ATSAM4N16BA-MUR - 100MHz Cortex-M4, 1MB Flash MCU | Microchip
MPN: ATSAM4N16BA-MUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.41 | $5.41 |
| 10 | $4.95 | $49.50 |
| 100 | $4.55 | $455.00 |
| 500 | $4.15 | $2,075.00 |
| 1,000 | $3.8 | $3,800.00 |
ATSAM4N16BA-MUR Overview
A microcontroller (MCU) is a single-chip computer combining a processor core, memory, and peripherals on one die; within the power/performance hierarchy, the SAM4N sits above Cortex-M0+ families such as SAM3N and below the high-throughput SAM4E/S series, making it a general-purpose industrial MCU for cost-sensitive 32-bit designs.
Key features include the 100 MHz Cortex-M4 core with hardware DSP instructions for efficient signal processing, 1 MB of zero-wait-state flash for large code images, pin-to-pin compatibility with the SAM3N, SAM3S, SAM4S (64/100-pin) and SAM7S legacy 64-pin products, and an industrial temperature rating of -40C to +85C. The green, RoHS-compliant QFN package supports lead-free reflow assembly.
Architecturally, the SAM4N employs an ARMv7E-M Cortex-M4 core with a nested vectored interrupt controller (NVIC) and MPU for functional robustness. Analog capability includes 10-bit ADC peripherals, while serial connectivity covers UART, SPI, I2C/TWI interfaces typical of the SAM4N family.
Typical applications include industrial control and automation nodes, consumer appliance interfaces, and building/lighting control where 1 MB of flash enables OTA-updatable firmware without external memory.
Design consideration: supply the part at 3.3V for maximum peripheral performance, and verify the 64-pin QFN land pattern against the exposed-pad footprint for reliable ground return.
This page synthesizes distributor pricing, drop-in cross-references within the SAM family, and practical sourcing data not found in the manufacturer datasheet.
Drop-in alternatives for ATSAM4N16BA-MUR 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 ATSAM4N16BA-MUR (same form factor and footprint) β differing in RoHS Status, Core Processor, Maximum Clock Frequency, Flash Memory, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAM4S16BA-MUR
β Drop-Inπ Reference alternative (not in catalog)
ATSAM4LC8BA-UUR
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.95 / Unit
View Datasheet βATSAM3S8BA-MUR
β Drop-Inβ In Stock
$5.15 / Unit
View Datasheet βATSAM3N4BA-MU
β Drop-Inβ In Stock
$3.48 / Unit
View Datasheet βATSAM4S8BA-MUR
β Drop-Inπ Reference alternative (not in catalog)
ATSAM4N16BA-MUR Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 100 MHz |
| Flash Memory | 1 MB (1M x 8) |
| SRAM | 80 KB |
| Instruction Set | Thumb-2 with DSP instructions |
| Memory Protection | MPU (Memory Protection Unit) |
| Supply Voltage | 1.62 V to 3.6 V (2.5V/3.3V typical) |
| Package | 64-QFN (9x9 mm) with Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| ADC Resolution | 10-bit |
| Packaging | Tape & Reel (T/R) |
| Pin Compatibility | Pin-to-pin compatible with SAM3N, SAM3S, SAM4S (64-pin) and SAM7S (64-pin) |
| Series | SAM4N (ATSAM4N16B) |
| RoHS Status | Compliant (GREEN) |
ATSAM4N16BA-MUR 64-qfn (9x9 mm) with exposed pad Pin Configuration Guide
Pin configuration for ATSAM4N16BA-MUR (64-qfn (9x9 mm) with 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 ATSAM4N16BA-MUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4N16BA-MUR is suitable for 6 applications: Industrial Control and Automation, Building and Lighting Control, Consumer Appliances and White Goods, Portable and Battery-Powered Devices, Sensor Hubs and IoT Edge Nodes, Test and Measurement Instrumentation.
