ATMEGA1608-AUR - 8-bit AVR MCU 20MHz 16KB Flash TQFP-32 | Microchip
MPN: ATMEGA1608-AUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.32 | $1.32 |
| 10 | $1.18 | $11.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.98 | $490.00 |
| 1,000 | $0.92 | $920.00 |
ATMEGA1608-AUR Overview
An 8-bit microcontroller is an integrated circuit that contains a processor core, memory, and programmable peripherals on a single chip, executing code that processes data 8 bits at a time. Within the semiconductor hierarchy, the ATmega1608 sits in the MCU category under embedded processors, and within Microchip's AVR product line under the megaAVR 0-series, which targets general-purpose embedded control designs.
Key features include the AVR RISC core with a hardware multiplier executing most instructions in a single clock cycle, 20 MHz maximum operating frequency, and Core Independent Peripherals (CIPs) that operate without CPU intervention, reducing latency and code complexity. The 16 KB self-programmable Flash, 2 KB SRAM and 256 B EEPROM provide a balanced memory footprint for small-to-medium control applications.
Technical depth: the megaAVR 0-series uses the modern AVR core with single-cycle I/O access, an event system for peripheral-to-peripheral signaling, and support for functional safety development, making it suitable for designs where safety documentation and diagnostics matter. Supply operation is in the 5 V class typical of the series.
Typical applications include industrial control and automation nodes, home appliances, and general embedded systems requiring robust 8-bit control with CIP-based real-time behavior.
Design consideration: the device is programmed via UPDI (Unified Program and Debug Interface), so plan for a single-pin programming header rather than legacy ISP connectors.
This page synthesizes verified distributor data, drop-in family alternatives, pricing context, and practical design guidance not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA1608-AUR 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-AUR (same form factor and footprint) β differing in Core Processor, 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 βATMEGA3208-AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA4808-AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA808-AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA1608-AUR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR (8-bit RISC with hardware multiplier) |
| Core Size | 8-Bit |
| Max Operating Frequency | 20 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| EEPROM | 256 B |
| Series | megaAVR 0-series, Functional Safety (FuSa) |
| Peripherals | Core Independent Peripherals (CIPs), hardware multiplier |
| Package | 32-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Programming Interface | UPDI |
| Product Status | Active |
ATMEGA1608-AUR 32-tqfp (7x7 mm) Pin Configuration Guide
Pin configuration for ATMEGA1608-AUR (32-tqfp (7x7 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-AUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA1608-AUR is suitable for 6 applications: Industrial Control and Automation, Home Appliances, Sensor Nodes and IoT Endpoints, Motor Control (Small Fan/Pump), Building Automation and HVAC, Test and Measurement Fixtures.
Industrial Control and Automation
The ATMEGA1608-AUR fits industrial control nodes where deterministic behavior and 5 V-level I/O are required: its 20 MHz AVR core with hardware multiplier handles PID loops and protocol handling, while the megaAVR 0-series Core Independent Peripherals let timers, communication modules and the event system run without CPU intervention, cutting interrupt latency. Its 16 KB Flash and 2 KB SRAM comfortably host Modus RTU-style serial logic, sensor filtering and relay sequencing. In a control PCB the MCU typically sits between isolated RS-485 front ends and driver circuitry, with the event system chaining comparator or timer outputs directly to outputs for fail-safe fast response. The Functional Safety (FuSa) support of the series aids documentation and diagnostics for machinery designs.
Recommended
Home Appliances
Appliance control boards benefit from the ATMEGA1608-AUR's 5 V-class operation, which interfaces directly with buttons, LEDs, triacs and relay coils without level shifting. The 16 KB Flash accommodates user-interface state machines, display multiplexing and safety interlock logic, while 256 bytes of EEPROM retain user settings and cycle counters across power cycles. Core Independent Peripherals generate PWM for heaters or fan motors and debounce inputs autonomously, keeping firmware timing simple. Because the same package and pinout is shared with the 32 KB and 48 KB siblings (ATMEGA3208/4808), a single appliance PCB can be scaled across product tiers by swapping the MCU, protecting software investment and simplifying procurement across model lines.
Recommended
Sensor Nodes and IoT Endpoints
For wired sensor nodes, the ATMEGA1608-AUR provides a balanced memory and peripheral set: a 12-bit-class analog front end on the megaAVR 0-series plus hardware USART/SPI/I2C for data offload, all within 2 KB SRAM sufficient for buffering and filtering. Running from a 5 V rail it directly powers common industrial sensors; the event system routes ADC completion to processing with minimal CPU wakeups, extending duty-cycled power budgets. Firmware for the whole megaAVR 0-series family is shared, so the same sensor application scales across the 8 KB ATMEGA808 through 48 KB ATMEGA4808 in the identical TQFP-32 footprint. UPDI single-wire programming allows field reprogramming through a single connector pin in sealed enclosures.
