ATSAMD11D14A-MNT - 32-bit ARM Cortex-M0+ MCU, 48MHz, 16KB Flash | Microchip
MPN: ATSAMD11D14A-MNT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.85 | $18.50 |
| 100 | $1.62 | $162.00 |
| 500 | $1.4 | $700.00 |
| 1,000 | $1.2 | $1,200.00 |
ATSAMD11D14A-MNT Overview
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ microcontroller is an ultra-low-power 32-bit processor core designed by ARM Holdings and licensed to silicon vendors like Microchip. It belongs to the Cortex-M family of microcontrollers -> microcontrollers -> embedded processors -> integrated circuits. The M0+ core targets energy-efficient applications with a stripped-down instruction set, deterministic interrupt handling, and optional single-cycle I/O access, making it a popular entry point for cost-sensitive ARM designs.
The ATSAMD11D14A-MNT integrates a full-speed USB 2.0 device controller, a six-channel DMA controller, a 32-bit RTC, two 16-bit Timer/Counters, and one 24-bit Timer/Counter for Control (TCC), up to 22 programmable I/O pins, and a 12-bit ADC with up to 350 ksps sampling rate. Its Serial Communication Interface (SERCOM) block provides up to six configurable channels for I2C, SPI, or UART, enabling flexible peripheral expansion without dedicated silicon.
The device operates from 1.6 V to 3.6 V supply voltage and supports industrial temperature ranges. The integrated USB transceiver and on-chip PHY eliminate the need for external USB components, simplifying hardware design for HID, CDC, or vendor-class USB devices. The 24-QFN package provides excellent thermal performance for a small-footprint MCU.
Typical applications include USB human-interface devices (HID), USB-to-serial converter dongles, low-power sensor hubs, home automation controllers, consumer electronics with USB connectivity, and industrial metering peripherals. When designing with this device, ensure proper USB impedance matching and bypass capacitor placement near VDD pins. The Cortex-M0+ core supports Thumb-2 subset instructions; firmware development is streamlined through Microchip's MPLAB X IDE and Atmel START toolchain.
Drop-in alternatives for ATSAMD11D14A-MNT 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 ATSAMD11D14A-MNT (same form factor and footprint) β differing in Package, ADC, Operating Temperature, RoHS Status, Mounting Type.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMD11D14A-MUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD11C14A-SSUT
β Drop-Inβ In Stock
$1.8 / Unit
View Datasheet βATSAMD10D14A-MNT
β Drop-Inβ In Stock
$1.42 / Unit
View Datasheet βATSAMD11D14A-MNT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Clock | 48 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| Supply Voltage | 1.6 V to 3.6 V |
| Operating Temperature | -40C to +105C |
| Package | 24-QFN (4x4 mm) with EP |
| USB Interface | USB 2.0 Full-Speed Device with on-chip PHY |
| GPIO Pins | Up to 22 programmable I/O pins |
| ADC | 12-bit, up to 350 ksps |
| SERCOM Channels | Up to 6 (configurable as I2C/SPI/UART) |
| Timer/Counters | 2x 16-bit TC, 1x 24-bit TCC |
| DMA Channels | 6-channel DMA controller |
| RTC | 32-bit Real-Time Clock |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (Green) |
ATSAMD11D14A-MNT Pin Configuration
| Pin 1 | PA02 β GPIO / ADC input (AIN[0]) |
| Pin 2 | PA03 β GPIO / ADC input (AIN[1]) |
| Pin 3 | PA04 β GPIO / SERCOM0 pad0 / VOUT (voltage regulator output) |
| Pin 4 | GND β Ground |
| Pin 5 | VDD β Digital supply voltage |
| Pin 6 | PA05 β GPIO / SERCOM0 pad1 / ADC (AIN[5]) |
| Pin 7 | PA06 β GPIO / SERCOM0 pad2 / ADC (AIN[6]) |
| Pin 8 | PA07 β GPIO / SERCOM0 pad3 / ADC (AIN[7]) |
| Pin 9 | PA08 β GPIO / SERCOM1 pad0 / ADC (AIN[8]) |
| Pin 10 | PA09 β GPIO / SERCOM1 pad1 / ADC (AIN[9]) |
| Pin 11 | PA10 β GPIO / SERCOM1 pad2 / ADC (AIN[10]) |
| Pin 12 | PA11 β GPIO / SERCOM1 pad3 |
| Pin 13 | PA14 β GPIO / SERCOM2 pad0 |
| Pin 14 | PA15 β GPIO / SERCOM2 pad1 |
| Pin 15 | PA16 β GPIO / SERCOM2 pad2 / I2S SD0 |
| Pin 16 | PA17 β GPIO / SERCOM2 pad3 / I2S MCK0 |
| Pin 17 | PA18 β GPIO / SERCOM3 pad0 |
| Pin 18 | PA19 β GPIO / SERCOM3 pad1 |
| Pin 19 | PA22 β GPIO / SERCOM3 pad2 / I2S FSD |
| Pin 20 | PA23 β GPIO / SERCOM3 pad3 / USB SOF 1kHz output |
| Pin 21 | PA24 β GPIO / SERCOM4 pad0 / USB D- (DM) |
| Pin 22 | PA25 β GPIO / SERCOM4 pad1 / USB D+ (DP) |
| Pin 23 | RESET β Reset input, active low |
| Pin 24 | VDDIO β I/O supply voltage (decoupled to VDD internally) |
Typical Applications
ATSAMD11D14A-MNT is suitable for 6 applications: USB HID Devices (Keyboard/Mouse/Gamepad), USB-to-Serial Converter Dongles, Home Automation Sensor Hubs, Consumer Electronics with USB Connectivity, Industrial Metering Peripherals, IoT Edge Sensor Nodes.
