ATMEGA1608-AU - 8-bit AVR MCU 20MHz 16KB Flash TQFP-32 | Microchip
Référence : ATMEGA1608-AU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.35 | $1,35 |
| 10 | $1.21 | $12,10 |
| 100 | $1.05 | $105,00 |
| 500 | $0.94 | $470,00 |
| 1 000 | $0.86 | $860,00 |
ATMEGA1608-AU Présentation
A microcontroller (MCU) is a complete computing system integrated on a single chip, combining a processor core, program memory, data memory, and peripherals. The megaAVR 0-series sits in the mid-range of Microchip's 8-bit AVR hierarchy, above the tinyAVR line and below the 48 KB flagship ATmega4809, targeting general-purpose embedded control.
Key features include a 3-stage pipelined AVR core executing most instructions in a single cycle, an advanced Flexible Peripheral Multiplexer (PORTMUX) that routes peripherals to any compatible pin, and dual analog comparators. The device integrates USART, SPI, and TWI (I2C) serial interfaces, plus 10-bit ADC with up to 16 input channels and an 8-bit DAC for waveform generation.
Technical depth comes from the latest AVR core architecture: the hardware multiplier executes 8x8 multiply in one cycle, and the Event System allows peripherals to communicate without CPU intervention, reducing latency and power. Sleep modes down to sub-uA levels, a windowed watchdog timer, and a Programmable Custom Logic (PCL) block extend design flexibility. Functional Safety (FuSa) documentation support simplifies IEC 61508-oriented designs.
Typical applications include industrial automation nodes, home appliances, IoT sensor endpoints, and motor control interfaces where 5V noise immunity and low BOM cost matter.
For design, note the 1.8V to 5.5V supply range allows direct 5V or 3.3V operation, but maximum clock frequency scales with VDD; at 5V the full 20 MHz is available, while lower voltages require derating.
This page synthesizes distributor pricing, drop-in family alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet. Pricing shown is as of 2026-09-16.
Alternatives de remplacement direct pour ATMEGA1608-AU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA1608-AU (même facteur de forme et même empreinte) — différant par Core Processor, Series, Peripherals, Package, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA1608-AFR
✅ Remplacement direct✓ En stock
$0.81 / unité
Voir la fiche technique →ATMEGA3208-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.59 / unité
Voir la fiche technique →ATMEGA4808-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA808-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA1608-AN
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA1608-AU Valeurs maximales et caractéristiques électriques
| Core Processor | AVR (8-bit, hardware multiplier) |
| Core Size | 8-bit |
| Fréquence d'horloge maximale | 20 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Température de fonctionnement | -40C to +85C |
| Boîtier | 32-TQFP (7x7 mm) |
| Type de montage | Surface Mount |
| Peripherals | WDT, POR/BOD, Event System, Custom Logic, DAC |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| ADC Resolution | 10-bit |
| DAC Resolution | 8-bit |
| Series | megaAVR 0, Functional Safety (FuSa) |
| Product Status | Active |
| Packaging | Tray |
Configuration des broches de ATMEGA1608-AU
| Broche 1 | VDD — Power supply (1.8 V to 5.5 V) |
| Broche 2 | GND — Ground |
| Broche 3 | PA0 — GPIO / UPDI (also used for Unified Programming Debug Interface) |
| Broche 4 | PA1 — GPIO / analog input |
| Broche 5 | PA2 — GPIO / analog input |
| Broche 6 | PA3 — GPIO / analog input |
| Broche 7 | PA4 — GPIO / analog input |
| Broche 8 | PA5 — GPIO / analog input |
| Broche 9 | PA6 — GPIO / analog input |
| Broche 10 | PA7 — GPIO / analog input / RESET (configurable) |
| Broche 11 | PB0 — GPIO |
| Broche 12 | PB1 — GPIO |
| Broche 13 | PB2 — GPIO |
| Broche 14 | PB3 — GPIO |
| Broche 15 | PB4 — GPIO |
| Broche 16 | PB5 — GPIO |
| Broche 17 | PC0 — GPIO |
| Broche 18 | PC1 — GPIO |
| Broche 19 | PC2 — GPIO |
| Broche 20 | PC3 — GPIO |
| Broche 21 | PC4 — GPIO |
| Broche 22 | PC5 — GPIO |
| Broche 23 | PC6 — GPIO |
| Broche 24 | PD0 — GPIO |
| Broche 25 | PD1 — GPIO |
| Broche 26 | PD2 — GPIO |
| Broche 27 | PD3 — GPIO |
| Broche 28 | PD4 — GPIO |
| Broche 29 | PD5 — GPIO |
| Broche 30 | PD6 — GPIO |
| Broche 31 | PD7 — GPIO |
| Broche 32 | RESET — Reset input (dedicated pin) |
Applications typiques
ATMEGA1608-AU convient pour 6 applications: Industrial Automation Nodes, IoT Sensor Endpoints, Home Appliances, Motor Control Interfaces, Consumer Electronics Controllers, Test and Measurement Fixtures.
Industrial Automation Nodes
The ATMEGA1608-AU fits industrial control nodes because it combines a 20 MHz AVR core with 5.5V-tolerant, 1.8V to 5.5V operation and an industrial -40C to +85C temperature rating, providing noise immunity on 24V-backed 5V logic rails. Its Event System routes ADC results or comparator events to timers and communication peripherals without CPU cycles, so a node can service a sensor and maintain a Modbus-over-USRA link concurrently. The 16 KB Flash typically holds protocol stacks and calibration tables while 2 KB SRAM buffers data frames. The Functional Safety (FuSa) documentation support simplifies qualification in machinery adhering to functional-safety-oriented design processes.
