ATSAMD20G14A-MUT - 32-bit ARM Cortex-M0+ MCU, 48MHz, 16KB Flash | Microchip
MPN: ATSAMD20G14A-MUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.34 | $2.34 |
| 10 | $2.1 | $21.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.45 | $1,450.00 |
| 2,500 | $1.28 | $3,200.00 |
ATSAMD20G14A-MUT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (SRAM), and programmable peripherals. The Cortex-M0+ core sits at the lowest end of the ARM Cortex-M family, optimized for minimal gate count, deterministic interrupt latency, and ultra-low active power. The SAM D20 family is positioned as a low-power, high-performance replacement for 8-bit and 16-bit MCUs in home automation, consumer, metering, and industrial applications. Within the SAM D20 family, the -G14 variant represents the 48-pin 16 KB Flash tier.
Key features of the ATSAMD20G14A-MUT include a 48 MHz maximum CPU clock, single-cycle 32-bit multiply, 14-channel 12-bit ADC with 350 kSamples/s throughput, up to six SERCOM (serial communication) interfaces configurable as UART, SPI, or I2C, a full-speed USB 2.0 device controller, a 24-bit timer/counter, RTC, and brown-out detection. The peripheral event system allows direct hardware-level signaling between peripherals without CPU intervention, which reduces latency and current draw.
Typical applications include smart-home sensor nodes, low-power wireless IoT endpoints, industrial control and metering front-ends, USB-CDC human-interface devices, and battery-powered wearables. The integrated USB 2.0 full-speed controller makes the ATSAMD20G14A-MUT a strong fit for low-cost USB devices, while the Cortex-M0+ core delivers more than 60 DMIPS of processing while consuming only a few milliamps active.
When designing with this MCU, verify that your firmware uses an Atmel/Microchip DFP device pack and a compatible toolchain (e.g., MPLAB X IDE with the XC32 compiler or Atmel Studio with GCC). This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAMD20G14A-MUT — 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 ATSAMD20G14A-MUT (same form factor and footprint) — differing in ADC, Family, Package, Mounting Type, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD20G14A-MU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD20G14A-MNT
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →ATSAMD20G14A-MN
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →ATSAMD20E15A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD20G14A-AU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATSAMC20G16A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD20G14A-MUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Architecture | 32-bit RISC |
| Family | SAM D20G |
| Maximum CPU Frequency | 48 MHz |
| CoreMark/MHz | 2.14 |
| Flash Program Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| Package | 48-QFN (7x7 mm) with exposed pad |
| Pin Count | 48 |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| ADC | 12-bit, up to 350 kSamples/s |
| Communication Interfaces | Up to 6 SERCOM (UART/SPI/I2C), USB 2.0 Full-Speed Device |
| Mounting Type | Surface Mount (QFN) |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
ATSAMD20G14A-MUT Pin Configuration
| Pin 1 | PA00 — I/O / SERCOM1[0] / ADC[0] |
| Pin 2 | PA01 — I/O / SERCOM1[1] / ADC[1] |
| Pin 3 | PA02 — I/O / SERCOM2[0] / ADC[2] |
| Pin 4 | PA03 — I/O / SERCOM2[1] / ADC[3] |
| Pin 5 | PA04 — I/O / SERCOM0[0] / ADC[4] / VDIV |
| Pin 6 | PA05 — I/O / SERCOM0[1] / ADC[5] |
| Pin 7 | PA06 — I/O / SERCOM0[2] / ADC[6] |
| Pin 8 | PA07 — I/O / SERCOM0[3] / ADC[7] |
| Pin 9 | VDDIO — Digital I/O supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — I/O / SERCOM2[0] / NMI |
