ATMEGA1608-MF - 8-Bit AVR MCU 20MHz 16KB Flash 32-VQFN | Microchip
MPN: ATMEGA1608-MF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.32 | $13.20 |
| 100 | $1.18 | $118.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.94 | $940.00 |
ATMEGA1608-MF Overview
An 8-bit microcontroller (MCU) integrates a processor core, memory, and peripherals on a single chip, positioned within the hierarchy of semiconductor devices as: ATmega1608 -> megaAVR 0-series -> 8-bit AVR MCU -> microcontroller -> embedded processor. The AVR architecture executes most instructions in a single clock cycle and includes a hardware multiplier, making it efficient for both control loops and light math-heavy tasks.
Key features include the AVR RISC core running up to 20 MHz, 16 KB (16K x 8) of self-programmable Flash, 2 KB SRAM, 256 bytes EEPROM, and a rich peripheral set typical of the megaAVR 0-series: multi-channel ADC, analog comparators, timers/counters, USARTs, SPI and I2C (TWI), plus Configurable Custom Logic (CCL) and Event System for peripheral interconnection without CPU intervention.
The megaAVR 0-series uses the latest AVR core with a two-stage pipeline, single-cycle I/O access, and a modern interrupt controller. The -MF suffix denotes the 32-VQFN (5x5) package at the industrial temperature range; the FuSa designation means the device is supported with functional-safety documentation, suitable for IEC 61508-oriented development. The device is programmed and debugged via the single-wire UPDI interface.
Typical applications include industrial control and automation nodes, motor control subsystems, functional-safety-oriented designs, sensor interfaces, and general embedded control in 28- and 32-pin cost-sensitive systems.
A key design consideration: the megaAVR 0-series programs via UPDI, not the older ISP used by classic ATmega328P-class parts, so tooling and bootloaders differ; UART-based bootloader support can ease migration. Verify supply voltage and clock configuration via fuse settings in Microchip MPLAB X with a PICkit 4 or SNAP programmer.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA1608-MF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA1608-MF (same form factor and footprint) β differing in Core Processor, Functional Safety Support, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA1608-AFR
β Drop-Inβ In Stock
$0.81 / Unit
View Datasheet βATMEGA1608-MFR
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA3208-MF
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.98 / Unit
View Datasheet βATMEGA808-MF
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA1609-MF
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA1608-MF Maximum Ratings & Electrical Characteristics
| Core Processor | AVR (megaAVR 0-series) |
| Core Size | 8-Bit |
| Maximum Clock Frequency | 20 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Hardware Multiplier | Yes |
| Package | 32-VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Product Series | megaAVR 0 (ATmega1608) |
| Functional Safety Support | FuSa (documentation available) |
| Debug/Programming Interface | UPDI (single-wire) |
| Peripherals | ADC, comparators, timers, USART, SPI, TWI (I2C), CCL, Event System |
ATMEGA1608-MF 32-vqfn (5x5 mm) Pin Configuration Guide
Pin configuration for ATMEGA1608-MF (32-vqfn (5x5 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA1608-MF.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA1608-MF is suitable for 6 applications: Industrial Control and Automation, Functional Safety Oriented Systems, Sensor Interface Nodes, Motor Control Subsystems, Embedded Consumer and IoT Devices, Test and Measurement Accessories.
Industrial Control and Automation
The ATMEGA1608-MF fits industrial control nodes where a 20 MHz 8-bit AVR core, 16 KB Flash and 2 KB SRAM are sufficient for PLC-style I/O scanning, relay sequencing and Modbus-over-UART communication. The megaAVR 0-series peripheral set - multiple USARTs, SPI, TWI and the Configurable Custom Logic (CCL) blocks - lets designers offload simple combinatorial logic from software, improving determinism. Its FuSa documentation support is valuable in machinery safety contexts requiring IEC 61508-oriented evidence. Mounted on a 32-VQFN 5x5 mm footprint, it conserves PCB area in compact DIN-rail modules, and the Event System routes peripheral signals without CPU intervention, reducing interrupt latency.
Recommended
Functional Safety Oriented Systems
The ATMEGA1608-MF is explicitly positioned by DigiKey as a megaAVR 0 Functional Safety (FuSa) MCU, meaning Microchip supplies safety documentation - safety manual and FMEDA - that accelerates IEC 61508-oriented system certification. Hardware building blocks include a windowed watchdog, brown-out detection, and Flash CRC capabilities that safety architectures use for fault detection. Designers typically implement dual-channel or diverse redundancy with a companion MCU, using the Event System and CCL for hardware-based plausibility checks. The 20 MHz AVR core with hardware multiplier provides the computational headroom for diagnostic routines while retaining single-cycle deterministic execution for safety functions.
