ATMEGA165PV-8AU - AVR 8-bit MCU 8MHz 16KB Flash | Microchip
MPN: ATMEGA165PV-8AU ✓ Hoạt độngATMEGA165PV-8AU Tóm tắt
A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die, sitting at the device level of the embedded-systems hierarchy below system-on-chip (SoC) and above simple logic ICs. The AVR family popularized the modified Harvard RISC architecture with single-cycle instruction execution, and this device belongs to the ATmega product line, itself a member of the broader 8-bit microcontroller category that also includes the PIC and 8051 families.
Key features of the ATMEGA165PV-8AU include the picoPower-qualified P variant silicon, which supports operating voltages from 2.5V to 5.5V and low idle/power-down current for battery-powered designs. Peripherals comprise two 8-bit timers and two 16-bit timers with PWM channels, an 8-channel 10-bit ADC with internal bandgap reference, a universal synchronous/asynchronous receiver-transmitter (USART), a two-wire interface (TWI, I2C-compatible), an SPI serial port, an on-chip JTAG debug/programming interface with boundary scan, and an analog comparator.
Architecturally, the AVR core executes most instructions in a single clock cycle through a two-stage pipeline, achieving close to 1 MIPS per MHz. The 16KB FLASH sustains at least 10,000 write/erase cycles, the 512B EEPROM sustains 100,000 cycles, and in-system programming (ISP) via the SPI allows firmware updates after board assembly.
Typical applications include industrial control panels and sensors, HVAC and appliance control, LCD-based instrumentation (the family includes an integrated LCD controller variant lineage), and battery-powered metering where the wide 2.5V-5.5V supply range and low-power sleep modes matter.
For design, remember that the ADC reference can be AVCC, an internal 1.1V bandgap, or AREF, and VCC/AVCC must be decoupled with 100nF ceramics placed close to each supply pin group on the TQFP-64.
This page synthesizes distributor availability, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet; pricing references are as of 2026-09-16.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA165PV-8AU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATMEGA165PV-8AU (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Instruction Set, Operating Temperature, Communication Interfaces.
ATMEGA165PA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA165A-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA325PV-8AU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATMEGA325P-8AU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATMEGA165PV-8AU Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit AVR RISC |
| Flash Memory | 16 KB (8K x 16) In-System Programmable |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Tần số xung maksimum | 8 MHz |
| Operating Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 54 |
| ADC Resolution | 10-bit |
| ADC Channels | 8 |
| Timers/Counters | 2 x 8-bit, 2 x 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C-compatible) |
| Debug Interface | JTAG (debug + boundary scan) |
| Hộp | 64-TQFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Low Power Variant | Yes (P-series picoPower silicon) |
| Flash Endurance | 10,000 write/erase cycles |
| EEPROM Endurance | 100,000 write/erase cycles |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATMEGA165PV-8AU
| Chân 1 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| Chân 2 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| Chân 3 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| Chân 4 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| Chân 5 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| Chân 6 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| Chân 7 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| Chân 8 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| Chân 9 | VCC — Digital supply voltage |
| Chân 10 | GND — Ground |
| Chân 11 | PB0 (SS) — Port B bit 0 / SPI slave select |
| Chân 12 | PB1 (SCK) — Port B bit 1 / SPI clock |
| Chân 13 | PB2 (MOSI) — Port B bit 2 / SPI master out |
| Chân 14 | PB3 (MISO) — Port B bit 3 / SPI master in |
| Chân 15 | PB4 (OC0) — Port B bit 4 / Timer0 output compare |
| Chân 16 | PB5 (OC1A) — Port B bit 5 / Timer1 output compare A |
| Chân 17 | PB6 (OC1B) — Port B bit 6 / Timer1 output compare B |
| Chân 18 | PB7 (OC2) — Port B bit 7 / Timer2 output compare |
| Chân 19 | PE0 (RXD0) — Port E bit 0 / USART receive |
| Chân 20 | PE1 (TXD0) — Port E bit 1 / USART transmit |
