ATSAMD11D14A-UUT - 48MHz Cortex-M0+ MCU 16KB Flash | Microchip
MPN: ATSAMD11D14A-UUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.34 | $1.34 |
| 10 | $1.21 | $12.10 |
| 100 | $1.08 | $108.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.85 | $850.00 |
ATSAMD11D14A-UUT Overview
What is a Cortex-M0+ microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and peripherals. The ARM Cortex-M0+ is the smallest and most energy-efficient member of the ARM Cortex-M family, optimized for low-power embedded applications. Microcontrollers sit in the broader hierarchy of microprocessors -> ARM Cortex-M -> Cortex-M0+ -> microcontroller unit -> semiconductor, and SAM D11 devices target low-power, deterministic control with code-density advantages over 8-bit MCUs.
Key features of the ATSAMD11D14A-UUT include up to six SERCOM channels configurable as I2C, SPI, or UART, six 16-bit Timer/Counters (TC), a Real-Time Counter (RTC), a 12-channel 350 kbps 12-bit ADC, a 10-bit 350 kbps DAC, and an on-chip Full-Speed USB 2.0 transceiver. The device also features a 32-bit Event System for inter-peripheral signalling without CPU intervention, a Peripheral Touch Controller (PTC) for capacitive sensing, and a 32.768 kHz RTC with calendar mode.
Architecturally, the SAM D11 family uses a single-cycle I/O bus, a single-cycle multiplier, and a tightly-coupled SRAM implementation that yields 2.46 CoreMark/MHz performance. An integrated low-power voltage regulator and multiple sleep modes (IDLE, STANDBY, BACKUP) enable typical active currents around 3 mA at 48 MHz and deep-sleep currents below 1 uA, depending on configuration.
Typical applications include USB HID peripherals, smart-home sensor nodes, consumer wearables, low-cost home-automation hubs, capacitive-touch user interfaces, and industrial metering. The 20-ball WLCSP footprint suits space-constrained designs such as PC accessories, USB dongles, and small IoT sensor pods. Operating temperature spans -40C to +85C.
A key design consideration is the WLCSP assembly: PCB land-pattern design must follow Microchip IPC-7351 WLCSP guidelines to ensure reliable reflow. The 20-ball WLCSP shares a footprint with the SAM D10D family, allowing upward/downward migration with identical peripheral IP.
This page synthesizes Microchip datasheet data, distributor pricing, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for ATSAMD11D14A-UUT — 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-UUT (same form factor and footprint) — differing in Package, ADC, Mounting Type, RoHS Status, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD11D14A-MNT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.2 / Unit
View Datasheet →ATSAMD11D14A-MUT
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAMD11C14A-SSUT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.8 / Unit
View Datasheet →ATSAMD10D14A-MNT
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ATSAMD10D13A-MUT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.81 / Unit
View Datasheet →ATSAMD11D14A-UUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark/MHz | 2.46 |
| Program Flash | 16 KB |
| SRAM | 4 KB |
| Package | 20-ball WLCSP |
| Operating Voltage (VDD) | 1.62 V to 3.63 V |
| Operating Temperature | -40 C to +85 C |
| USB | USB 2.0 Full-Speed Host/Device with on-chip transceiver |
| SERCOM Channels | Up to 6 (configurable as I2C/SPI/UART) |
| ADC | 12-bit, up to 12 channels, 350 kSps |
| DAC | 10-bit, 1 channel, 350 kSps |
| Timers/Counters | 6 x 16-bit TC, 1 x 32-bit TCC |
| RTC | 32.768 kHz with calendar mode |
| Touch (PTC) | Peripheral Touch Controller supported |
| Event System | 12-channel inter-peripheral |
| Mounting Type | Surface Mount (WLCSP) |
| RoHS Status | Compliant (Green) |
ATSAMD11D14A-UUT 20-ball wlcsp Pin Configuration Guide
Pin configuration for ATSAMD11D14A-UUT (20-ball wlcsp 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 ATSAMD11D14A-UUT.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAMD11D14A-UUT is suitable for 6 applications: USB HID Peripherals, Smart Home Sensor Nodes, Consumer Wearables, Capacitive Touch User Interfaces, USB Dongles and Adapters, Industrial Metering Endpoints.
USB HID Peripherals
The ATSAMD11D14A-UUT's integrated USB 2.0 Full-Speed Host/Device controller with on-chip transceiver makes it an ideal core for USB HID devices such as keyboards, mice, game controllers, and custom HID interfaces. The 16 KB Flash is sufficient for HID class drivers and basic HID Report descriptors, while the 6-channel SERCOM set supports side-channel communication for I2C sensors or SPI peripherals inside the device. Designers can reduce BOM by eliminating the external USB PHY, and the Cortex-M0+ core at 48 MHz provides headroom for HID plus application logic. Pair this MCU with an ESD-protected USB connector to ship a fully USB-compliant peripheral.
Recommended
Smart Home Sensor Nodes
The ATSAMD11D14A-UUT's 6-channel SERCOM, 12-bit ADC, and low-power sleep modes below 1 uA make it well-suited for wireless sensor nodes that report temperature, humidity, or motion to a smart-home hub. The Cortex-M0+ core handles BLE/Zigbee module SPI or UART control while the ADC reads analog sensors; USB is reserved for factory provisioning and firmware update. With 16 KB Flash the MCU can run a light-weight mesh stack or Modbus-over-UART gateway, and the small WLCSP footprint drops cleanly into battery-powered sensor packages like door/window sensors or thermostats.