| Pin 12 | PA09 — I/O / SERCOM2[1] / ADC[9] |
| Pin 13 | PA10 — I/O / SERCOM2[2] / ADC[10] |
| Pin 14 | PA11 — I/O / SERCOM2[3] / ADC[11] |
| Pin 15 | VDDIN — Voltage regulator input supply |
| Pin 16 | GND — Ground |
| Pin 17 | PA12 — I/O / SERCOM4[0] / ADC[12] |
| Pin 18 | PA13 — I/O / SERCOM4[1] / ADC[13] |
| Pin 19 | PA14 — I/O / SERCOM4[2] / ADC[14] |
| Pin 20 | PA15 — I/O / SERCOM4[3] / ADC[15] |
| Pin 21 | PA16 — I/O / SERCOM3[0] / I2S_SD0 |
| Pin 22 | PA17 — I/O / SERCOM3[1] / I2S_MCK0 |
| Pin 23 | PA18 — I/O / SERCOM3[2] / I2S_FS0 |
| Pin 24 | PA19 — I/O / SERCOM3[3] / I2S_SCK0 |
| Pin 25 | PA20 — I/O / SERCOM5[2] / GCLK_IO6 |
| Pin 26 | PA21 — I/O / SERCOM5[3] / GCLK_IO7 |
| Pin 27 | PA22 — I/O / SERCOM3[0] / TC4[0] |
| Pin 28 | PA23 — I/O / SERCOM3[1] / TC4[1] |
| Pin 29 | PA24 — USB_DM |
| Pin 30 | PA25 — USB_DP |
| Pin 31 | PA27 — I/O / GCLK_IO0 |
| Pin 32 | GND — Ground |
| Pin 33 | VDDIN — Voltage regulator input supply |
| Pin 34 | RESET — Reset input (active low) |
| Pin 35 | PA28 — I/O / GCLK_IO0 / TC1[2] |
| Pin 36 | PA29 — I/O / GCLK_IO1 / TC1[3] |
| Pin 37 | PA30 — I/O / SWCLK / TC2[0] |
| Pin 38 | PA31 — I/O / SWDIO / TC2[1] |
| Pin 39 | PB00 — I/O / SERCOM5[2] |
| Pin 40 | PB01 — I/O / SERCOM5[3] |
| Pin 41 | PB02 — I/O / SERCOM5[0] / ADC[0] |
| Pin 42 | PB03 — I/O / SERCOM5[1] / ADC[1] |
| Pin 43 | PB04 — I/O / SERCOM4[0] / ADC[12] |
| Pin 44 | PB05 — I/O / SERCOM4[1] / ADC[13] |
| Pin 45 | PB06 — I/O / SERCOM4[2] / ADC[14] |
| Pin 46 | PB07 — I/O / SERCOM4[3] / ADC[15] |
| Pin 47 | PB08 — I/O / SERCOM4[0] |
| Pin 48 | PB09 — I/O / SERCOM4[1] |
| Pin EP | GND_PAD — Exposed thermal pad, must be soldered to ground for thermal dissipation |
Typical Applications
ATSAMD20G14A-MUT is suitable for 6 applications: USB Human-Interface Device (HID), Smart-Home Sensor Node, Industrial Control & Metering Front-End, USB-CDC Communication Device, Battery-Powered Wearable Device, Low-Cost Wireless IoT Endpoint.
USB Human-Interface Device (HID)
The ATSAMD20G14A-MUT fits USB HID designs because the integrated USB 2.0 full-speed device controller with on-chip transceiver eliminates the external PHY, BOM cost, and PCB area. With 48 MHz CPU clock and 16 KB Flash, the MCU runs the standard USB stack plus vendor HID report logic with comfortable headroom. Placed on a small 4-layer PCB with 4.7 uF VBUS decoupling and the 22 ohm DM/DP series resistors, the device delivers reliable HID-class enumeration at 12 Mbps while drawing under 15 mA active.
Recommended
Smart-Home Sensor Node
For Zigbee/BLE-attached sensor nodes, the ATSAMD20G14A-MUT offers six SERCOM ports that map cleanly to SPI-attached sensors, I2C-attached environmental ICs, and a UART-linked wireless coprocessor. The Cortex-M0+ core running 48 MHz executes 12-bit ADC reads at up to 350 kSamples/s, suitable for thermistor and battery-monitor sampling. With SleepWalking peripherals and the Event System, the node can idle below 2 uA between sensor interrupts, extending coin-cell runtime by 5-10x over 8-bit baselines.
Recommended
Industrial Control & Metering Front-End
The ATSAMD20G14A-MUT suits industrial metering front-ends thanks to its 12-bit ADC, RTC calendar, and 1.62-3.6 V supply range covering battery and bus-powered meters. Operating from -40 C to +85 C, the part meets industrial temperature expectations, while the QFN-48 (7x7) exposed pad gives reliable thermal performance under continuous ADC sampling. Placed behind an isolation barrier with the 12-bit ADC monitoring shunt current and bus voltage, the MCU drives calibration and display update tasks with predictable interrupt latency.