Recommended
Sensor Interface Nodes
The ATMEGA1608-MF serves as a compact sensor hub: its multi-channel ADC digitizes analog sensor outputs, while SPI and TWI (I2C) interfaces connect digital sensors. The 2 KB SRAM accommodates averaging filters and calibration buffers, and the 20 MHz hardware-multiplier core executes fixed-point compensation math efficiently. The Event System can trigger ADC conversions from timer overflows without CPU wake-up, dramatically cutting power in duty-cycled battery nodes. In the 32-VQFN 5x5 mm package the MCU occupies minimal board area next to the sensor front end, and 256 bytes of EEPROM store per-unit calibration constants across power cycles.
Recommended
Motor Control Subsystems
The ATMEGA1608-MF handles small BLDC and brushed DC motor control: hardware timers generate PWM at up to 20 MHz clock resolution, the ADC samples back-EMF and current shunts, and CCL gates can implement hardware shutdown on fault conditions. The 16 KB Flash holds commutation tables and PI control loops with room for a UART bootloader. The hardware multiplier accelerates control-loop arithmetic that would otherwise dominate an 8-bit core. Designers pair it with gate drivers rather than integrated motor drivers when flexibility is needed, and the 32-VQFN footprint integrates neatly beside the power stage on the same PCB.
Recommended
Embedded Consumer and IoT Devices
For cost-sensitive consumer electronics and IoT endpoints, the ATMEGA1608-MF offers a well-supported, low-risk choice: the megaAVR 0-series is supported by MPLAB X, Microchip Studio, and the community MegaCoreX Arduino package covering ATmega1608 and siblings. The 20 MHz core with hardware multiplier covers UI scanning, protocol handling, and light cryptography helpers, while USART/SPI/TWI link to wireless modules. The 16 KB Flash suits applications with modest code footprints; when OTA features grow, the pin-compatible ATMEGA3208 doubles memory without a PCB respin. Its FuSa pedigree also adds credibility for safety-adjacent consumer appliances.
Recommended
Test and Measurement Accessories
The ATMEGA1608-MF is a natural fit for handheld meters, dongles and bench accessories: deterministic single-cycle I/O enables precise bit-banged protocols, while the ADC and analog comparators support range checks and threshold alarms in hardware. The Event System ties timer capture to comparator events with sub-microsecond latency - useful for frequency counting and pulse-width measurement. Firmware fits comfortably in 16 KB Flash including a USB-UART or UART command interface. Community support via MegaCoreX Arduino tooling shortens prototyping, and the compact 32-VQFN 5x5 mm package suits handheld enclosures where every square millimeter of PCB counts.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA1608-MF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA1608-AFR | ATMEGA3208-MF | ATMEGA808-MF | ATMEGA1609-MF |
|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 32 KB | 8 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 1 KB | 2 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 128 bytes | 256 bytes |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| FuSa Documentation Support | Yes | Yes | Yes | Yes | Yes |
| Programming Interface | UPDI | UPDI | UPDI | UPDI | UPDI |
Key Differentiators
- Functional Safety (FuSa) documentation support (vs ATMEGA3208-MF)
- Pin-compatible memory scaling within 32-VQFN footprint (vs ATMEGA808-MF)
- Hardware multiplier on 8-bit AVR core (vs ATMEGA808-MF)
- Same-die drop-in options across ordering codes (vs ATMEGA1608-AFR)
Design Notes
The megaAVR 0-series programs via UPDI, not the classic SPI ISP interface used by ATmega328P-era parts. Legacy ISP programmers and Arduino-as-ISP flows will not work. Use a PICkit 4, MPLAB SNAP, or a UPDI-capable tool with MPLAB X, or adopt a UART bootloader for field updates. Engineers migrating from classic AVRs (per community discussions on ATMEGA1608 vs ATTINY416) should budget time for the UPDI toolchain change even though the C code ports easily.
The 32-VQFN (5x5 mm) package has a thermal pad/pin structure requiring a well-defined land pattern per the Microchip datasheet footprint. Place 100 nF decoupling capacitors at each VDD pin within 2 mm, and one bulk 4.7-10 uF capacitor near the supply entry. VQFN packages are sensitive to moisture - respect the MSL floor-life and bake per JEDEC guidance before reflow if the reel has been opened. Keep the UPDI pin trace short and test-point accessible for programming fixtures.
Estimated: megaAVR 0-series active current at 20 MHz/3.3 V is on the order of 5-6 mA (verify exact figure in the datasheet electrical characteristics). For battery designs, use the sleep modes with the Event System running peripheral-only tasks, and disable digital input buffers on unused analog pins to cut leakage. Confirm the brown-out detector setting matches your supply tolerance at low battery voltage to avoid corrupted EEPROM writes.
Compliance Information
Compliance details not present in the provided verified web data; consult Microchip's official product page environmental documentation.