Industrial Control and Automation
Factory automation nodes, PLC I/O modules, and motor control interfaces benefit directly from the ATSAM4N16BA-MUR's 100 MHz Cortex-M4 core and DSP instructions, which accelerate control-loop math such as PID and FFT-based condition monitoring. The 1 MB Flash accommodates large protocol stacks (Modbus, CAN-based layers) plus field-updatable firmware images without external memory, and the 80 KB SRAM buffers communication and measurement data. Operating from -40C to +85C, the industrial-graded 64-QFN survives cabinet-mounted environments. The MPU enables functional partitioning of safety-relevant firmware from application code, while pin compatibility with SAM3N/SAM3S/SAM4S lets one PCB platform scale from cost-optimized to feature-rich variants without redesign.
Recommended
Building and Lighting Control
DALI/DMX lighting controllers and building automation sensors fit the ATSAM4N16BA-MUR because its 1 MB Flash holds full lighting protocol stacks, scene tables, and OTA bootloader with headroom, and the 100 MHz core handles multiple dimming channels with precise timing via hardware timers. The 1.62V to 3.6V supply range supports 3.3V or battery-backup rails directly, and the industrial temperature rating covers ceiling and fixture-mounted environments. Its 10-bit ADC reads occupancy sensors, potentiometers, and ambient-light inputs without an external converter. The 64-QFN exposed-pad package provides solid thermal and ground performance for continuous 24/7 operation, while pin compatibility with SAM3S allows fixture platforms to be cost-down migrated across product tiers.
Recommended
Consumer Appliances and White Goods
Washers, cooktops, and small appliances use the ATSAM4N16BA-MUR as the main control MCU where its 1 MB Flash supports rich HMI firmware, multi-language UIs, and self-diagnostic code, and the 100 MHz Cortex-M4 with DSP instructions executes real-time motor commutation algorithms such as sensorless BLDC FOC. The 10-bit ADC digitizes user controls, temperature probes, and current-sense feedback, while the MPU isolates safety monitoring routines. The green RoHS 64-QFN package meets consumer environmental requirements, and the reduced-BOM-cost positioning of the SAM4N series keeps unit cost low at consumer volumes. Supplying from a 3.3V rail derived from the appliance power supply keeps the analog front end simple and noise-tolerant.
Recommended
Portable and Battery-Powered Devices
Handheld instruments and portable data loggers leverage the ATSAM4N16BA-MUR's wide 1.62V to 3.6V operating range, which permits direct powering from two alkaline cells or a single lithium cell without a regulator, reducing BOM cost and quiescent losses. The SAM4N's low-power operating and sleep modes extend battery life in duty-cycled acquisition systems, and the Cortex-M4 DSP instructions enable on-device signal processing (filtering, FFT) that reduces radio or storage payload size. The 80 KB SRAM buffers sensor streams between wake events, and 1 MB Flash retains logging code plus wear-leveling data structures. The compact 9x9 mm QFN conserves PCB area in handheld enclosures, and pin compatibility supports a common core board across product families.
Recommended
Sensor Hubs and IoT Edge Nodes
IoT edge nodes and sensor hubs use the ATSAM4N16BA-MUR to aggregate multi-sensor inputs, pre-process data, and feed a connectivity module. The 100 MHz Cortex-M4 applies digital filtering and threshold logic locally so only event data is transmitted, cutting network power; DSP instructions accelerate vibration and audio feature extraction. The 10-bit ADC samples analog sensors while hardware serial interfaces (UART, SPI, TWI) connect digital sensors and a radio module such as a Wi-Fi or LoRa transceiver. The 1 MB Flash stores dual firmware banks for secure over-the-air updates with rollback, and the MPU partitions the wireless stack from application logic. The 64-QFN footprint keeps the node small enough for retrofit sensor enclosures.
