ATSAMD20E14A-MNT - 32-bit ARM Cortex-M0+ MCU, 48MHz, 16KB Flash, 32-VQFN
MPN: ATSAMD20E14A-MNT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.14 | $2.14 |
| 10 | $1.92 | $19.20 |
| 100 | $1.71 | $171.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.42 | $1,420.00 |
| 3,000 | $1.28 | $3,840.00 |
ATSAMD20E14A-MNT Overview
An ARM Cortex-M0+ microcontroller is an entry-level 32-bit MCU core built on the ARMv6-M architecture, optimized for energy efficiency and deterministic performance in cost-sensitive applications. Within the broader taxonomy, the Cortex-M0+ sits beneath Cortex-M3/M4/M7 cores, belongs to the microcontroller (MCU) family, falls under microcontrollers, then Integrated Circuits, and ultimately semiconductors. The SAM D20 series specifically targets low-power IoT and consumer designs where 8-bit MCUs previously dominated.
Key features of the ATSAMD20E14A-MNT include SleepWalking peripherals, an Event System for inter-peripheral signaling without CPU wakeup, six SERCOM channels configurable as I2C/SPI/UART, a 12-bit 350 kSPS ADC with up to 10 channels, a 10-bit 350 kSPS DAC, and an integrated PTC supporting up to 256 touch channels for capacitive button/slider designs. The device operates across -40C to +105C (industrial grade, per Mouser listing) and consumes < 70 uA/MHz active.
The MCU integrates a single-cycle hardware multiplier, NVIC with 32 interrupt lines, and a 24-bit SysTick timer. The peripheral event system and SERCOM configurability enable flexible pin mapping, simplifying PCB routing versus fixed-function MCUs. The 32-VQFN (5x5) package with exposed thermal pad (EP) supports -40C to +125C operation with AEC-Q100 compliance for automotive use cases when paired with the appropriate variant.
Typical applications include home automation nodes, smart metering, industrial sensor hubs, consumer electronics with capacitive touch UI, low-power wireless sensor platforms, and battery-powered IoT endpoints. The wide 1.62V-3.63V supply range permits direct operation from single-cell Li-ion or 3.3V regulated rails.
Design tip: route the SERCOM peripheral mapping during schematic capture to avoid costly layout rework - each of the six SERCOMs can be assigned to specific I/O pins, and choosing pins early simplifies later pinout changes.
This page consolidates distributor pricing, same-family alternatives (ATSAMD20E15A-MNT, ATSAMD20E16A-MNT, ATSAMD20E17A-MNT, ATSAMD20E18A-MNT), drop-in cross-brand equivalents, and practical design guidance beyond what the manufacturer datasheet offers alone.
Drop-in alternatives for ATSAMD20E14A-MNT — 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 ATSAMD20E14A-MNT (same form factor and footprint) — differing in ADC, SRAM, DAC, Package, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD20E15A-MNT
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →ATSAMD20E16A-MNT
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →ATSAMD20E17A-MNT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD20E18A-MNT
✅ Drop-In✓ In Stock
$2.48 / Unit
View Datasheet →ATSAMD20E14A-MU
✅ Drop-In✓ In Stock
$1.48 / Unit
View Datasheet →ATSAMD20E14B-ANT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD20E14A-MNT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Family | SAM D20E |
| Max CPU Frequency | 48 MHz |
| Program Memory (Flash) | 16 KB |
| SRAM | 2 KB |
| Supply Voltage | 1.62 V to 3.63 V |
| CoreMark/MHz | 2.14 |
| Operating Temperature | -40 C to +105 C |
| Package | 32-VQFN (5x5 mm) with Exposed Pad |
| ADC | 12-bit, up to 10 channels, 350 kSPS |
| DAC | 10-bit, 350 kSPS |
| Peripheral Touch Controller (PTC) | Up to 256 channels |
| SERCOM Modules | Up to 6 (configurable as UART/SPI/I2C) |
| GPIO Count (approx.) | 26 |
| RTC | Yes, 32.768 kHz support |
| Event System | Yes |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
ATSAMD20E14A-MNT Pin Configuration
| Pin 1 | PA00 — General-purpose I/O / SERCOM1[0] |
| Pin 2 | PA01 — General-purpose I/O / SERCOM1[1] |
| Pin 3 | PA02 — General-purpose I/O / AIN0 (ADC input) |
| Pin 4 | PA03 — General-purpose I/O / AIN1 (ADC input) / VREFA |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Power supply input (1.62V-3.63V) |
