ATMEGA3290PA-AUR - 8-Bit AVR MCU 32KB 20MHz TQFP-100 | Microchip
부품 번호: ATMEGA3290PA-AUR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.16 | $41.60 |
| 100 | $3.68 | $368.00 |
| 500 | $3.31 | $1,655.00 |
| 1,000 | $2.95 | $2,950.00 |
ATMEGA3290PA-AUR 개요
An 8-bit microcontroller is a single-chip processor whose data bus is eight bits wide, executing one byte per instruction cycle. Within the power-management hierarchy, it integrates CPU, memory, timers, communication peripherals, and an LCD controller on one die, replacing multi-chip solutions and reducing board area, BOM cost, and system power. The AVR family is a Harvard-architecture RISC line originally developed by Atmel, now part of Microchip Technology.
Key features include 131 powerful instructions with mostly single-clock-cycle execution, high throughput of up to 20 MIPS at 20MHz, and advanced power-management modes including idle, power-save, power-down, standby, and extended standby that exploit the picoPower technology of the PA suffix for ultra-low sleep currents. The embedded 4x40 segment LCD driver directly drives glass displays without external driver ICs, a differentiator that defines this device family.
Architecturally, the device uses a Harvard design with separate program and data buses, self-programmable Flash for boot-loader firmware updates, and on-chip debug via debugWIRE. Peripherals include two 8-bit timer/counters with separate prescaler and compare mode, one 16-bit timer/counter, USART, SPI, and analog comparators typical of the ATmega LCD family.
Typical applications include utility metering (electricity, water, gas meters with LCD glass), industrial control panels with segmented displays, and portable instruments where the picoPower sleep modes extend battery life for years.
Design consideration: full 20MHz operation requires a supply of 4.5V to 5.5V; derate clock speed for lower supply voltages per the Speed/Grade versus Voltage curve in the manufacturer datasheet.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: ATMEGA3290PA-AUR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ATMEGA3290PA-AUR (동일 폼 팩터 및 풋프린트) — 차이점: Package, Instructions, LCD Controller, RoHS Status, Operating Temperature.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ATMEGA3290PA-AU
✅ 드롭인✓ 재고 있음
$4.48 / 개
데이터시트 보기 →ATMEGA3250PA-AUR
✅ 드롭인✓ 재고 있음
$2.98 / 개
데이터시트 보기 →ATMEGA3250A-AUR
✅ 드롭인✓ 재고 있음
$3.55 / 개
데이터시트 보기 →ATMEGA6490A-AUR
✅ 드롭인✓ 재고 있음
$6.55 / 개
데이터시트 보기 →ATMEGA3250V-8AUR
✅ 드롭인✓ 재고 있음
$3.38 / 개
데이터시트 보기 →ATMEGA3290PA-AUR 최대 정격 & 전기적 특성
| Core Processor | AVR |
| Core Size | 8-Bit |
| Program Memory Type | FLASH |
| Program Memory Size | 32KB (16K x 16) |
| RAM Size | 2KB |
| EEPROM Size | 1KB |
| 최대 클록 주파수 | 20 MHz |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Instruction Set | 131 powerful instructions, most single-clock cycle |
| LCD Driver | 4 x 40 Segment LCD Driver |
| Timers | Two 8-bit timer/counters with separate prescaler and compare mode; one 16-bit timer/counter |
| 패키지 | TQFP-100 (14x14 mm), 0.8 mm pitch |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40C to +85C (Industrial) |
| Programming Method | In-System Programmable (ISP), self-programming Flash |
| Power Modes | Idle, Power-save, Power-down, Standby, Extended Standby (picoPower) |
| RoHS 상태 | Green / Compliant (per FindIC listing) |
ATMEGA3290PA-AUR tqfp-100 (14x14 mm), 0.8 mm pitch 핀 구성 가이드
ATMEGA3290PA-AUR(tqfp-100 (14x14 mm), 0.8 mm pitch 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: ATMEGA3290PA-AUR.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
ATMEGA3290PA-AUR 적합 용도: 6 애플리케이션s: Utility Metering (Electricity / Water / Gas), Industrial Control Panels with LCD, Battery-Powered Portable Instruments, Building Automation and HVAC Controllers, Consumer Appliance Display Boards, POS Terminals and Payment Accessories.
Utility Metering (Electricity / Water / Gas)
The ATMEGA3290PA-AUR fits utility metering because its integrated 4x40 segment LCD driver directly drives the meter glass display without an external LCD controller, and its picoPower sleep modes cut average current to microamp levels between measurement cycles. The 32KB self-programmable Flash stores metering firmware and tariff tables, while 1KB EEPROM holds calibration and consumption data that must survive power loss. The 20MHz core at 4.5V-5.5V supplies enough headroom for pulse-counting and communication tasks. Designers typically run the device in power-save mode with an asynchronous timer wake-up for periodic accumulation, achieving years of battery-backed operation in water and gas meters.
추천
Industrial Control Panels with LCD
Industrial operator panels need a processor that shows status on a segmented LCD while scanning buttons and driving outputs - exactly the combination the ATMEGA3290PA-AUR provides with its on-chip 4x40 segment LCD driver, two 8-bit timers and one 16-bit timer, and 82 configurable I/O lines. The -40C to +85C industrial temperature grade and 4.5V-5.5V operation suit factory environments with noisy 5V rails. The 100-pin TQFP (14x14 mm, 0.8 mm pitch) footprint routes the large pin count on two-layer boards, keeping panel-controller BOM cost low. In-System Programming allows field firmware updates through a boot loader without desoldering the MCU, simplifying maintenance of deployed panel fleets.
