ATMEGA165-16AI - 8-bit AVR MCU 16KB Flash 16MHz 64-TQFP | Microchip
MPN: ATMEGA165-16AI ✓ Hoạt độngATMEGA165-16AI Tóm tắt
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle. Within the power management and embedded control hierarchy, the ATmega family sits in the general-purpose MCU class, bridging small 8-pin AVRs and larger 128KB devices. The ATmega165 is the non-LCD sibling of the ATmega169, sharing the same core, memory map and 64-pin TQFP footprint.
Key features include 130 powerful instructions with mostly single-cycle execution, eight general-purpose 8-bit working registers, fully static operation, and up to 16 MIPS throughput at 16MHz. The part provides in-system programmable FLASH with optional boot-code section for in-application programming, plus JTAG boundary-scan and on-chip debugging support typical of the ATmega165/169 device family.
Architecturally, the ATmega165 uses the AVR enhanced RISC pipeline with a single-level instruction fetch/decode stage, allowing one instruction per clock cycle for most opcodes. Program memory is organized as 8K x 16 bits, and the chip integrates SRAM, EEPROM, timers, USART serial port, SPI interface, an 8-channel 10-bit ADC, and multiple low-power sleep modes that make it well suited to battery-operated designs.
Typical applications include industrial control panels, sensor front ends and data loggers, HVAC and building automation nodes, and legacy embedded systems that require a proven 8-bit platform with ISP field upgrades. The 64-pin TQFP gives generous I/O count for keypads, displays and peripheral expansion.
When designing with the ATMEGA165-16AI, verify the supply voltage range against the specific datasheet table for this speed/temperature grade, decouple VCC and AVCC separately, and use the ISP interface (via the SPI pins) for production programming. Keep the JTAG pins in mind if boundary scan is required, as they double as general-purpose port pins after fuse programming.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing and stock references as of 2026-09-16.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA165-16AI — 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 ATMEGA165-16AI (cùng hình factor và footprint) — khác nhau ở Instruction Set, Package, EEPROM, Core Processor, Operating Temperature.
ATMEGA165-16AU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATMEGA165A-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA165PA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA165V-8AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA169-16AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA169-16AI
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA165-16AI Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR enhanced RISC, 8-bit |
| Flash Memory | 16 KB (8K x 16) In-System Programmable |
| Tần số xung maksimum | 16 MHz |
| Peak Throughput | 16 MIPS (at 16 MHz) |
| Instruction Set | 130 instructions, most single-cycle |
| Working Registers | 8 x general purpose 8-bit registers |
| Hộp | 64-TQFP (14 x 14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Debug/Scan | JTAG on-chip debug and boundary scan (per family datasheet) |
| Programming | In-System Programmable (ISP) via SPI |
Hướng dẫn cấu hình chân ATMEGA165-16AI 64-tqfp (14 x 14 mm)
Cấu hình chân cho ATMEGA165-16AI (64-tqfp (14 x 14 mm) gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho ATMEGA165-16AI.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
ATMEGA165-16AI phù hợp cho 6 Áp dụngs: Industrial Control Panels, Sensor Nodes and Data Loggers, HVAC and Building Automation, Legacy Embedded System Maintenance, Consumer Appliance Control, Test and Measurement Fixtures.
Industrial Control Panels
The ATMEGA165-16AI's -40C to +85C industrial temperature grade and deterministic AVR RISC core make it a strong fit for industrial control panels that sequence relays, read keypads and drive status indicators. The 64-pin TQFP exposes ample GPIO for front-panel I/O, while the 16KB ISP FLASH accommodates typical control firmware with headroom for field updates via a boot-loader. Its USART and SPI interfaces link to HMI expanders, EEPROM logging and RS-485 transceivers, and single-cycle instruction execution provides predictable scan timing for debounce loops and timing-critical interlocks without an RTOS.
Được đề xuất
Sensor Nodes and Data Loggers
For battery-backed sensor nodes, the ATmega165 family's fully static core and multiple sleep modes let the ATMEGA165-16AI idle between acquisition cycles, while the on-chip ADC digitizes analog sensors without an external converter. The 16MHz grade provides throughput headroom for filtering and scaling in firmware, and the SPI bus interfaces to SD-card or serial-FLASH logging media. The 64-TQFP footprint supports multi-channel analog front ends, and the picoPower ATMEGA165PA-AU drop-in offers a low-power redesign path without PCB changes when battery life becomes a constraint.
Được đề xuất
HVAC and Building Automation
Building automation controllers benefit from the ATMEGA165-16AI's combination of 16KB ISP FLASH for protocol stacks, USART for RS-485 MODBUS-style links, and generous port count for damper drives, valve outputs and sensor inputs on one 64-TQFP device. The industrial temperature rating covers rooftop and mechanical-room environments, and in-system programmability allows firmware updates of installed units through the boot-loader without removing controllers from the wall. Deterministic 16 MIPS execution supports fixed-time-step PID loops for temperature control with stable, jitter-free timing.