| Pin 7 | PA04 — General-purpose I/O / AIN2 / DAC output |
| Pin 8 | PA05 — General-purpose I/O / AIN3 |
| Pin 9 | PA06 — General-purpose I/O / AIN4 |
| Pin 10 | PA07 — General-purpose I/O / AIN5 |
| Pin 11 | PA08 — General-purpose I/O / SERCOM0[0] / I2S |
| Pin 12 | PA09 — General-purpose I/O / SERCOM0[1] / I2S |
| Pin 13 | PA10 — General-purpose I/O / SERCOM0[2] / I2S |
| Pin 14 | PA11 — General-purpose I/O / SERCOM0[3] / I2S |
| Pin 15 | PA14 — General-purpose I/O / XIN32 (32.768 kHz crystal in) |
| Pin 16 | PA15 — General-purpose I/O / XOUT32 (32.768 kHz crystal out) |
| Pin 17 | PA16 — General-purpose I/O / SERCOM1[0] |
| Pin 18 | PA17 — General-purpose I/O / SERCOM1[1] |
| Pin 19 | PA18 — General-purpose I/O / SERCOM1[2] |
| Pin 20 | PA19 — General-purpose I/O / SERCOM1[3] |
| Pin 21 | PA20 — General-purpose I/O / SERCOM3[0] |
| Pin 22 | PA21 — General-purpose I/O / SERCOM3[1] |
| Pin 23 | PA22 — General-purpose I/O / SERCOM3[2] |
| Pin 24 | PA23 — General-purpose I/O / SERCOM3[3] |
| Pin 25 | PA24 — General-purpose I/O / SERCOM2[0] / USB DP (D21 only) |
| Pin 26 | PA25 — General-purpose I/O / SERCOM2[1] / USB DM (D21 only) |
| Pin 27 | PA27 — General-purpose I/O |
| Pin 28 | RESET — Reset input (active low) |
| Pin 29 | SWDIO — Serial Wire Debug I/O |
| Pin 30 | SWCLK — Serial Wire Debug Clock |
| Pin 31 | GND — Ground (additional) |
| Pin 32 | VDD — Power supply (additional) |
Typical Applications
ATSAMD20E14A-MNT is suitable for 6 applications: Home Automation Sensor Node, Smart Metering Endpoints, Industrial Sensor Hubs, Consumer Capacitive Touch UI, Battery-Powered IoT Endpoints, Automotive Body Electronics (AEC-Q100 variants).
Home Automation Sensor Node
The ATSAMD20E14A-MNT fits home automation sensor nodes because its 16 KB Flash and 2 KB SRAM comfortably run Zigbee/BLE-stack front-ends, while the 12-bit ADC reads temperature, humidity, and light sensors directly. Its 1.62-3.63 V supply range allows direct connection to 2x AA alkaline or single-cell Li-ion batteries without an LDO. The 256-channel Peripheral Touch Controller enables reliable capacitive button or slider UI on glass front panels, and the Event System lets timers wake the CPU only on actual sensor events - achieving <5 uA average current in duty-cycled deployments.
Recommended
Smart Metering Endpoints
In smart electricity, water, and gas meters, the ATSAMD20E14A-MNT's Cortex-M0+ core and 48 MHz clock handle pulse counting and tamper detection on multiple GPIOs simultaneously. The integrated RTC with 32.768 kHz crystal support keeps accurate time-stamping even in deep-sleep modes below 5 uA. With 16 KB Flash and 2 KB SRAM, it runs metering stacks including DLMS/COSEM or Wireless M-Bus protocols. The 32-VQFN 5x5 package is small enough for retrofit meter modules and its -40C to +105C operating range covers outdoor meter enclosures.
Recommended
Industrial Sensor Hubs
The ATSAMD20E14A-MNT is well suited to industrial 4-20 mA loop-powered sensor hubs because of its wide 1.62-3.63 V supply, six configurable SERCOM channels for UART/SPI/I2C sensor aggregation, and 12-bit ADC accuracy. The hardware Event System routes sensor interrupts without CPU wakeup, dropping average power below 50 uA/MHz in active mode and into the sub-uA range in standby. The 32-VQFN with exposed pad enables operation up to +105C ambient in sealed IP65 enclosures. The 16 KB Flash fits Modbus RTU or IO-Link device stacks for protocol bridging.
Recommended
Consumer Capacitive Touch UI
The ATSAMD20E14A-MNT's integrated 256-channel Peripheral Touch Controller makes it ideal for consumer appliances with capacitive touch buttons, sliders, or proximity sensors, replacing mechanical switches with sealed glass front panels. The PTC supports both self- and mutual-capacitance sensing with hardware-driven scan sequences, leaving the Cortex-M0+ core free to handle HMI logic, LED driving via PWM, and BLE pairing. With 16 KB Flash, firmware can implement advanced features like water rejection and gesture recognition, while deep-sleep currents below 5 uA extend battery life in portable products.