| Chân 21 | PE2 (XCK0) — Port E bit 2 / USART external clock |
| Chân 22 | PE3 (OC3A) — Port E bit 3 / Timer3 output compare A |
| Chân 23 | PE4 (OC3B) — Port E bit 4 / Timer3 output compare B |
| Chân 24 | PE5 (OC3C) — Port E bit 5 / Timer3 output compare C |
| Chân 25 | PE6 (T3) — Port E bit 6 / Timer3 external clock input |
| Chân 26 | PE7 (ICP3) — Port E bit 7 / Timer3 input capture |
| Chân 27 | PC0 — Port C bit 0 |
| Chân 28 | PC1 — Port C bit 1 |
| Chân 29 | PC2 — Port C bit 2 |
| Chân 30 | PC3 — Port C bit 3 |
| Chân 31 | PC4 — Port C bit 4 |
| Chân 32 | PC5 — Port C bit 5 |
| Chân 33 | PC6 — Port C bit 6 |
| Chân 34 | PC7 — Port C bit 7 |
| Chân 35 | VCC — Digital supply voltage |
| Chân 36 | GND — Ground |
| Chân 37 | PD0 (SCL) — Port D bit 0 / TWI clock |
| Chân 38 | PD1 (SDA) — Port D bit 1 / TWI data |
| Chân 39 | PD2 (RXD1) — Port D bit 2 / USART1 receive |
| Chân 40 | PD3 (TXD1) — Port D bit 3 / USART1 transmit |
| Chân 41 | PD4 (ICP1) — Port D bit 4 / Timer1 input capture |
| Chân 42 | PD5 (OC1A) — Port D bit 5 / Timer1 output compare A |
| Chân 43 | PD6 (OC1B) — Port D bit 6 / Timer1 output compare B |
| Chân 44 | PD7 (OC2) — Port D bit 7 / Timer2 output compare |
| Chân 45 | RESET — Active-low reset input |
| Chân 46 | XTAL1 — Oscillator input |
| Chân 47 | XTAL2 — Oscillator output |
| Chân 48 | PG0 — Port G bit 0 |
| Chân 49 | PG1 — Port G bit 1 |
| Chân 50 | PG2 — Port G bit 2 |
| Chân 51 | PG3 (TOSC2) — Port G bit 3 / RTC oscillator output |
| Chân 52 | PG4 (TOSC1) — Port G bit 4 / RTC oscillator input |
| Chân 53 | PG5 (OC0B) — Port G bit 5 / Timer0 output compare B |
| Chân 54 | AVCC — ADC supply voltage |
| Chân 55 | AREF — ADC reference voltage |
| Chân 56 | GND — Ground |
| Chân 57 | PF0 (ADC0) — Port F bit 0 / ADC channel 0 |
| Chân 58 | PF1 (ADC1) — Port F bit 1 / ADC channel 1 |
| Chân 59 | PF2 (ADC2) — Port F bit 2 / ADC channel 2 |
| Chân 60 | PF3 (ADC3) — Port F bit 3 / ADC channel 3 |
| Chân 61 | PF4 (ADC4/TCK) — Port F bit 4 / ADC channel 4 / JTAG test clock |
| Chân 62 | PF5 (ADC5/TMS) — Port F bit 5 / ADC channel 5 / JTAG test mode select |
| Chân 63 | PF6 (ADC6/TDO) — Port F bit 6 / ADC channel 6 / JTAG test data out |
| Chân 64 | PF7 (ADC7/TDI) — Port F bit 7 / ADC channel 7 / JTAG test data in |
Ứng dụng tiêu biểu
ATMEGA165PV-8AU phù hợp cho 6 Áp dụngs: Industrial Control Panels, HVAC and Appliance Control, Battery-Powered Metering, Human-Machine Interfaces and LCD Panels, Sensor Nodes and Data Loggers, Legacy Embedded Maintenance and Replacement.
Industrial Control Panels
Factory automation nodes, motor-start logic, and machine-state controllers benefit from the ATMEGA165PV-8AU's 54 GPIO lines, which drive relays, indicators, and optocoupled inputs without port expanders. The 5V-tolerant 2.5V-5.5V supply range allows direct operation from industrial 5V rails, while the 10-bit, 8-channel ADC reads potentiometers, current-shunt amplifiers, and temperature sensors at up to roughly 15 kSPS. In-system programmable 16KB FLASH permits field firmware updates over an existing SPI or UART link, and the JTAG interface enables boundary-scan test of assembled panels. Deep power-down modes keep standby current low between duty cycles.
Được đề xuất
HVAC and Appliance Control
Heating, ventilation, and white-goods controllers use the ATMEGA165PV-8AU to sequence fans, compressors, and dampers while monitoring NTC thermistors through its 8-channel 10-bit ADC and internal 1.1V bandgap reference. The four timers (two 8-bit, two 16-bit) generate PWM for triac or FAN drive with hardware support, offloading the AVR RISC core that executes close to 1 MIPS per MHz at 8MHz. The 512B EEPROM stores calibration and user settings across power cycles with 100,000-cycle endurance. Its wide 2.5V-5.5V supply tolerance rides through brownout events when paired with a supervisor, and ISP FLASH simplifies last-mile firmware fixes.
Được đề xuất
Battery-Powered Metering
Utility submeters and portable gauges exploit the P-series picoPower silicon of the ATMEGA165PV-8AU, whose idle and power-down modes stretch battery life in always-on counting applications. The AVR wakes on pin-change or timer interrupts, samples shunt or Hall-effect current signals with the 10-bit ADC, and accumulates readings in 512B of nonvolatile EEPROM before returning to sleep. Operation from 2.5V allows running directly from two alkaline cells or a single lithium cell through a low-cost LDO, while the 1KB SRAM buffers accumulation variables. The TWI interface reads external RTCs and energy-metering front ends over I2C.
