing circuitry, and the 2.7V to 5.5V range matches both 3.3V logic networks and legacy 5V panel supplies.
推薦
Embedded Test and Measurement Fixtures
Bench and production-line test fixtures use the ATMEGA165PV-8MU as a stimulus/response controller: timers generate precise pulses, the serial interfaces talk to the host PC, and the ample GPIO drives relays and reads DUT status lines. Single-cycle instruction execution gives microsecond-accurate bit-banged timing for protocols such as 1-Wire, I2C, and SPI target emulation. The 16KB Flash accommodates multiple fixture test scripts selected at runtime, and 512B EEPROM keeps calibration and fixture-serial data across retooling. The 9x9 mm QFN fits the controller section of dense fixture boards alongside level-shift and relay-driver circuitry.
推薦
Automotive Body and Comfort Electronics (Non-Safety)
In non-safety automotive comfort modules - seat adjustment, lighting, mirror control - the ATMEGA165PV-8MU's 2.7V to 5.5V range rides through load-dump-filtered 5V rails, and its 53 I/O lines handle switch matrices, door-lock drivers, and LIN-style UART communication implemented in firmware. The AVR's brown-out detection and reset controller keep execution safe during cranking voltage dips. The 9x9 mm exposed-pad QFN withstands thermal cycling on standard FR-4 with an adequate ground pour. Designers should confirm the required automotive qualification grade separately, since the standard commercial ATmega165PV is not the AEC-Q100 variant.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA165PV-8MU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA169PV-8MU | ATMEGA325A-MN | ATMEGA1281V-8MU |
|---|---|---|---|---|
| Package | 64-QFN (9x9 mm), exposed pad | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-MLF (9x9 mm) - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16KB (8K x 16) | 16KB | 32KB | 128KB |
| Distinct Feature | General-purpose mid-density AVR | Integrated LCD controller | Doubled Flash in same footprint | 8x Flash, 8x SRAM, extended interfaces |
主要差異化特點
- General-purpose peripheral mix without LCD overhead (對比ATMEGA169PV-8MU)
- Lowest cost-per-Flash-KB entry in the 64-pin family (對比ATMEGA325A-MN)
- Right-sized memory for cost-sensitive designs (對比ATMEGA1281V-8MU)
設計說明
The ATMEGA165PV-8MU specifies a 2.7V to 5.5V supply. If your rail is 3.3V nominal, budget for brown-out during transients: configure the on-chip brown-out detector to a threshold consistent with the AVR frequency-versus-voltage curve, and never run the 8 MHz grade below the datasheet minimum voltage for that frequency. Decouple each VCC pin with 100nF ceramic capacitors placed within a few millimeters of the pins, plus one bulk 4.7uF to 10uF capacitor near the device.
The 64-QFN exposed pad must be soldered to a grounded thermal pad on the PCB. Create a via array (typically a 3x3 or 4x4 grid of 0.3mm vias) under the pad connecting to the internal ground plane - this anchors the die and provides the low-inductance ground return the AVR needs for clean clock operation. Use a solder-mask-defined aperture with a slight reduction on the via openings to prevent solder wicking that would lift the package during reflow.
Migrating to a pin-compatible sibling (ATmega325/ATmega1281) is not firmware-transparent: register addresses, peripheral counts, and signature bytes differ. Always recompile with the correct device selection and revalidate ISP fuses, especially the clock-source and brown-out fuse bytes. Also verify RESET pin configuration - if used as a GPIO, in-system programming is disabled unless a high-voltage programmer is available. Design an ISP header on every production board.
合規資訊
RoHS/REACH/lead-free status not explicitly stated in the reviewed distributor listings; confirm on the official Microchip product page or request a compliance certificate. FindIC describes related family parts as GREEN packaging.