USB HID Devices (Keyboard/Mouse/Gamepad)
The ATSAMD11D14A-MNT integrates a USB 2.0 Full-Speed device controller with on-chip PHY, eliminating the need for external USB transceivers. Its 48 MHz Cortex-M0+ core provides sufficient processing bandwidth for HID report generation, while 16 KB Flash holds standard HID descriptors and class protocols. The 4 KB SRAM supports HID ring buffers for keyboard rollover scenarios. The 24-QFN 4x4 mm package fits compact peripherals, and the 22 GPIO pins drive matrix-scanned key switches directly.
Recommended
USB-to-Serial Converter Dongles
The ATSAMD11D14A-MNT's integrated USB device port and configurable SERCOM channels make it ideal for USB-to-UART bridge dongles. At 48 MHz, the Cortex-M0+ easily handles USB CDC ACM class protocols and baud rate generation up to 921600 bps. The 16 KB Flash fits CDC ACM firmware plus vendor-specific extensions, while 4 KB SRAM buffers USB packets. Used in the Arduino Nano Every board as the USB-serial converter, validating its bridge capabilities in production designs.
Recommended
Home Automation Sensor Hubs
The ATSAMD11D14A-MNT supports home automation hubs via its 6 SERCOM channels (I2C/SPI/UART), 12-bit ADC for sensor reading, and low-power modes for battery-operated endpoints. The Cortex-M0+ at 48 MHz runs Zigbee/Thread/Z-Wave co-processor command interfaces and processes sensor fusion in real time. Its 1.6-3.6 V supply range accommodates single-cell Li-ion battery rails typical in wireless sensor nodes. The 24-QFN 4x4 mm package supports miniaturized form-factor hubs.
Recommended
Consumer Electronics with USB Connectivity
The ATSAMD11D14A-MNT serves consumer products requiring USB device connectivity at low cost, such as USB toys, fitness trackers, and audio interfaces. The Cortex-M0+ executes USB vendor-class drivers efficiently at 48 MHz, and 16 KB Flash accommodates feature firmware. The 12-bit ADC at 350 ksps samples sensor data for fitness band applications. The compact 4x4 mm QFN enables wearable form factors. Operating from 1.6-3.6 V supports direct Li-ion battery power.
Recommended
Industrial Metering Peripherals
The ATSAMD11D14A-MNT's 12-bit ADC, RTC, and SERCOM channels suit industrial metering peripherals like flow meters and energy monitors. The 48 MHz Cortex-M0+ processes measurement algorithms while the 32-bit RTC timestamps consumption records. The 24-QFN package provides industrial temperature operation from -40C to +105C, suitable for outdoor enclosures. The DMA controller offloads ADC sampling, allowing the CPU to focus on calibration and communication with upstream data loggers.
Recommended
IoT Edge Sensor Nodes
The ATSAMD11D14A-MNT suits IoT edge nodes requiring USB for firmware update and provisioning. Its low-power Sleep and Idle modes enable battery-operated deployments, while 6 SERCOM channels connect multiple I2C sensors (temperature, humidity, accelerometers). The 12-bit ADC supports analog sensor readings, and the 16 KB Flash fits TinyML inference models for on-device anomaly detection. The Cortex-M0+ runs at 48 MHz, balancing performance with energy efficiency for battery-powered IoT endpoints.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD11D14A-MNT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD11D14A-MUT | ATSAMD11C14A-SSUT | ATSAMD10D14A-MNT |
|---|---|---|---|---|
| Package | 24-QFN (4x4 mm) | 24-QFN (4x4 mm) - same | 24-SOIC wide body - NOT same footprint | 24-QFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB |
| USB Controller | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | No USB |
| GPIO Count | 22 | 22 | 22 (in SOIC) | 22 |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Supply Voltage | 1.6-3.6 V | 1.6-3.6 V | 1.6-3.6 V | 1.6-3.6 V |
Key Differentiators
- Integrated USB 2.0 Full-Speed controller with on-chip PHY (vs ATSAMD10D14A-MNT)
- Same die and pinout across MNT and MUT suffixes (vs ATSAMD11D14A-MUT)
- 22 GPIO with 6 SERCOM channels for flexible peripherals (vs ATSAMC20J18A-MNT)
Design Notes
The ATSAMD11D14A-MNT integrates a 3.3V voltage regulator on VDD pin, but USB signaling requires a minimum 3.0V supply for proper USB DP/DM output levels. Decouple VDD with a 100 nF ceramic capacitor close to the pin, plus a 4.7 uF bulk capacitor. For battery-powered applications using 1.8V supplies below 3.0V, USB cannot enumerate - design accordingly or boost the supply.
Route the USB DP/DM differential pair with 90 ohm differential impedance on the PCB, keeping traces short and matched within 150 mils. Place the 24-QFN 4x4 mm EP thermal pad soldered to a ground pour with multiple thermal vias for heat dissipation. The exposed pad must be soldered for mechanical reliability; do not leave it floating on the land pattern.
Avoid using PA24/PA25 (USB DM/DP pins) as regular GPIO in USB applications - toggling them during USB traffic can cause enumeration failures. Configure RESET with a 10 kohm pull-up and a 100 nF decoupling capacitor. When migrating from ATSAMD10D14A-MNT, remove all USB stack references from firmware since the D10 lacks the USB controller. Verify the NVMCTRL lock bits are properly cleared during production programming.
Compliance Information
Green-compliant per Microchip product page (Mouser listing confirms 'GREEN' suffix). Not AEC-Q100 qualified - this is industrial/consumer grade. For automotive applications, consider ATSAMC21 variants with AEC-Q100 qualification.
