ATSAM4S2AB-MNR - 120MHz Cortex-M4 MCU 128KB Flash | Microchip
MPN: ATSAM4S2AB-MNR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.49 | $1.49 |
| 10 | $1.4 | $14.00 |
| 100 | $1.25 | $125.00 |
| 500 | $1.1 | $550.00 |
| 1,000 | $0.98 | $980.00 |
ATSAM4S2AB-MNR Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory (Flash for code, SRAM for data) and peripherals such as UART, SPI, I2C, timers and ADCs on one die. In the embedded-systems hierarchy, the SAM4S sits above basic 8-bit MCUs and below application processors, targeting real-time control, sensing and connectivity tasks in industrial and consumer designs.
Key features of the ATSAM4S2AB-MNR include the Cortex-M4 core with DSP instructions and a hardware FPU for efficient signal processing, up to 120 MHz operation, 128 KB of zero-wait-state Flash with dual-bank options, and a rich peripheral set including USB 2.0 Device, high-speed USDHC/SDRAM-capable bus matrix, 12-bit ADC and UART/SPI/TWI serial interfaces. Extended temperature qualification (as indicated by the M temperature grade) and a halogen-free, green QFN package support harsh and space-constrained designs.
Architecturally, the device leverages Microchip's multi-layer AHB bus matrix, allowing the CPU, USB DMA and peripheral DMA channels to operate concurrently with minimal arbitration latency. The Flash accelerator reduces effective wait states at high clock rates, while multiple low-power modes down to tens of microamps support battery-operated products. A precise on-chip regulator simplifies power-tree design.
Typical applications include industrial control panels, motor-control and power-conversion monitoring, metering, IoT sensor nodes, USB accessories, and consumer appliances - anywhere 32-bit DSP-grade performance is needed in a compact 7x7 mm footprint.
When designing with this MCU, budget PCB real estate for a solid 3.3 V rail with local decoupling on every VDD pin, and plan to program via SWD (Serial Wire Debug) or JTAG through the dedicated pins; the extended-temperature variant requires derating review at maximum ambient.
This page synthesizes distributor pricing, drop-in alternatives within the SAM4S family, and practical design notes not found on the manufacturer product page. Pricing references LCSC and DigiKey data as of 2026-09-20.
Drop-in alternatives for ATSAM4S2AB-MNR 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:
ATSAM4S2AB-ANR
β Drop-Inβ In Stock
$3.9 / Unit
View Datasheet βATSAM4S2AB-MU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAM4S4AB-MU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAM4S8AB-MU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAM4S2AB-MNR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 128 KB (128K x 8) |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Series | SAM4S |
| Package | 48-QFN (7x7 mm), exposed pad (HVQCCN) |
| Number of Terminals | 48 |
| Mounting Type | Surface Mount |
| Temperature Grade | Extended (M grade, EXT TEMP) |
| Package Code (JEDEC style) | HVQCCN, square, no-lead |
| Packaging | Tape & Reel (T&R) |
| Environmental | Green, halogen-free (QFN, GREEN) |
| Core Architecture | RISC |
| On-chip Peripherals | USB 2.0 Device, DMA, timers, UART/SPI/TWI, ADC |
| RoHS Status | Compliant (green package) |
ATSAM4S2AB-MNR hvqccn, square, no-lead Pin Configuration Guide
Pin configuration for ATSAM4S2AB-MNR (hvqccn, square, no-lead 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 ATSAM4S2AB-MNR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4S2AB-MNR is suitable for 6 applications: Industrial Control and Automation, USB Accessories and Peripherals, Motor Control and Power Conversion, Metering and Smart Sensors, IoT Sensor Nodes and Gateways, Consumer Appliances and White Goods.
Industrial Control and Automation
The ATSAM4S2AB-MNR fits industrial control nodes because its 120 MHz Cortex-M4 core with DSP instructions handles real-time control loops while the extended temperature grade survives hot cabinets. Its 128 KB Flash is sufficient for protocol stacks (Modbus, CAN-adjacent serial protocols over UART) plus a small RTOS, and the multi-layer bus matrix keeps the CPU responsive while DMA services serial links. In a typical use, the MCU polls sensors via SPI or TWI, executes a control algorithm, and reports status over RS-485 via UART with modest CPU load under 30%.
Recommended
USB Accessories and Peripherals
The integrated USB 2.0 full-speed Device port plus peripheral DMA makes the ATSAM4S2AB-MNR a compact single-chip solution for USB HID devices, CDC virtual COM adapters and vendor-specific USB instruments. At 120 MHz, enumeration and bulk transfers leave ample CPU headroom, and the 7x7 mm QFN keeps hardware minimal - no external USB controller is needed. A typical design uses the on-chip transceiver with a 1.5 k pull-up handled internally, 12 MB/s-class effective throughput for device-class traffic, and the 128 KB Flash stores descriptors, firmware logic and optional mass-storage tables.
