ATMEGA16-16AI - 8-bit AVR MCU 16KB Flash 16MHz TQFP-44 | Microchip
N.º da peça: ATMEGA16-16AI ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.86 | $5,86 |
| 10 | $5.28 | $52,80 |
| 100 | $4.62 | $462,00 |
| 500 | $4.18 | $2.090,00 |
| 1.000 | $3.82 | $3.820,00 |
ATMEGA16-16AI Visão geral
An 8-bit AVR microcontroller is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, UART, SPI, and ADC on one die. Within the semiconductor hierarchy it sits under microcontrollers -> embedded processors -> integrated circuits, and the AVR family is the direct ancestor of the ATmega line used across the embedded industry.
Key features of the ATMEGA16-16AI include the AVR enhanced RISC architecture executing 131 powerful instructions, most in a single clock cycle, with 32 general-purpose working registers. The self-programming Flash supports in-system programming via SPI, while the on-chip JTAG interface enables boundary-scan debugging and programming. The 8-channel 10-bit ADC with internal reference supports direct analog sensor interfacing, and four PWM channels serve motor and LED control.
Technically, the single-cycle execution model delivers approximately 1 MIPS per MHz, allowing designers to trade clock speed against power consumption. The 16 suffix denotes a maximum 16 MHz clock; the A suffix denotes the industrial temperature grade; the I suffix combined with the AU lead-free package code marks RoHS-relevant package variants of the ATmega16 core family.
Typical applications include industrial control panels, motor control and power inverter user interfaces, sensor nodes with analog inputs, and legacy embedded systems where the ATmega16 architecture, code base, and toolchain (AVR Studio, avr-gcc) are already qualified.
Design consideration: the ATMEGA16-16AI is a 5V device - level shifting is required to interface with 3.3V peripherals, and VCC/AVCC decoupling plus a clean AREF path are essential for ADC accuracy.
This page synthesizes verified distributor pricing, drop-in alternatives within the same TQFP-44 footprint, and practical design guidance not consolidated in the manufacturer datasheet.
Alternativas drop-in para ATMEGA16-16AI — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA16-16AI (mesmo formato e footprint) — diferindo em Maximum Clock Frequency, Operating Temperature, Mounting Type, Package, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA16-16AU
✓ Em estoque
$4.41 / unidade
Ver ficha técnica →ATMEGA16A-AU
✓ Em estoque
$2.05 / unidade
Ver ficha técnica →ATMEGA16U2-AU
✓ Em estoque
$1.86 / unidade
Ver ficha técnica →ATMEGA32-16AI
📋 Alternativa de referência (fora do catálogo)
ATMEGA16L-8AC
📋 Alternativa de referência (fora do catálogo)
ATMEGA16-16AI Classificações máximas e características elétricas
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 16 KB (8K x 16) In-System Programmable |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Frequência máxima de clock | 16 MHz |
| Throughput | Up to 16 MIPS at 16 MHz |
| Instruction Set | 131 instructions, most single-cycle |
| ADC | 8-channel, 10-bit |
| Debug Interface | JTAG (on-chip debug and boundary scan) |
| Tensão de alimentação | 5 V (VCC) |
| Temperatura de operação | -40C to +85C (industrial, I grade) |
| Encapsulamento | 44-TQFP (10 x 10 mm) |
| Tipo de montagem | Surface Mount (SMD/SMT) |
| Timers | Two 8-bit + one 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C-compatible) |
| In-System Programming | Yes, via SPI |
Guia de Configuração de Pinos do ATMEGA16-16AI 44-tqfp (10 x 10 mm)
Configuração de pinos para ATMEGA16-16AI (pacote 44-tqfp (10 x 10 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATMEGA16-16AI.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATMEGA16-16AI é adequado para 6 aplicaçãos: Industrial Control Panels, Analog Sensor Nodes, DC Motor and PWM Control, Legacy Embedded System Maintenance, Power Inverter User Interfaces, Education and Hobby Embedded Platforms.
Industrial Control Panels
The ATMEGA16-16AI fits industrial panel controllers because its 5V supply, -40C to +85C industrial temperature grade, and 44-TQFP footprint with 32 GPIO lines cover relay sequencing, button debouncing, and indicator driving in a single chip. The 16 MIPS throughput at 16 MHz is ample for scan-cycle state machines, while the 512 B EEPROM stores setpoints and counters that survive power loss. JTAG on-chip debugging shortens commissioning of panel logic, and in-system SPI programming allows firmware updates without desoldering. Use opto-isolated inputs on the ADC and keep VCC decoupled with 100 nF per supply pin for noise immunity in electrically harsh cabinets.
Recomendado
Analog Sensor Nodes
The integrated 8-channel 10-bit ADC makes the ATMEGA16-16AI a strong fit for multi-sensor acquisition nodes: temperature, pressure, and potentiometer inputs can be sampled directly without an external converter. AVCC must be kept clean (separate LC filter from VCC) and AREF decoupled to preserve effective ADC accuracy; with a stable reference the converter supports 10-bit resolution adequate for condition-monitoring thresholds. USART and TWI interfaces forward readings to gateways, and the 16 KB Flash retains calibration routines. Sleep modes reduce average current in battery-buffered installations, trading sample rate against power at roughly 1 MIPS per MHz efficiency.
