ATMEGA329-16AI - 8-bit AVR MCU 32KB Flash 16MHz LCD | Microchip
부품 번호: ATMEGA329-16AI ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA329-16AI 개요
An 8-bit AVR microcontroller is a member of the broader microcontroller (MCU) family of integrated circuits that combine a processor core, program memory, data memory, and peripherals on a single chip. Within the power-management-free general-purpose MCU hierarchy, AVR devices sit alongside PIC and ARM Cortex-M MCUs, executing most of their 130 powerful instructions in a single clock cycle to deliver throughput approaching 1 MIPS per MHz.
Key features of the ATMEGA329-16AI include 54 general-purpose I/O lines, 32 general-purpose working registers, a JTAG interface for on-chip debugging and boundary scan, and self-programming Flash with read-while-write capability. Peripherals include an 8-channel 10-bit ADC, SPI, UART/USART, and USI serial interfaces, plus Brown-out Detect/Reset, Power-on Reset, PWM outputs, a Watchdog Timer, and the segment LCD driver that distinguishes this device from the LCD-less ATmega328 family.
Architecturally, the AVR uses a Harvard structure with separate program and data buses, enabling single-cycle instruction fetch and execution. The -16AI ordering code specifies 16MHz speed grade, industrial temperature range of -40C to +85C, and TQFP packaging. Operating supply spans 2.7V to 5.5V, with the full 16MHz operation targeted at the 4.5V to 5.5V range.
Typical applications include industrial control panels driving segment LCDs, utility metering and instrumentation where the integrated LCD controller reduces external component count, and consumer electronics requiring robust 5V operation with in-system programmable firmware updates.
Design consideration: validate that the crystal frequency and supply voltage pair keeps the device within its safe operating envelope - at 5V the 16MHz grade is comfortable, but at 2.7V the maximum safe clock frequency drops substantially.
This page synthesizes distributor availability data, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
드롭인 대체품: ATMEGA329-16AI — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ATMEGA329-16AI (동일 폼 팩터 및 풋프린트) — 차이점: Package, LCD Controller, RoHS Status, ADC, Operating Temperature.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ATMEGA329P-16AU
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
ATMEGA325PA-AUR
✅ 드롭인✓ 재고 있음
$3.9 / 개
데이터시트 보기 →ATMEGA649-16AU
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$6.27 / 개
데이터시트 보기 →ATMEGA329V-8AU
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
ATMEGA329-16AI 최대 정격 & 전기적 특성
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 32 KB (16K x 16), ISP with read-while-write |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| 최대 클록 주파수 | 16 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| General Purpose I/O | 54 lines |
| Working Registers | 32 |
| ADC | 8-channel, 10-bit |
| Serial Interfaces | SPI, UART/USART, USI |
| LCD Controller | Integrated segment LCD driver |
| Debug Interface | JTAG (on-chip debug and boundary scan) |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| 패키지 | 64-TQFP (14x14 mm) |
| 동작 온도 | -40C to +85C (industrial) |
| 실장 유형 | Surface Mount |
| Programming | In-System Programmable (ICSP via MPLAB SNAP) |
ATMEGA329-16AI 64-tqfp (14x14 mm) 핀 구성 가이드
ATMEGA329-16AI(64-tqfp (14x14 mm) 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: ATMEGA329-16AI.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
ATMEGA329-16AI 적합 용도: 6 애플리케이션s: Industrial Control Panels with Segment LCD, Utility Metering and Instrumentation, Handheld Consumer Electronics, Building Automation Nodes, Automotive Body Subsystems (Non-Safety), Development and ICSP Prototyping.
Industrial Control Panels with Segment LCD
The ATMEGA329-16AI fits industrial control panels because its integrated segment LCD controller drives status and process displays directly, while 32KB Flash and 54 GPIO lines handle button scanning, relay control, and serial links to PLCs. Running at 16MHz in the 4.5V to 5.5V industrial supply range delivers roughly 16 MIPS for deterministic control loops, and the industrial -40C to +85C rating covers unconditioned factory-floor environments. The JTAG interface enables in-circuit debugging and boundary-scan test of the assembled panel, and brown-out reset plus watchdog timer protect against supply disturbances typical of industrial power buses.
추천
Utility Metering and Instrumentation
Electricity, water, and heat meters benefit from the ATMEGA329-16AI's combination of an on-chip LCD driver and an 8-channel 10-bit ADC, which digitize sensor inputs and drive the display from a single 64-TQFP chip, cutting BOM count versus discrete LCD-driver designs. The 1KB EEPROM stores calibration constants and billing data through power cycles, and self-programming Flash with read-while-write allows field firmware updates over the UART without halting acquisition. At 5V the 16MHz core executes tariff calculations quickly, while sleep modes with watchdog timing support battery- or capacitor-backed meter installations that must survive brief outages.