Được đề xuất
Legacy Embedded System Maintenance
Many installed AVR-based boards were designed around the original ATmega165 die; the ATMEGA165-16AI serves form-fit-function maintenance of those systems. Verified cross-references show ATMEGA169-16AU as a complete replacement with consistent terminals and package, and the ATMEGA165A/PA revisions as newer-silicon drop-ins, giving procurement several sourcing lanes when the original grade is constrained. Because the instruction set and pinout are unchanged, existing HEX images program identically via SPI ISP, minimizing requalification for repair-and-continue production of legacy equipment.
Được đề xuất
Consumer Appliance Control
Appliance control boards - coffee machines, washing-machine user interfaces, small heater controllers - historically used 64-pin ATmega devices for their keypad matrices, LED columns and triac-driving port count. The ATMEGA165-16AI supplies 16 MIPS for UI scanning, the ADC for NTC temperature sensing, and the USART for service-diagnostic links, all on one 64-TQFP (14x14 mm) footprint. Where mains zero-cross timing drives triacs, single-cycle instruction execution keeps interrupt latency low. The 16AU commercial-grade sibling can be chosen where the ambient profile permits, reducing cost in consumer housings.
Được đề xuất
Test and Measurement Fixtures
Bench fixtures and automated test equipment often pair an ATmega-class MCU with instrumentation interfaces. The ATMEGA165-16AI's JTAG boundary-scan capability supports board-level interconnect testing during fixture development, while the SPI and USART ports drive DACs, digitizers and PC links. The 16KB ISP FLASH holds fixture sequences that can be field-reprogrammed as products change, and the industrial temperature grade keeps fixtures stable in non-climate-controlled production areas. The shared 64-TQFP footprint with ATMEGA169 variants lets one fixture PCB serve multiple firmware builds.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA165-16AI — 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 | ATMEGA165-16AU | ATMEGA165A-AU | ATMEGA165PA-AU | ATMEGA165V-8AU | ATMEGA169-16AU |
|---|---|---|---|---|---|---|
| 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 (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 16 KB ISP FLASH | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 8 MHz | 16 MHz |
| LCD Controller | No | No | No | No | No | Yes (integrated LCD driver) |
| Power Technology | Standard AVR core | Standard AVR core | Standard AVR core (A revision) | picoPower (lower sleep current) | V-grade wide/lower voltage range | Standard AVR core |
| Drop-in Compatibility | Reference part | Yes - same die, temp grade differs | Yes - newer silicon revision | Yes - picoPower revision | Yes - 8MHz max, verify firmware | Yes - FindIC: complete replacement |
Bảo phân biệt quan trọng
- Industrial temperature grade without LCD overhead (vsATMEGA169-16AU)
- Full 16MHz throughput on original die (vsATMEGA165V-8AU)
- Newer-silicon sourcing flexibility (vsATMEGA165A-AU / ATMEGA165PA-AU)
Ghi chú thiết kế
Verify the supply voltage window for the -16AI speed/temperature grade directly in the ATmega165 datasheet tables before fixing the rail; AVR '16' grades and 'V' grades have different voltage ranges, and running a non-V grade below its specified minimum can cause unstable execution at 16MHz. Decouple VCC and AVCC independently with 100nF ceramics placed within 5mm of the pins, and connect AVCC to VCC through a low-pass LC filter when the ADC is active to protect the 10-bit converter from digital rail noise.
On the 64-TQFP (14x14 mm) land pattern, bring the ISP pins (MOSI, MISO, SCK, RESET, VCC, GND) to a tagged header or test pads, since all production programming and boot-loader recovery happens through SPI ISP. If JTAG boundary scan or on-chip debug is planned, route the four JTAG pins to a 2x5 header; otherwise they can be fuse-disabled and reused as port pins. Keep crystal traces for XTAL1/XTAL2 short (under 15mm) with guard ground for reliable 16MHz operation.
A frequent migration pitfall: the pin-compatible ATMEGA169-16AU adds an LCD controller whose pins overlap port pins on the ATmega165; firmware that drives those ports as general-purpose I/O will still work, but verify that no fuse defaults enable the LCD block after swap. Also confirm each candidate revision (A, PA) errata sheet before production - silicon revisions can change timer and USART edge behavior. Finally, reserve RESET as programming-only; disabling RESET for GPIO use complicates ISP recovery.
Thông tin tuân thủ
Compliance status not stated in the provided verified web data; confirm on the Microchip product compliance page before specification.