Được đề xuất
Human-Machine Interfaces and LCD Panels
Keypad-and-display control boards fit naturally on the ATMEGA165PV-8AU: its ATmega family lineage includes LCD-controller variants, and this device's many port lines drive multiplexed segment LCDs, character modules, or LED arrays directly. The USART connects to touchscreen controllers or a host PC, the TWI bus reads I2C expanders and EEPROMs, and the SPI port drives graphic LCD controllers at hardware speed. JTAG supports in-circuit debugging of menu logic during development and boundary-scan inspection of densely populated HMI boards. The 8MHz clock provides ample headroom for debounce scanning, display refresh, and communication stacks concurrently.
Được đề xuất
Sensor Nodes and Data Loggers
Distributed sensor nodes use the ATMEGA165PV-8AU as the acquisition and logging engine: the 8-channel 10-bit ADC digitizes analog sensors, the USART streams records to a radio or RS-485 transceiver, and SPI moves data to FLASH or SD-card front ends. Sampling routines triggered by timer interrupts deliver deterministic intervals, while the analog comparator provides zero-cross or threshold wake-up without ADC conversion. The 1KB SRAM organizes burst buffers, and EEPROM retains configuration across field swaps. Because the AVR core executes most instructions in one cycle, modest filtering and scaling mathematics complete within tight energy budgets between sleep intervals.
Được đề xuất
Legacy Embedded Maintenance and Replacement
Boards designed around the original ATmega165 continue in service in test equipment, medical accessories, and retrofit controllers. The ATMEGA165PV-8AU serves as the service-replacement part: it shares the 64-TQFP footprint and firmware image format with earlier family members, so existing HEX files program directly over ISP without recompilation in most cases. Rochester Electronics continues distributing the part through the DigiKey Marketplace, providing long-term supply beyond normal channel stock. Engineering teams standardizing replacements should qualify the pin-compatible ATMEGA165PA-AU in parallel to guarantee availability for the next decade of repairs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA165PV-8AU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATMEGA165PA-AU | ATMEGA165A-AU | ATMEGA325PV-8AU |
|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB |
| EEPROM | 512 B | 512 B | 512 B | 1 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Operating Voltage | 2.5 V to 5.5 V | 1.8 V to 5.5 V (extended low-voltage) | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Power Profile | P-series picoPower | picoPower (lower active/sleep current) | standard | P-series picoPower |
| Pin Compatibility | Reference (64-pin TQFP) | Pin-to-pin compatible | Pin-to-pin compatible | Pin-to-pin compatible (same family footprint) |
Bảo phân biệt quan trọng
- Wide low-voltage operating window for battery designs (vsATMEGA325P-8AU)
- Lower power than the standard-silicon sibling (vsATMEGA165A-AU)
- Flash-limited versus same-footprint upgrade (vsATMEGA325PV-8AU)
Ghi chú thiết kế
The 64-TQFP has multiple VCC and GND pairs (two shared groups plus AVCC); each supply pair needs a 100nF X7R ceramic placed within 3-5 mm of the pins, plus one bulk 4.7-10uF capacitor per board. Connect AVCC to VCC through a low-pass RC network (10 ohm + 100nF) when ADC accuracy matters, and tie AREF to GND through 100nF when using internal references. Do not route switching loads under the ADC port traces. Follow the Microchip AVR Hardware Design Considerations application note for TQFP decoupling patterns.
Estimated: at 5V and 8MHz, an ATmega-class core draws roughly 5-7mA active; at 3.3V this drops proportionally. Use the power-down sleep mode between events for battery designs, waking via pin-change or watchdog.brownout detection should be enabled via fuse settings appropriate to the rail (4.3V class for 5V, 2.7V class for 3.3V operation). Verify exact current figures against the ATMEGA165PV datasheet electrical characteristics table rather than relying on family estimates.
JTAG shares pins PF4-PF7 with ADC channels 4-7: if the JTAGEN fuse is left programmed, those four ADC inputs are unusable - disable JTAG in production firmware if you need all eight ADC channels. Also, PC7 doubles as a boot-related function depending on fuse configuration, and RESET must not be repurposed as GPIO unless external reset integrity is sacrificed. When migrating firmware to the ATMEGA165PA-AU, recompile rather than reusing binaries so the linker accounts for the newer device signature.
Thông tin tuân thủ
RoHS compliance and lead-free construction per distributor listings (green package). Formal REACH and conflict-minerals declarations should be obtained from Microchip's environmental compliance portal.