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Handheld Consumer Electronics
Handheld devices such as remote controls, thermostats, and portable testers use the ATMEGA329-16AI's 64-pin TQFP to integrate LCD driving, key scanning, and USART/USI communication in one package, reducing board area for compact enclosures. The 2.7V to 5.5V supply range tolerates two- or three-cell battery configurations as the pack discharges, and brown-out reset prevents corrupt EEPROM writes at end-of-discharge. Single-cycle AVR execution at up to 16MHz keeps UI response snappy, while in-system programmable Flash lets manufacturers update firmware at final assembly or in the field through the two-wire ICSP pins, protecting software investment across product revisions.
추천
Building Automation Nodes
In building automation, the ATMEGA329-16AI serves as a wall-unit or zone controller: the segment LCD shows setpoints and status, the 10-bit ADC reads temperature and humidity sensor channels, and the SPI/USART interfaces link to RS-485 transceivers for networked communication. Its industrial temperature rating and 5V noise immunity suit electrically noisy HVAC environments better than 3.3V-only MCUs. PWM outputs directly drive damper actuators or fan speed stages. Because the LCD and ADC are on-chip, a complete zone controller fits on a small two-layer PCB, and JTAG-based debugging accelerates commissioning of custom firmware for each building site.
추천
Automotive Body Subsystems (Non-Safety)
Microchip product documentation lists automotive systems among target markets for the ATmega329. In non-safety body electronics such as climate-control head units, the LCD controller drives temperature and fan displays, the ADC reads potentiometer and NTC inputs, and the watchdog plus brown-out reset handle the cranking-voltage transients common on 12V rails via a local 5V regulator. The -40C to +85C industrial grade covers most passenger-compartment locations. Designers should verify AEC-Q100 qualification requirements for their platform; where full automotive qualification is mandatory, a Q-graded device should be selected instead of the standard ATMEGA329-16AI.
추천
Development and ICSP Prototyping
The ATMEGA329-16AI supports in-circuit serial programming and JTAG on-chip debugging, making it a practical target for education and prototyping boards. According to Microchip, the MPLAB SNAP programmer connects over High-Speed USB 2.0 through an 8-pin SIL connector using two device I/O pins and the reset line for both debugging and ICSP. The 32KB self-programming Flash accommodates bootloaders that reflash application code over UART, so a single production board doubles as a development kit. Generous 54-I/O breakout on a 64-TQFP footprint makes the device popular on through-hole-adapter prototyping hardware for AVR coursework.
추천
추천 제품 요약
엔지니어링 참조 데이터: ATMEGA329-16AI — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ATMEGA329P-16AU | ATMEGA325PA-AUR | ATMEGA649-16AU | ATMEGA329V-8AU |
|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 20 MHz | 16 MHz | 8 MHz |
| SRAM | 2 KB | 2 KB | 2 KB | 4 KB | 2 KB |
| LCD Controller | Yes (segment LCD) | Yes (segment LCD) | Yes (segment LCD) | Yes (segment LCD) | Yes (segment LCD) |
| Low-Power Technology | Standard AVR | picoPower | picoPower | Standard AVR | Wide-V (1.8V) low-voltage |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
주요 차별점
- Integrated segment LCD controller (vs ATMEGA328PB-AU)
- Lower sleep power available without redesign (vs ATMEGA329P-16AU)
- Memory headroom on the same footprint (vs ATMEGA649-16AU)
설계 노트
The ATMEGA329-16AI runs 2.7V to 5.5V, but the 16MHz speed grade assumes the upper voltage band. At 5V, 16MHz operation is safe; near 2.7V the maximum clock is substantially derated, so a design using a discharging battery and a crystal must either reduce frequency as voltage falls or select the wide-V ATMEGA329V-8AU instead. Enable brown-out detection and verify AVCC is tied to a clean analog supply with its own decoupling for accurate 10-bit ADC results.
On the 64-TQFP (14x14 mm) footprint, place 100nF ceramic decoupling capacitors within 2-3 mm of each VCC/AVCC pin pair and add bulk 10uF near the regulator. The LCD driver pins carry small AC drive signals - route them as a tidy bus away from the crystal and high-current switching traces to avoid ghost segments. Provide an unbroken ground plane under the ADC input region; 10-bit accuracy degrades quickly with noisy returns.
Do not confuse the ATmega329 (64-pin TQFP) with the ATmega3290 (100-pin TQFP): they share a datasheet but have different footprints and are not interchangeable. JTAG pins on the 64-pin device double as port I/O - if JTAG is enabled at reset, those four pins cannot be used as GPIO until the JTAGEN fuse is cleared. When migrating firmware to the picoPower ATMEGA329P-16AU, revisit sleep-mode register settings, as the picoPower implementation differs slightly.
규정 준수 정보
RoHS/lead-free indicated by the standard commercial ordering code and Microchip product data; REACH, halogen-free, and conflict-minerals status were not stated in reviewed sources and must be confirmed via Microchip's official product compliance documentation.