Recommended
Test and Measurement Instrumentation
Benchtop accessories, panel meters, and handheld test tools employ the ATSAM4N16BA-MUR where its 100 MHz Cortex-M4 executes calibration math and UI rendering, and DSP instructions accelerate waveform math such as RMS, THD estimation, and digital filtering of the 10-bit ADC streams. The 1 MB Flash holds a full menu-driven interface, multi-range calibration tables, and a USB- or UART-based firmware-update bootloader, while 80 KB SRAM provides capture buffers. The industrial temperature rating maintains accuracy specifications in workshop environments, and the exposed-pad QFN delivers a low-impedance ground that reduces analog front-end noise. Pin compatibility with SAM4S allows an upgrade path to USB-connected variants without PCB respin.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4N16BA-MUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S16BA-MUR | ATSAM3S8BA-MUR | ATSAM3N4BA-MU | ATSAM4S8BA-MUR |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) EP | 64-QFN (9x9 mm) EP - same | 64-QFN (9x9 mm) EP - same | 64-QFN - same | 64-QFN (9x9 mm) EP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4 with DSP | ARM Cortex-M4 with DSP | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M4 with DSP |
| Max Clock Frequency | 100 MHz | 120 MHz | 96 MHz | 96 MHz | 120 MHz |
| Flash Memory | 1 MB | 1 MB | 512 KB | 512 KB | 512 KB |
| SRAM | 80 KB | 128 KB | 96 KB | 96 KB | 64 KB |
| USB Device Port | No | Yes | Yes | No | Yes |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
Key Differentiators
- Largest flash in the pin-compatible SAM3/SAM4 64-pin family (vs ATSAM3S8BA-MUR)
- Lower BOM cost than USB-equipped equivalent (vs ATSAM4S16BA-MUR)
- Trade-off: no USB and lower top clock than SAM4S (vs ATSAM4S8BA-MUR)
Design Notes
Power the ATSAM4N16BA-MUR from a clean 3.3V rail within its 1.62V to 3.6V range. Decouple every VDDIO pin with 100 nF ceramic capacitors placed within 2 mm of each pin, plus bulk 4.7-10 uF near the part; connect the exposed pad directly to the ground plane for low-inductance return. If VDDCORE is externally supplied per the SAM4N power scheme, follow the datasheet's recommended LC filter for core-rail noise. Avoid routing switching-regulator traces under the QFN to keep ADC readings clean.
The 64-QFN (9x9 mm) with exposed pad requires a footprint with an appropriate thermal-via array (typically 4x4 via matrix under the pad) tied to the ground plane to ensure reliable soldering and heat transfer. Use non-solder-mask-defined (NSMD) pads per Microchip's package outline drawing, and verify the land pattern against the latest SAM4N datasheet revision before PCB release. Pin-to-pin compatibility with SAM3N/SAM3S/SAM4S 64-pin parts means one footprint can serve multiple BOM tiers - confirm mechanical equivalence with the package outline drawings of any second-source variant.
When migrating firmware from a pin-compatible SAM3S or SAM3N to the SAM4N, remember the core changes from Cortex-M3 to Cortex-M4: recompile with the correct device header and startup files, and verify peripheral clock configurations since maximum bus speeds differ. Do not exceed 100 MHz on the ATSAM4N16B even though pin-compatible SAM4S parts run up to 120 MHz. Finally, the -MUR suffix denotes matte-tin, tape-and-reel packing with industrial temperature coding - order the correct suffix for reflow profiles and MSL bake requirements.
Keep high-speed clock lines (main crystal or external oscillator) short and guarded by ground, since the 100 MHz core generates significant harmonic content. For ADC measurements, route analog sensor signals away from digital buses and use the SAM4N's separate analog supply pins with dedicated decoupling and an RC filter from the digital rail. Series-terminate SPI lines running near maximum peripheral clock to reduce ringing on the exposed-pad QFN's low-inductance returns.
Compliance Information
Mouser lists the part as 'QFN, GREEN, IND TEMP, MRL A' - GREEN denotes Microchip RoHS-compliant, halogen-free packaging with lead-free matte-tin finish. Formal REACH and conflict-minerals declarations should be requested from Microchip.