Recommended
Motor Control and Power Conversion
For BLDC/PMSM control and power-conversion monitoring, the ATSAM4S2AB-MNR combines a hardware FPU, DSP multiply-accumulate instructions and PWM-capable timers to execute field-oriented control at the 120 MHz clock with fast interrupt latency. The 12-bit ADC with DMA captures phase currents, and the Cortex-M4 pipeline completes a current loop iteration within tens of microseconds. The extended temperature grade adds margin in hot enclosures near drives. Firmware for sensorless observers (sliding-mode or SMO) fits comfortably within 128 KB Flash, leaving room for a communication stack.
Recommended
Metering and Smart Sensors
Smart meters and industrial sensors benefit from the SAM4S low-power modes: per Microchip, SAM4S family consumption falls to the 180 uA/MHz class in active mode with sleep/backup modes for battery duty cycles. The 12-bit ADC samples voltage and current channels, and the DSP instructions accelerate RMS and FFT-based harmonic analysis needed for energy-accuracy compliance. The 1.62-3.6 V supply range allows direct operation from a 3.6 V lithium cell, and the 48-QFN footprint suits dense meter PCBs. The extended temperature M grade covers outdoor meter cabinets.
Recommended
IoT Sensor Nodes and Gateways
As an IoT node controller, the ATSAM4S2AB-MNR bridges local sensors and a wireless module: the MCU handles sampling, filtering and protocol framing over UART/SPI to a radio, while the 120 MHz core performs data compression or edge filtering with FPU support. The 128 KB Flash stores application plus OTA-style update bootloaders typical of node firmware, and dual-purpose GPIO allows I2C sensor trees. The 7x7 mm QFN fits coin-cell-sized boards, and the exposed pad provides a solid ground return that improves EMI performance for co-located radios.
Recommended
Consumer Appliances and White Goods
Appliance control boards use the ATSAM4S2AB-MNR for user-interface scanning (capacitive or matrix keys via GPIO/TWI), motor and heater control via PWM, and communication to displays. The green halogen-free QFN package aligns with consumer environmental requirements, and the 1.62-3.6 V rail integrates with standard appliance 3.3 V logic. At 120 MHz, a single MCU can run UI, safety monitoring and a serial link to a display or main controller simultaneously; the 128 KB Flash accommodates localization tables and UI graphics data. The extended temperature grade tolerates oven-adjacent compartments.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4S2AB-MNR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S2AB-ANR | ATSAM4S2AB-MU | ATSAM4S4AB-MU | ATSAM4S8AB-MU |
|---|---|---|---|---|---|
| Package | 48-QFN (7x7 mm), exposed pad | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Clock | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz | Cortex-M4, 120 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 512 KB |
| Supply Voltage | 1.62 V - 3.6 V | 1.62 V - 3.6 V | 1.62 V - 3.6 V | 1.62 V - 3.6 V | 1.62 V - 3.6 V |
| Temperature Grade | Extended (M grade, EXT TEMP) | Industrial (A grade) | Industrial (per ordering code) | Industrial | Industrial |
| USB Device Port | Yes (USB 2.0 full-speed) | Yes | Yes | Yes | Yes |
Key Differentiators
- Extended temperature grade in QFN, GREEN package (vs ATSAM4S2AB-ANR)
- Identical footprint with built-in Flash upgrade path (vs ATSAM4S4AB-MU)
- Cortex-M4 FPU/DSP at low MCU-class pricing (vs ATSAM3N4BA-MU)
Design Notes
Place one 100 nF ceramic capacitor at every VDD/VDDIO pin pair, within 2 mm of the pin, plus at least one 4.7-10 uF bulk capacitor near the supply entry. Solder the 48-QFN exposed pad to a grounded thermal land with an array of vias - it is both the thermal relief and a major ground return; an unsoldered pad degrades ground integrity and EMI performance. Keep the USB D+/D- pair routed as a 90-ohm differential pair with length matching.
The SAM4S accepts 1.62-3.6 V on VDDIO and generates the core supply with an internal regulator; do not force external supplies onto core pins. Estimated: at 120 MHz active operation the family draws on the order of 180 uA/MHz, so a fully active part consumes roughly 20-25 mA - size the 3.3 V regulator for this plus GPIO loads, not just sleep current. For battery designs, exploit Wait/Sleep/Backup modes and confirm wake-up latency for UART traffic.
Program via SWD pins (SWDIO/SWCLK); do not repurpose them as GPIO unless your production flow supports recovering a locked part. When substituting densities (e.g., moving to ATSAM4S4AB-MU), regenerate the linker script and confirm Flash wait-state/accelerator settings in the startup code - code validated at 128 KB may silently mis-configure Flash timing on larger dies. Also verify the temperature code: the -MNR extended-temperature part is rated differently from the -ANR industrial part.
Compliance Information
Mouser lists the part as 'QFN, GREEN' - Microchip's GREEN designation denotes a green, halogen-free, RoHS-compliant and lead-free package. REACH and conflict-minerals declarations not stated in provided data.