Recommended
Motor Control (Small Fan/Pump)
Small fan and pump applications use the ATMEGA1608-AUR's timer PWM outputs, optionally through a complementary waveform generator on the megaAVR 0-series, to drive gate drivers or low-side switches. The 20 MHz single-cycle core computes speed-control loops with the hardware multiplier, and Core Independent Peripherals keep PWM running even during firmware housekeeping, preventing glitches at low duty cycles. The 16 KB Flash leaves room for tachometer processing, stall detection and UART diagnostics. The event system can gate PWM outputs off on comparator trips, providing a hardware fast path for over-current protection that does not depend on interrupt latency, an important consideration in cost-sensitive motor boards without dedicated protection ICs.
Recommended
Building Automation and HVAC
HVAC controllers rely on the ATMEGA1608-AUR's EEPROM for setpoint and calibration storage, its 16 KB Flash for scheduling and communication logic, and its USART/SPI for connecting to displays or RS-485 transceivers. The 5 V-class I/O directly reads NTC sensors and drives dampers or relays through driver stages, and Core Independent Peripherals handle background timing of valve positioning without CPU supervision. Functional Safety (FuSa) support in the megaAVR 0-series assists with documentation for safety-relevant control loops such as freeze protection. Because all 32-pin family members share one footprint, a common controller PCB can serve furnace, ventilation and heat-pump variants with different firmware images and memory sizes.
Recommended
Test and Measurement Fixtures
Bench fixtures and production test rigs use the ATMEGA1608-AUR as a low-cost controller for relay matrices, UART-based DUT communication and pass/fail logic. The 20 MHz core with hardware multiplier executes checksum and scaling math quickly, 2 KB SRAM buffers captured serial streams, and the UPDI interface allows firmware updates between test revisions over a single wire. Core Independent Peripherals generate precise stimulus timing using the event system, so waveform toggles do not jitter with software load. The Tape & Reel ATMEGA1608-AUR ordering code suits in-house pick-and-place assembly of fixture boards, and pin-compatible family variants let engineering standardize on one PCB design across multiple fixture types.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA1608-AUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA1608-AFR | ATMEGA3208-AUR | ATMEGA4808-AUR | ATMEGA808-AUR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Core / Speed | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB | 48 KB | 8 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 6 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 128 B |
| Functional Safety (FuSa) Support | Yes | Yes | Yes | Yes | Yes |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) |
Key Differentiators
- Balanced 16 KB Flash at family-mid cost (vs ATMEGA3208-AUR)
- More memory headroom than the entry part at same footprint (vs ATMEGA808-AUR)
- Identical footprint enables single-PCB family strategy (vs ATMEGA4808-AUR)
Design Notes
The 32-TQFP (7x7 mm) footprint requires a standard 0.8 mm pitch land pattern; use a 7x7 mm courtyard with thermal relief on any exposed copper under the package. Because the megaAVR 0-series shares its pinout across the ATmega808/1608/3208/4808 32-pin members, lay out one PCB that accepts any family member and add 0-ohm or DNP options where pin muxing differs in your design. Place 100 nF decoupling capacitors within 2 mm of the VDD pins, one per supply pin, plus bulk 4.7-10 uF near the regulator.
This device programs only through UPDI (Unified Program and Debug Interface); legacy SPI ISP and debugWIRE connectors will not work. Reserve one header pin routed to the UPDI pin (with series resistor per Microchip recommendations if it doubles as a GPIO) rather than a 6-pin ISP header. Also note the R-series ordering-code differences: the -AUR suffix denotes Tape & Reel and the -AFR variant a different quality/temperature designation - confirm the exact suffix required by your production flow before ordering reels.
The ATmega1608 runs from an internal oscillator option as well as external clocks; if precise UART timing is needed above basic accuracy, verify the clock source error budget against the target baud rate tolerance (typically a few percent for 8N1). Keep the UPDI trace short and away from switching nodes such as MOSFET gate nets, since it is a shared debug/GPIO pin. The event system routes internal signals, so external routing is unaffected, but keep crystal/external clock traces guarded if used.
Estimated: budget supply current from the active-mode draw at 20 MHz plus I/O loads; at 5 V the dynamic current scales roughly linearly with frequency, so a 20 MHz active node with 20 mA of I/O drive typically needs a 50-100 mA rail. Provide local bulk capacitance (4.7-10 uF) plus per-pin 100 nF ceramics. Use the peripherals' sleep and event-driven wake features to reduce average consumption in battery-backup or standby states.
Compliance Information
Compliance statements were not present in the verified web data for this exact ordering code. Obtain RoHS/REACH certificates from the Microchip product page or distributor compliance portal before production release.
