ATMEGA1608-XUR - 8-bit AVR MCU, 16KB Flash, 20MHz | Microchip
MPN: ATMEGA1608-XUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.32 | $1.32 |
| 10 | $1.18 | $11.80 |
| 100 | $1.04 | $104.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.86 | $860.00 |
ATMEGA1608-XUR Overview
An 8-bit AVR microcontroller is a single-chip computer that integrates a RISC processor core, program Flash, data SRAM, EEPROM, and peripherals such as timers, USARTs, and ADCs on one die. Within the power-management and embedded-control hierarchy, MCUs like the ATMEGA1608 sit at the system level, replacing discrete logic and analog control circuits while executing user firmware for sensing, sequencing, and communication tasks.
Key features of the ATMEGA1608 include the Core Independent Peripherals (CIPs) of the megaAVR 0-series, including the Configurable Custom Logic (CCL) blocks, the Event System that routes peripheral signals without CPU intervention, and intelligent analog such as a 10-bit ADC and analog comparators. The 16 KB Flash supports self-programming, while 256 bytes of EEPROM retain calibration data through power cycles. Hardware multiplication accelerates math-heavy firmware at the 20 MHz maximum clock.
Technically, the megaAVR 0-series uses the latest AVR core with a two-stage pipeline and single-cycle I/O access. Flexible low-power features include sleep modes, a peripherally-clocked Event System, and configurable wake-up sources, allowing battery- and mains-powered designs to minimize average current. The unified DataSheet DS40002172C covers the ATmega808/809/1608/1609 family, simplifying firmware reuse across Flash sizes.
Typical applications include industrial automation nodes, home-appliance and consumer control boards, and general-purpose embedded systems requiring 8-bit economics with modern peripherals. The 28-pin SSOP footprint suits compact, cost-sensitive two-layer PCBs.
A key design consideration is that the -XUR ordering code denotes tape-and-reel packaging of the industrial-grade 28-SSOP part; verify reel quantity and UPDI programming access in your production flow before committing the layout.
This page synthesizes distributor availability data, same-family drop-in migration paths, and practical design guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATMEGA1608-XUR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA3208-XU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA808-XU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA4808-XU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA1608-XUR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR (8-bit) |
| Core Size | 8-bit |
| Speed | 20 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Series | megaAVR 0-series (ATmega808/809/1608/1609) |
| Connectivity | UART/USART, SPI, I2C (TWI) |
| Peripherals | Core Independent Peripherals, Event System, Configurable Custom Logic, PWM, WDT, Brown-out Detect/Reset, POR |
| Operating Temperature | -40C to +85C (industrial, per -U grade) |
| Package | 28-SSOP |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (XUR suffix) |
| Functional Safety | FuSa (Functional Safety) supported family |
| RoHS Status | Compliant (per DigiKey listing) |
ATMEGA1608-XUR 28-ssop Pin Configuration Guide
Pin configuration for ATMEGA1608-XUR (28-ssop 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-XUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA1608-XUR is suitable for 6 applications: Industrial Automation Nodes, Home Appliance Control, Sensor and IoT End Nodes, Motor Control and Fan Drivers, Lighting and LED Fixtures, Educational and Prototyping Platforms.
Industrial Automation Nodes
The ATMEGA1608-XUR fits industrial automation nodes where reliable -40C to +85C operation and deterministic peripheral behavior are required. Its Core Independent Peripherals, including Configurable Custom Logic and the Event System, let sensor thresholding and simple control loops run without CPU intervention, reducing latency and firmware complexity. The 16 KB Flash accommodates communication stacks over USART, SPI, or I2C for field-bus gateways, while 256 bytes of EEPROM persist calibration and node-ID data through power cycles. Placed on a compact 28-SSOP footprint, it controls actuators and reads industrial sensors at 20 MHz with hardware-multiply-assisted scaling math, offering an economical 8-bit alternative to 32-bit MCUs in cost-sensitive factory floor equipment.
Recommended
Home Appliance Control
Home appliances such as dishwashers, coffee machines, and small HVAC units benefit from the ATMEGA1608-XUR's combination of 16 KB Flash for UI and motor-control firmware, 256 bytes of EEPROM for user-settings retention, and robust brown-out detection for safe state recovery after power interruptions. The 28-SSOP package suits the cost-optimized two-layer control PCBs typical of appliance design, while the -40C to +85C industrial grade covers unheated garage and outdoor installations. Configurable Custom Logic can offload button debouncing and relay sequencing from the CPU, and the Event System routes timer and comparator events without firmware overhead, keeping 20 MHz core utilization low for responsive user interfaces.
Recommended
Sensor and IoT End Nodes
For battery-conscious sensor nodes, the ATMEGA1608-XUR provides the megaAVR 0-series flexible low-power architecture, with multiple sleep modes and peripheral operation via the Event System so acquisitions can occur while the 20 MHz core sleeps. The 10-bit ADC digitizes analog sensors, and USART/SPI/I2C connectivity links digital sensors or radio modules such as sub-GHz transceivers. The 16 KB Flash holds a modest protocol stack plus OTA-style bootloader code, and the UPDI single-pin interface eases programming of assembled boards. Per Microchip's product page, the series is designed for low-power operation, making it a practical 8-bit choice for smart-home and metering endpoints that prioritize cost over compute.
