ATMEGA16-16MQR - 16MHz AVR 16KB Flash MCU | Microchip
MPN: ATMEGA16-16MQR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.37 | $2.37 |
| 10 | $2.13 | $21.30 |
| 100 | $1.63 | $163.00 |
| 500 | $1.46 | $730.00 |
| 1,000 | $1.32 | $1,320.00 |
ATMEGA16-16MQR Overview
An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most of its 131 powerful instructions in a single clock cycle, positioning it within the broader hierarchy of embedded MCUs: microcontroller -> 8-bit MCU -> AVR family -> ATmega series. The ATmega16 sits in the mid-range of this family, bridging small ATmega8-class devices and the larger ATmega32/ATmega128 parts.
Key features include 32 programmable I/O lines, an 8-channel 10-bit ADC, a JTAG interface for on-chip debugging and boundary scan, plus brown-out detect, power-on reset, PWM, and watchdog timer peripherals. Connectivity covers SPI, I2C (TWI), and UART/USART, enabling straightforward integration with sensors, memories, and communication modules.
Technically, the advanced RISC architecture pairs 32 general-purpose working registers with a single-cycle ALU, delivering deterministic execution that simplifies real-time firmware timing. In-system self-programming via boot-loader support allows field firmware updates without a external programmer socket cycle.
Typical applications include industrial control panels, automotive body electronics, motor control auxiliaries, and instrumentation front ends where the 10-bit ADC and robust peripherals reduce external component count.
Design consideration: the 16MHz speed grade requires a supply of 4.5V to 5.5V; lower-voltage designs must downgrade to slower speed grades.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA16-16MQR 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 ATMEGA16-16MQR (same form factor and footprint) β differing in Debug Interface, Flash Program Memory, Package, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA16A-MUR
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA16-16MJ
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.72 / Unit
View Datasheet βATMEGA32-16MUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA8535-16MUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA164A-MUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA16-16MQR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-bit |
| Speed | 16 MHz |
| Flash Program Memory | 16 KB |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Number of I/O | 32 |
| Supply Voltage (Vcc/Vdd) | 4.5 V to 5.5 V |
| Data Converters | A/D 8x10-bit |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Debug Interface | JTAG for on-chip debug |
| Throughput | Up to 16 MIPS at 16 MHz |
| Instruction Set | 131 instructions, mostly single-cycle |
| Package | 44-VFQFN Exposed Pad |
| Mounting Style | Surface Mount |
| RoHS Status | Compliant |
ATMEGA16-16MQR 44-vfqfn exposed pad Pin Configuration Guide
Pin configuration for ATMEGA16-16MQR (44-vfqfn exposed pad 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 ATMEGA16-16MQR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA16-16MQR is suitable for 6 applications: Industrial Control Panels, Motor Control Auxiliary Logic, Automotive Body Electronics, Test and Measurement Instrumentation, Embedded Networking Nodes, Home Appliance Control.
Industrial Control Panels
The ATMEGA16-16MQR fits industrial control panels because its 5V-tolerant I/O, brown-out reset, and watchdog timer provide the fault tolerance these environments demand, while 32 I/O lines drive relays, indicators, and read push-button matrices without port expanders. The 8-channel 10-bit ADC samples potentiometers, current shunts via amplifiers, and temperature sensors at no extra BOM cost. Its 16MHz AVR core executes deterministic single-cycle instructions, simplifying scan-cycle timing guarantees in PLC-style polling loops. Placed on a 44-VFQFN exposed-pad footprint bonded to the ground plane, it also gains EMI robustness for electrically noisy cabinets with contactors and switching supplies.
Recommended
Motor Control Auxiliary Logic
In motor-driven systems, the ATMEGA16-16MQR handles supervisory duties: sequencing, current monitoring through the 10-bit ADC, fault latching, and PWM generation at up to 16MHz clock resolution. Its four hardware PWM channels drive low-side MOSFET drivers or adjust DC motor speed with 8-bit or 10-bit resolution, while the UART reports status to a supervisory controller. Brown-out detection prevents corrupted EEPROM calibration data during supply dips, and the JTAG interface enables on-chip debugging during commissioning. The 44-VFQFN exposed pad ties the die directly to the ground pour, containing switching noise near the power stage.
Recommended
Automotive Body Electronics
For non-safety automotive body functions such as lighting control, mirror adjustment, and seat-position memory, the ATMEGA16-16MQR offers 5V I/O robustness, a watchdog timer, and EEPROM storage for learned positions and configuration. The 8-channel 10-bit ADC reads switch packs and analog feedback pots directly. Its self-programming Flash enables end-of-line configuration flashing over the UART. Where the end-customer specification requires formal AEC-Q100 qualification, select the temperature-graded ATMEGA16-16MJ variant in the identical footprint instead; board layouts can be shared between the two, reducing qualification rework on the PCB side.