Recommended
Consumer Wearables
Wearable fitness bands and hearable charging cases need a tiny MCU with low active current, capacitive-touch sensing, and USB for charging dock interfaces. The ATSAMD11D14A-UUT integrates a Peripheral Touch Controller (PTC) for capacitive buttons and slider controls, a USB 2.0 Full-Speed device for charging dock communication, and the Cortex-M0+ core runs a simple RTOS for activity tracking. The 20-ball WLCSP is approximately 3.0 x 2.5 mm, fitting inside a wearable wristband or earbud case. Its 4 KB SRAM handles small sensor buffers without external memory, keeping BOM and board area minimal for miniaturized designs.
Recommended
Capacitive Touch User Interfaces
The ATSAMD11D14A-UUT's on-chip Peripheral Touch Controller (PTC) supports up to 12 capacitive buttons or a slider/wheel without external touch ICs. Combined with 16 KB Flash and the 12-bit ADC, the MCU implements a complete touch UI for appliances, smart locks, and industrial control panels. The Cortex-M0+ core delivers deterministic scan latency, while SERCOM channels drive I2C displays or SPI LED drivers that reflect touch state. Designers can implement proximity sensing, moisture-rejection algorithms, and waterproof-touch UI inside the 16 KB code budget, removing the BOM cost of a dedicated touch controller.
Recommended
USB Dongles and Adapters
USB dongles for firmware programming, wireless protocol bridging, or industrial field-bus adapters benefit from the ATSAMD11D14A-UUT's small WLCSP-20 footprint and integrated USB transceiver. A typical implementation uses USB CDC for a virtual COM port and SERCOM channels for SPI/I2C bridge targets; the 48 MHz Cortex-M0+ can sustain several hundred kbps of transparent bridge traffic. The 4 KB SRAM accommodates packet buffers, while 16 KB Flash fits a USB stack plus the application logic for protocol translation. Internal pull-ups on USB DP simplify the BOM to one connector and a few bypass capacitors.
Recommended
Industrial Metering Endpoints
Utility meters and sub-metering endpoints need a robust 32-bit core, ADC, RTC, and low sleep current - all delivered by the ATSAMD11D14A-UUT. The 12-bit ADC at 350 kSps handles voltage and current sensing in single-phase meters; the RTC with calendar mode timestamps consumption logs across power cycles. USB serves as the service/maintenance interface for technicians to extract data logs, while SERCOM ports drive an external LoRa module or NB-IoT modem. The -40 C to +85 C industrial temperature range and 20-ball WLCSP footprint also suit sealed meter enclosures with constrained board area.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD11D14A-UUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD11D14A-MNT | ATSAMD11D14A-MUT | ATSAMD11C14A-SSUT | ATSAMD10D14A-MNT | ATSAMD10D13A-MUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-ball WLCSP | QFN-24 (4x4 mm) | QFN-24 (4x4 mm) | SSOP-20 | QFN-24 (4x4 mm) | QFN-24 (4x4 mm) |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| USB Controller | USB 2.0 FS Host/Device | USB 2.0 FS Host/Device | USB 2.0 FS Host/Device | USB 2.0 FS Host/Device | No USB | No USB |
| Operating Temperature | -40 C to +85 C | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C | -40 C to +105 C | -40 C to +105 C |
Key Differentiators
- On-chip USB 2.0 Full-Speed transceiver (vs ATSAMD10D14A-MNT)
- Compact 20-ball WLCSP footprint (vs ATSAMD11D14A-MUT)
- 16 KB Flash with full peripheral set (vs ATSAMD10D13A-MUT)
Design Notes
Estimated: The 20-ball WLCSP has a typical land-to-ball pitch of 0.4 mm. PCB land-pattern design MUST follow Microchip IPC-7351 WLCSP guidelines (non-solder-mask-defined pads are recommended) and a microvia-in-pad or dog-bone fan-out is essential for reliable reflow. Avoid placing through-hole vias under the package; route all signals from the perimeter balls. Stencil aperture reduction of approximately 80% of the land area helps control solder joint volume and prevents bridging on the 0.4 mm pitch.
The ATSAMD11D14A-UUT operates from 1.62 V to 3.63 V on VDD. Place a 100 nF decoupling capacitor within 2 mm of each VDD ball and a bulk 4.7 uF capacitor near the package. The on-chip DFLL48M requires a 32.768 kHz crystal or internal 48 MHz clock source; for USB applications the crystal-less USB clock recovery mode can be used if the host tolerance is sufficient. Power the VDDIO and VDDIN balls from the same regulated rail with separate bulk capacitors to avoid USB jitter.
Do not confuse the WLCSP-20 'UUT' ordering code with the QFN-24 'MUT' or 'MNT' variants - the silicon is the same but the footprints are not pin-compatible. The trailing 'U' denotes 85 C, 'M' denotes 105 C, and 'N' denotes AEC-Q100 automotive grade. The 4 KB SRAM is shared between stack, heap, and USB buffers - reserve at least 1 KB for USB endpoint buffers when USB is enabled to avoid out-of-memory faults during full-speed enumeration.
Estimated: The WLCSP-20 thermal resistance theta_JA is approximately 35-40 C/W on a standard 4-layer JEDEC test PCB. At maximum active current of approximately 7 mA at 48 MHz and 3.3 V, self-heating is negligible (approximately 23 mW). However, sleep-mode self-heating is well below 1 mW; thermal design is rarely a concern unless the MCU is used as a USB host powering downstream devices through VBUS.
Compliance Information
Green-compliant per Microchip product page. Ordering code 'U' = industrial 85 C; 'M' = industrial 105 C; 'N' = AEC-Q100 automotive grade - the UUT variant is not AEC-Q100 qualified.