Recommandé
IoT Sensor Endpoints
For battery-backed or line-powered IoT sensor endpoints, the ATMEGA1608-AU offers multiple sleep modes with low wake-up latency from the megaAVR 0-series core, letting a node sleep between sampling intervals and wake on a comparator, timer, or pin event. The 10-bit ADC with up to 16 input channels digitizes analog sensors directly, while the USART and SPI link to wireless modules such as BLE or LoRa radios. 16 KB Flash accommodates a lightweight firmware with sensor compensation algorithms, and the 256-byte EEPROM stores device calibration and network credentials across power cycles. At 5V operation, noise margins remain robust in electrically noisy environments.
Recommandé
Home Appliances
White goods and small appliances benefit from the ATMEGA1608-AU's combination of low cost, 5V noise immunity, and robust peripherals. The 10-bit ADC reads user controls and NTC temperature sensors, the 8-bit DAC can generate reference tones or bias levels, and Programmable Custom Logic implements simple state machines in hardware, offloading critical sequencing such as relay actuation from software. The windowed watchdog timer with early warning interrupts prevents lockups in devices that must never hang mid-cycle. The TQFP-32 7x7 mm footprint suits cost-optimized two-layer appliance PCBs, and the -40C to +85C rating covers kitchen and laundry environments.
Recommandé
Motor Control Interfaces
While the megaAVR 0-series targets small motor applications, the ATMEGA1608-AU manages brushed DC and stepper motor interfaces well: its hardware multiplier accelerates PID loop math at 20 MHz, and Event System routes PWM timer outputs through Custom Logic to build complementary drive signals with dead time. The 10-bit ADC monitors current sense shunts and back-EMF, and a USART links to a higher-level controller. Designers should pair the MCU with a gate driver or integrated bridge for the power stage. The 5V I/O directly drives many gate-driver inputs, reducing level-shifting components in 24V motor systems.
Recommandé
Consumer Electronics Controllers
The ATMEGA1608-AU serves as the main controller in low-cost consumer products such as small displays, chargers, and handheld devices. The Flexible Peripheral Multiplexer lets hardware designers place connectors without constraining firmware, since USART, SPI, TWI, and PWM functions route to alternate GPIO through register configuration. 16 KB Flash handles UI firmware including button debouncing, LED or LCD drive, and buzzer tone generation via the 8-bit DAC. Single-cycle I/O access makes bit-banged protocols responsive, and the hardware multiplier accelerates audio sample generation. Its tray packaging suits mid-volume consumer SMT assembly lines without reel constraints.
Recommandé
Test and Measurement Fixtures
Bench fixtures and production test jigs use the ATMEGA1608-AU as an inexpensive sequencing and measurement engine. The 20 MHz core with single-cycle execution reads DUT responses over SPI or TWI while the 10-bit ADC verifies analog thresholds; the Event System timestamps external triggers with hardware precision independent of software jitter. 2 KB SRAM buffers captured waveforms for pass/fail analysis, and 16 KB Flash holds multiple test scripts selected at runtime. USB-to-UART bridging through a companion chip exposes the fixture to PC control software. The TQFP-32's 0.8 mm pitch is compatible with standard assembly processes for custom test boards.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA1608-AU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA1608-AFR | ATMEGA3208-AU | ATMEGA4808-AU | ATMEGA808-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 32 KB | 48 KB | 8 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 6 KB | 1 KB |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Core | AVR 8-bit (megaAVR 0-series) | AVR 8-bit (megaAVR 0-series) | AVR 8-bit (megaAVR 0-series) | AVR 8-bit (megaAVR 0-series) | AVR 8-bit (megaAVR 0-series) |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Lifecycle Status | Active | Active | Active | Active | Active |
Principaux différenciateurs
- Cost-optimal 16 KB point of the 32-pin megaAVR 0-series (vs ATMEGA3208-AU)
- Upgrade headroom without PCB change (vs ATMEGA4808-AU)
- Extended-temperature variant available (vs ATMEGA1608-AFR)
Notes de conception
The ATMEGA1608-AU accepts 1.8V to 5.5V, but the maximum 20 MHz clock is only guaranteed at higher VDD; at lower supply voltages the internal frequency must be derated per the datasheet operating-frequency-vs-VDD curve. If you power the device at 3.3V, verify your intended clock speed against the derating table before locking the design. Add a 100 nF ceramic decoupling capacitor close to each VDD pin plus a bulk 4.7 uF capacitor, and enable the internal BOD (brown-out detector) at a threshold appropriate to your rail to prevent corrupted Flash writes during supply dips.
Route the UPDI programming pin (PA0) to a 3-pin or Tag-Connect footprint on every production PCB, since UPDI is the only programming/debug interface on megaAVR 0-series parts - unlike classic AVRs there is no ISP header option. Keep the RESET trace short and add an optional external pull-up; the dedicated RESET pin on the TQFP-32 can be avoided only if the datasheet's pin-configurable RESET option is used, which sacrifices a GPIO. The exposed-clock crystal circuit, if used, must sit within a few millimeters of the relevant pins with short ground returns.
Firmware written for classic ATmega328P-style parts will not compile unchanged: megaAVR 0-series uses a new register map, port naming (PORTA-PORTD with VPORT fast aliases), and a reworked ADC. Plan a migration budget if porting legacy AVR code. Also remember the Peripheral Multiplexer defaults - peripherals are not on fixed pins, so a forgotten PORTMUX register write leaves your UART on the wrong physical pin. MegaCoreX provides Arduino framework support for ATmega1608 if rapid prototyping is needed. Finally, EEPROM writes require the CPU clock to be above a minimum frequency per datasheet - check this in low-power clocked designs.
Informations de conformité
RoHS/lead-free status per Microchip standard green packaging for megaAVR 0-series; verify REACH and halogen-free certificates on Microchip's product page environmental documentation.