Recommended
USB-CDC Communication Device
For USB-CDC virtual COM ports, the ATSAMD20G14A-MUT provides full-speed USB and 6 SERCOM channels at a unit cost typically below $2.30 in volume. The 16 KB Flash easily fits the Microchip CDC stack plus vendor command handling. Designers place a 5 V tolerant level shifter on the VBUS pin and route DM/DP with controlled 90 ohm differential impedance for USB 2.0 compliance. The MCU then appears as a virtual COM port on host PCs without external driver installation on modern Windows/macOS/Linux.
Recommended
Battery-Powered Wearable Device
The ATSAMD20G14A-MUT's 1.62 V minimum supply and deep-sleep current profile support coin-cell-powered wearables. The Event System allows sensor interrupts to wake the core without CPU overhead, while the integrated RTC handles timekeeping across shutdown. At 1.8 V operation the MCU draws only a few mA active and under 2 uA in BACKUP mode with RTC running, supporting weeks of standby life. The 7x7 QFN footprint is small enough for wrist-strap form factors.
Recommended
Low-Cost Wireless IoT Endpoint
For Wi-Fi/BLE gateway-attached endpoints, the ATSAMD20G14A-MUT runs the local sensor sampling and protocol framing while an external coprocessor handles the radio. Its SERCOM, ADC, and PWM channels cover most endpoint sensor interfaces; the 48 MHz Cortex-M0+ handles TLS/UDP framing for the host protocol. Compared to a discrete 8-bit MCU + ADC design, the SAM D20G14 reduces BOM by one IC and saves PCB area, with firmware upgradeability via bootloader over USB or UART.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD20G14A-MUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD20G14A-MU | ATSAMD20G14A-MNT | ATSAMD20G14A-MN | ATSAMD20E15A-MUT | ATSAMD20G14A-AU |
|---|---|---|---|---|---|---|
| Package | 48-QFN (7x7 mm) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-TQFP (7x7) - same pin count, different body |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) |
| Max CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB (+100%) | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB (+100%) | 2 KB |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| USB 2.0 Controller | Full-speed device integrated | Full-speed integrated | Full-speed integrated | Full-speed integrated | Full-speed integrated | Full-speed integrated |
Key Differentiators
- Integrated USB 2.0 full-speed controller with on-chip transceiver (vs PIC16F631-I/SS)
- 32-bit Cortex-M0+ core running 48 MHz with 2.14 CoreMark/MHz (vs PIC16F630-I/SL)
- 6 SERCOM channels configurable as UART/SPI/I2C plus USB (vs ATSAMD10D14A-MNT)
Design Notes
The 48-QFN (7x7) package has an exposed thermal pad (EP) on pin 49 that must be soldered to a ground copper pour of at least 4x4 thermal vias for heat dissipation. Per Microchip's SAM D20 hardware-design guide, place a 1 uF and a 100 nF decoupling capacitor pair within 2 mm of every VDDIN/VDDIO pin pair, with the smaller capacitor closest to the IC. Route the USB DM/DP pair as a 90 ohm differential trace with controlled impedance and length-matched to within 150 mil.
The ATSAMD20G14A-MUT's internal 1.2 V LDO draws power from VDDIN (1.62-3.6 V) and supplies the core logic. Estimated: with the core running at 48 MHz, all six SERCOM active, and the ADC sampling, the MCU consumes roughly 7-9 mA active. In STANDBY with RTC and one SERCOM running, current drops below 100 uA. For battery-powered designs, gate peripherals via the Event System and use the SleepWalking controller to keep the CPU clocked off until a peripheral interrupt wakes it.
Do not connect 5 V signals to any I/O pin; the absolute maximum on PAxx is VDDIO + 0.3 V (typically 3.6 V). For UART bridging to a 5 V host, use a level shifter such as the TXS0108E. Also, when using the USB controller, VBUS sensing requires an external divider to a 5 V tolerant pin - do not connect VBUS directly to PAxx without this divider. Finally, ensure the RESET pin is pulled up via 10 kohm and decoupled with a 1 nF capacitor for clean startup.
Compliance Information
RoHS compliant per DigiKey product listing. Not AEC-Q100 qualified; not designed for automotive use. Halogen-free status not explicitly stated in source data. Lead-free packaging standard for tape-and-reel QFN.