Recommended
Battery-Powered IoT Endpoints
For battery-powered IoT endpoints such as asset trackers, environmental monitors, or wearable patches, the ATSAMD20E14A-MNT's SleepWalking peripherals and Event System deliver sub-uA sleep currents while autonomously scanning sensors and timers. The Cortex-M0+ at 48 MHz wakes in microseconds to process data, transmit via a companion radio, and return to sleep - achieving multi-year battery life on a single CR2032 coin cell. The 32-VQFN 5x5 mm footprint fits coin-cell form factors, and the 1.62 V minimum supply works directly from nearly-depleted batteries.
Recommended
Automotive Body Electronics (AEC-Q100 variants)
While the standard ATSAMD20E14A-MNT is rated -40C to +105C, the SAM D20E platform offers AEC-Q100 qualified variants in the same 32-VQFN footprint for automotive body electronics such as door modules, mirror controllers, HVAC flaps, and interior lighting. The Cortex-M0+ at 48 MHz handles LIN-bus stacks and PWM driving for motors and LEDs. The 12-bit ADC reads multiple analog sensors (position, temperature, current), and six SERCOM channels support LIN, SPI displays, and I2C sensors. Low standby currents below 5 uA preserve battery life when vehicles are parked.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD20E14A-MNT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD20E15A-MNT | ATSAMD20E16A-MNT | ATSAMD20E17A-MNT | ATSAMD20E18A-MNT | ATSAMD20E14A-MU | ATSAMD20E14B-ANT |
|---|---|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) with EP | 32-VQFN (5x5 mm) with EP | 32-VQFN (5x5 mm) with EP | 32-VQFN (5x5 mm) with EP | 32-VQFN (5x5 mm) with EP | 32-QFN (no EP) | 32-TQFP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 32 KB | 64 KB | 128 KB | 256 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 4 KB | 8 KB | 16 KB | 32 KB | 2 KB | 2 KB |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Supply Voltage | 1.62V-3.63V | 1.62V-3.63V | 1.62V-3.63V | 1.62V-3.63V | 1.62V-3.63V | 1.62V-3.63V | 1.62V-3.63V |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +85C | -40C to +105C |
| Silicon Revision | A | A | A | A | A | A | B |
Key Differentiators
- Smallest Flash option in SAM D20E 32-VQFN family (vs ATSAMD20E15A-MNT)
- Exposed pad for improved thermal dissipation (vs ATSAMD20E14A-MU)
- First-tier distributor availability with same-day shipping (vs ATSAMD20E14B-ANT)
Design Notes
The ATSAMD20E14A-MNT supports four power-saving modes: Idle, Standby, Backup, and Off. With the Event System and SleepWalking peripherals enabled, average current drops below 10 uA in duty-cycled sensor applications. Decouple VDD with a 100 nF X7R ceramic capacitor placed within 3 mm of the VDD pin and a bulk 4.7 uF on the same rail; tie all VDD pins together with a wide trace or pour. The exposed pad (EP) must be soldered to a grounded copper pour for thermal and electrical performance.
Use a four-layer PCB with a dedicated ground plane under the device for best EMC and thermal performance. Route the SWD signals (SWDIO, SWCLK, RESET) with a maximum trace length of 50 mm and keep them away from high-frequency switching nodes like SERCOM SPI clocks. For the 32.768 kHz crystal, place the crystal within 5 mm of the XIN32/XOUT32 pins and guard the traces with a grounded copper pour to minimize load-capacitance drift.
Do not leave the SWD pins floating during production - either pull SWDIO high through a 100 k resistor or disable the SWD interface in firmware. When migrating from ATSAMD20E14A-MNT (this part) to ATSAMD20E14B-ANT, check errata DS80000750 for fixed silicon bugs; the B revision adds new PTC features but maintains firmware compatibility. Always configure the NVMCTRL to write-protect the bootloader region before production programming to prevent accidental overwrites.
The SERCOM peripheral can be mapped to multiple pins, but switching pin assignments at runtime requires a peripheral disable/re-enable cycle. For high-speed SPI (above 8 MHz), use the SERCOM in master mode with DMA to offload byte transfers and avoid CPU stalls. The ADC requires a 10 nF bypass on AREF and a clean VDD reference - share ADC ground with MCU ground via a single-point connection to avoid ground-loop noise.
Compliance Information
RoHS compliant per DigiKey product listing. Standard industrial grade (-40C to +105C); AEC-Q100 qualified variants exist in the SAM D20E family for automotive use - verify part number suffix when selecting for automotive designs.