Recommended
Test and Measurement Instrumentation
Bench instruments and portable meters benefit from the ATMEGA16-16MQR's 8-channel 10-bit ADC, JTAG on-chip debug, and generous 32 I/O lines for driving multiplexed segment displays and reading keypads. The 16MHz single-cycle core provides responsive front-panel handling while a UART links readings to a PC. The exposed-pad VFQFN package grounds the die to reduce analog ground bounce, improving ADC effective resolution when combined with careful analog layout around AREF and AVCC. Firmware updates in the field are practical through the self-programming Flash boot-loader, extending product service life without hardware recalls.
Recommended
Embedded Networking Nodes
The ATMEGA16-16MQR integrates SPI, I2C (TWI), and UART/USART on one die, making it a compact gateway node between sensors, EEPROMs, real-time clocks, and RS-485 or RS-232 field buses. Its 16KB Flash accommodates protocol stacks for Modbus-RTU class applications, while 1KB SRAM buffers frames. The 5V I/O directly interfaces legacy industrial transceivers without level shifting, cutting BOM cost versus 3.3V MCUs. Brown-out reset plus watchdog ensure autonomous recovery in unattended installations. The 44-VFQFN exposed pad simplifies a solid ground reference for the transceiver and MCU, improving bus signal integrity in electrically harsh environments.
Recommended
Home Appliance Control
Appliance control boards - washers, cooktops, ventilation - use the ATMEGA16-16MQR for its combination of ADC-based knob/sensor reading, PWM triac or fan control, and EEPROM storage of user presets. Its 5V supply rails match legacy appliance power supplies derived from transformer secondaries, and the watchdog with brown-out detection guarantees safe state recovery after mains disturbances. The 44-VFQFN footprint saves board area versus DIP versions, allowing one control PCB to serve multiple appliance models with different firmware. JTAG-based debug shortens firmware development cycles for the multi-iteration UI tuning typical in appliance projects.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA16-16MQR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA16A-MUR | ATMEGA16-16MJ | ATMEGA32-16MUR | ATMEGA8535-16MUR | ATMEGA164A-MUR |
|---|---|---|---|---|---|---|
| Package | 44-VFQFN Exposed Pad | 44-VFQFN Exposed Pad - same | 44-VFQFN Exposed Pad - same | 44-VFQFN Exposed Pad - same | 44-VFQFN Exposed Pad - same | 44-VFQFN Exposed Pad - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B | 1 KB |
| Max Speed | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 20 MHz |
| JTAG On-Chip Debug | Yes | Yes | Yes | Yes | Yes | Yes (debugWIRE/JTAG variant dependent) |
| Supply Voltage | 4.5 V - 5.5 V | 4.5 V - 5.5 V | 4.5 V - 5.5 V | 4.5 V - 5.5 V | 4.5 V - 5.5 V | 1.8 V - 5.5 V (picoPower) |
| Firmware Compatibility | Baseline (ATmega16 register set) | Recompile only - functionally identical per AVR522 | Binary compatible | Recompile; register-compatible core | Peripheral differences - recheck | Register mapping differs - port required |
Key Differentiators
- Baseline ATmega16 register set with zero porting effort (vs ATMEGA164A-MUR)
- 5V-native I/O for legacy industrial rails (vs ATMEGA164A-MUR)
- JTAG on-chip debug plus boundary scan at mid-range price (vs ATMEGA8535-16MUR)
Design Notes
The 16MHz speed grade requires 4.5V to 5.5V supply per the ATmega16 operating envelope. Decouple VCC and AVCC separately with 100nF ceramic capacitors placed within 5mm of each pin, plus a 10uF bulk capacitor per supply domain. Do not tie AVCC to VCC through long traces - route a filtered branch, optionally through a small ferrite bead, to preserve the 10-bit ADC's effective resolution. Enable brown-out detection at the appropriate threshold fuse setting so EEPROM writes are never performed during supply collapse.
The 44-VFQFN exposed pad must be soldered to a grounded thermal via array - typically a 3x3 pattern of 0.3mm vias under the pad - both for thermal relief and for EMI containment. QFN center pads are prone to voiding: use a windowed solder-mask defined pad with roughly 70% paste coverage and follow the stencil guidance in Microchip's QFN assembly application notes. Keep the crystal within 10mm of XTAL1/XTAL2 with guard ground, and place ISP header and JTAG connectors at the board edge for production access.
A frequent migration pitfall: code compiled for ATMEGA16 does not run unmodified on ATMEGA164A-MUR despite the pin-compatible footprint, because peripheral register names and locations changed between generations. Always recompile against the exact target device signature and re-verify fuse bits - notably JTAGEN and SPIEN - which are factory enabled on the ATmega16 and can silently disable port C pins if mishandled. When substituting ATMEGA16A, re-check ADC and BOD electrical characteristics since the newer process shifts them slightly per appnote AVR522.
Compliance Information
RoHS compliance indicated in distributor listings for ATMEGA16-16MQR. For AEC-Q100 qualified automotive variants, evaluate ATMEGA16-16MJ.