추천
Battery-Powered Portable Instruments
Portable instruments benefit from the picoPower (PA) generation of this device: idle, power-save, power-down, standby, and extended standby modes reduce sleep current dramatically compared with the non-PA A-generation parts, directly extending battery life. The 4x40 segment LCD draws negligible power relative to dot-matrix alternatives, and the 16-bit timer supports precise measurement intervals from a watch-crystal in power-save mode. Although full 20MHz needs 4.5V-5.5V, designs typically clock slower at lower duty cycles. The 100-TQFP package is hand-assemblable for prototype builds, and 32KB Flash plus 2KB RAM accommodates protocol stacks and display menus typical of handheld instrumentation.
추천
Building Automation and HVAC Controllers
Thermostats and zone controllers require a readable display, EEPROM-writable setpoints, and reliable timer functions - all native to the ATMEGA3290PA-AUR. The on-chip LCD driver renders temperature and mode on standard segmented glass, 1KB EEPROM stores user setpoints through power cycles, and the USART/SPI peripherals link to RS-485 transceivers for networked HVAC buses. The industrial -40C to +85C rating covers unconditioned mechanical rooms. At 20MHz with single-cycle execution, PID loops for damper and valve control execute comfortably within scan cycles. Family pin compatibility (3250/3290/6490 in 100-TQFP) lets one PCB serve multiple controller SKUs by swapping MCU variants and firmware.
추천
Consumer Appliance Display Boards
White-goods and appliance control boards traditionally pair an 8-bit MCU with an LCD glass; the ATMEGA3290PA-AUR consolidates both into one 100-TQFP device, cutting component count and assembly cost. The green/RoHS-compliant package supports consumer environmental requirements, and the 5V, 20MHz operation aligns with appliance mains-derived supplies. Self-programmable Flash enables manufacturing-line firmware loading and post-sale feature updates. The large pin count provides the dozens of I/O lines appliance boards need for relays, buttons, and encoders while the LCD driver handles the 4x40 segment display. PicoPower standby modes support low-wattage off-mode energy regulations now common in household appliance standards.
추천
POS Terminals and Payment Accessories
Low-cost point-of-sale peripherals - customer displays, keypads, and receipt accessories - use the ATMEGA3290PA-AUR for its segmented LCD output, ample I/O, and EEPROM storage of serial numbers and configuration. The 100-pin TQFP supplies enough pins for matrix keypad scanning and display drive from a single chip, and the AVR toolchain (AVR GCC, MPLAB-compatible ecosystem) keeps software costs near zero. Tape-and-reel -AUR packaging feeds pick-and-place lines in volume assembly, while the industrial temperature grade tolerates outdoor kiosk enclosures. Field firmware updates via self-programming Flash allow payment-accessory vendors to patch protocol firmware across installed bases without hardware recall.
추천
추천 제품 요약
엔지니어링 참조 데이터: ATMEGA3290PA-AUR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ATMEGA3290PA-AU | ATMEGA3250PA-AUR | ATMEGA3250A-AUR | ATMEGA6490A-AUR | ATMEGA3250V-8AUR |
|---|---|---|---|---|---|---|
| Package | TQFP-100 (14x14 mm, 0.8 mm pitch) | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock | 20 MHz | 20 MHz | 20 MHz | 16 MHz | 16 MHz | 8 MHz |
| SRAM | 2KB | 2KB | 2KB | 2KB | 4KB | 2KB |
| LCD Driver | 4 x 40 segments | 4 x 40 segments | 4 x 40 segments | 4 x 40 segments | 4 x 40 segments | 4 x 40 segments |
| Power Technology | picoPower (PA) | picoPower (PA) | picoPower (PA) | standard (A) | standard (A) | low-voltage (V) |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
주요 차별점
- picoPower generation sleep current (vs ATMEGA3250A-AUR)
- Cost-effective 32KB tier (vs ATMEGA6490A-AUR)
- Full-speed 5V operation (vs ATMEGA3250V-8AUR)
- Tape-and-reel production packaging (vs ATMEGA3290PA-AU)
설계 노트
The ATMEGA3290PA-AUR requires 4.5V-5.5V for full 20MHz operation per the manufacturer datasheet. Never clock this device beyond the Speed versus Voltage curve - running 20MHz at 4.0V causes marginal instruction execution and intermittent failures that are hard to diagnose. If your board is 3.3V, do not use this AUR part; select a V-grade family member such as ATMEGA3250V-8AUR (2.7V-5.5V, 8MHz max) which shares the same 100-TQFP footprint. Add 100nF decoupling on each VCC/AVCC pair plus bulk 10uF near the regulator.
The 100-pin TQFP has 0.8 mm pitch - specify 0.5 mm-pitch-capable solder paste and inspect with AOI, since bridging between LCD-drive pins is the most common assembly defect on this family. Place the 32.768kHz watch crystal for the asynchronous timer (used in power-save mode) close to the device with short guard traces and a ground ring to preserve picoPower sleep current performance. Keep the ISP (SPI) header routed to pins dedicated to programming so field firmware updates remain possible after LCD routing consumes surrounding area.
Do not mix up PA and non-PA power expectations: the ATMEGA3250A/6490A A-generation parts have higher sleep current than this PA part, so a PCB designed around picoPower standby budgets will fail battery-life targets if a sourcing substitution to an A-grade part occurs silently. Also verify firmware register compatibility when substituting 3250/3290/6490 variants - LCD segment mapping and peripheral register layouts differ within the family even though the footprint is identical. Re-compile and bench-test LCD drive with the actual glass before approving any alternate MPN.
규정 준수 정보
FindIC and DigiKey listings describe the ATMEGA3290PA-AUR as GREEN T&R (halogen-free/lead-free packaging). Full REACH and conflict-minerals declarations should be confirmed on the Microchip product page.