Recomendado
DC Motor and PWM Control
With four PWM channels generated by two 8-bit timers and one 16-bit timer, the ATMEGA16-16AI drives DC motor speed control and simple multi-phase sequencing. The 16-bit timer's input capture measures tacho pulses for closed-loop speed regulation, while the 10-bit ADC reads current shunts for overload protection - all without external peripherals. Pairing the MCU with an IR2110-class gate driver bridges low-side/high-side MOSFET stages in half-bridge drives. Designers should set PWM frequency above the audible band where possible, ensure dead-time in software for H-bridge operation, and verify that 16 MIPS loop rate meets the control bandwidth target.
Recomendado
Legacy Embedded System Maintenance
A primary ongoing role of the ATMEGA16-16AI is sustaining fielded AVR-based equipment. Its exact instruction-set and peripheral compatibility with the original ATmega16 die means existing binaries and avr-gcc/AVR Studio projects port without requalification when sourced as replacement stock; the ATMEGA16A-AU refresh in the same TQFP-44 footprint is the strategic second source. JTAG boundary scan supports fixture-based production test of repaired boards, and the 16 MHz/5V rating matches the original power budget exactly. Procurement teams should buy buffer stock for end-of-service equipment because distributor stock of this legacy part is intermittent, as DigiKey's 0-unit listing shows.
Recomendado
Power Inverter User Interfaces
Power inverter and UPS front panels benefit from the ATMEGA16-16AI combination of TWI (I2C) for reading power-monitoring ICs, ADC channels for potentiometer-set points, and 16-bit timer PWM for buzzer and backlight control. The 5V logic directly drives 5V optocouplers that isolate the user interface from the high-voltage stage, a common architecture in 24V/48V industrial inverters. Industrial temperature rating keeps the interface alive in hot enclosures, and 1 KB SRAM accommodates menu structures and event logs in EEPROM. Keep the MCU ground on the isolated low-voltage side and route ADC traces away from switching nodes to protect measurement fidelity.
Recomendado
Education and Hobby Embedded Platforms
The ATmega16 family remains a staple in university embedded-systems laboratories and maker projects because JTAG debugging, in-system SPI programming, and free gcc toolchains make every peripheral (timers, UART, ADC, TWI, SPI) observable at register level. The 44-TQFP student-friendly footprint is hand-solderable with modest skill, and abundant textbook material targets the ATmega16 specifically. Note for newcomers: this part lacks seamless Arduino ecosystem support - community cores such as MightyCore fill the gap but require manual configuration, so plain AVR C toolchains are the smoother learning path. Its 5V operation also simplifies breadboard interfacing with classic 5V peripherals and displays.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA16-16AI — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA16-16AU | ATMEGA16A-AU | ATMEGA32-16AI | ATMEGA16L-8AC |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 8 MHz |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | Commercial grade |
Principais diferenciais
- Full 16 MHz speed grade at 5V (vs ATMEGA16L-8AC)
- Integrated 8-channel 10-bit ADC (vs ATMEGA16U2-AU)
- Cost-efficient entry point in the mega family (vs ATMEGA32-16AI)
Notas de projeto
The ATMEGA16-16AI is a 5V-only device at the 16 MHz speed grade. Place 100 nF ceramic decoupling capacitors directly at VCC and AVCC pins, plus a 10 uF bulk capacitor near the regulator output. AVCC must stay within +/-0.3V of VCC per the Atmel datasheet; if VCC is noisy, feed AVCC through an LC filter (ferrite bead plus 100 nF/10 uF) to protect ADC accuracy. For 3.3V systems, add bidirectional level shifters rather than derating VCC, which would violate the 16 MHz operating point.
Route the JTAG header (TCK, TMS, TDI, TDO on PC2-PC5) to a standard 2x5 header on production boards even if debugging is finished - it enables boundary-scan production test. Keep the AREF pin with its own dedicated 100 nF capacitor to ground; never connect AREF to VCC directly when using the internal reference. Crystals for XTAL1/XTAL2 should sit within 10 mm of the pins with appropriate load capacitors, and keep fast PD/PB signal traces away from the crystal net to avoid start-up jitter.
Three frequent mistakes with ATmega16 designs: (1) forgetting that JTAG is fuse-enabled by default, blocking PC2-PC7 general-purpose use - clear the JTAGEN fuse in final firmware if those I/O are needed; (2) assuming Arduino ecosystem compatibility - this part requires community cores (e.g., MightyCore) or plain avr-gcc, unlike ATmega328P; (3) ignoring supply-chain risk - DigiKey showed 0 stock for the AU variant as of 2026-09-16, so qualify ATMEGA16A-AU and hold safety stock for production programs.
Informações de conformidade
Compliance status not stated in retrieved web data; confirm RoHS/REACH status on the Microchip product page or certificate of conformance before specifying. One comparison source listed RoHS 'N' for a related variant - verify per exact ordering code.