Recommended
Motor Control and Fan Drivers
The ATMEGA1608-XUR suits small DC and BLDC fan or pump controllers that need PWM generation, current-limit logic, and tachometer capture. The megaAVR 0-series timers output complementary PWM channels while Configurable Custom Logic can implement hardware fault shut-down when a comparator detects overcurrent, reacting faster than firmware alone. At 20 MHz with a hardware multiplier, speed and position math for sensorless commutation runs comfortably within 16 KB of Flash. The industrial -40C to +85C temperature grade and brown-out protection ensure safe behavior in electrically noisy environments, and the 28-SSOP footprint integrates into compact driver boards alongside gate drivers or pre-driver ICs from the Microchip portfolio.
Recommended
Lighting and LED Fixtures
Dimmable LED luminaires and architectural lighting use the ATMEGA1608-XUR to generate flicker-free PWM dimming and decode DALI or dimmer-switch inputs over USART/TWI peripherals. The 16 KB Flash supports color-mixing curves and compensation firmware, while the 10-bit ADC reads analog dimmer or temperature-feedback signals for thermal fold-back protection. Configurable Custom Logic can gate PWM outputs during fault conditions independently of the CPU, improving safety in high-brightness fixtures. The industrial temperature range covers enclosed luminaires that run hot, and the compact 28-SSOP package fits LED driver PCBs where space and BOM cost are constrained, making it an economical upgrade from legacy 8-bit lamp controllers.
Recommended
Educational and Prototyping Platforms
The ATMEGA1608-XUR is well suited to education kits and prototyping boards because the megaAVR 0-series is supported by Microchip Studio/MPLAB X, the SNAP and PICkit 4 programmers, and the community MegaCoreX Arduino hardware package on GitHub, which explicitly supports ATmega1608 firmware development. UPDI programming over a single pin lowers the barrier for students assembling their first target boards, while the 16 KB Flash and 2 KB SRAM provide enough room for sensor, display, and communication exercises. The 28-pin DIP-compatible pinout logic (available in through-hole ATmega1608 package options in the same family) allows classroom boards to mirror the SSOP production part, easing transition from prototype to product.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA1608-XUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA3208-XU | ATMEGA808-XU | ATMEGA4808-XU |
|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same footprint | 28-SSOP - same footprint | 28-SSOP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 32 KB | 8 KB | 48 KB |
| Core Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| SRAM | 2 KB | 4 KB | 1 KB | 6 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Core Architecture | 8-bit AVR with hardware multiplier (megaAVR 0-series) | Identical AVR core | Identical AVR core | Identical AVR core |
| Datasheet Document | DS40002172C (shared family) | DS40002172C (shared family) | DS40002172C (shared family) | DS40002172C (shared family) |
| Temperature Grade | -40C to +85C (industrial, U grade) | -40C to +85C (U grade) | -40C to +85C (U grade) | -40C to +85C (U grade) |
| Packaging Option | Tape & Reel (XUR) | Tube/tray (XU); -XUR reel version exists | Tube/tray (XU); -XUR reel version exists | Tube/tray (XU); -XUR reel version exists |
Key Differentiators
- Balanced memory tier in the megaAVR 0-series (vs ATMEGA808-XU)
- Lower cost per unit than higher-memory siblings (vs ATMEGA3208-XU)
- Tape-and-reel ready for automated assembly (vs ATMEGA1608-XU (tube))
Design Notes
Ordering-code discipline matters on this part: ATMEGA1608-XUR (tape and reel) versus ATMEGA1608-XU (tube) are electrically identical but arrive in different packaging for automated assembly. Also distinguish package codes: the -X (28-SSOP) and -A/-M (TQFP-32/VQFN) options have different footprints and are NOT interchangeable. Verify the exact suffix against your stencil and feeder setup before release to avoid production-line mismatches.
Decouple VDD with a 100 nF ceramic capacitor placed within a few millimeters of the supply pin, plus bulk capacitance (4.7 uF to 10 uF) near the board supply entry. The megaAVR 0-series datasheet recommends solid ground planes under the MCU for ADC noise performance. Keep the UPDI programming pin routed to a accessible test point or 3-pad header on production boards so in-circuit programming with SNAP or PICkit 4 remains possible after assembly.
Estimated: average current in active mode scales roughly linearly with clock frequency on AVR cores; running the 20 MHz clock only during computation and sleeping between events can cut average system current by an order of magnitude compared to polling designs. Use the Event System and Configurable Custom Logic to keep wake-up sources autonomous, and enable brown-out detection with the reset appropriate to your supply rail to guarantee safe state recovery after power dips in industrial environments.
The 28-SSOP is a 0.65 mm pitch package; use a solder-mask-defined footprint per IPC-recommended SSOP-28 land pattern dimensions and extend traces at a 45-degree exit to aid inspection. For firmware migration within the family, keep Flash usage below roughly 80 percent (about 13 KB of the 16 KB) if you want a guaranteed drop-in path to either the smaller ATMEGA808 for cost-down or the larger ATMEGA3208 for feature growth without PCB respin.
Compliance Information
RoHS compliance per DigiKey product listing. REACH, halogen-free, and conflict-minerals status not stated in the provided data; consult Microchip's official product compliance portal for certificates.
