ATSAMD20E14A-AUT - Cortex-M0+ MCU 48MHz 16KB FLASH TQFP-32
MPN: ATSAMD20E14A-AUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.75 | $2.75 |
| 10 | $2.45 | $24.50 |
| 100 | $2.15 | $215.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.74 | $1,740.00 |
| 2,500 | $1.55 | $3,875.00 |
ATSAMD20E14A-AUT Overview
An ARM Cortex-M0+ microcontroller is a low-power, energy-efficient 32-bit processor core widely used in embedded systems. It belongs to the Cortex-M family (Cortex-M0, M0+, M3, M4, M7) — a hierarchy of ARM cores targeted at microcontrollers rather than application processors. Cortex-M0+ sits at the low-power/low-cost end, offering Thumb-2 instruction set efficiency, single-cycle I/O access, and an optional Micro Trace Buffer. This positions the ATSAMD20E14A-AUT as a bridge between traditional 8-bit MCUs and higher-end Cortex-M3/M4 devices.
The ATSAMD20E14A-AUT features the SAM D20 peripheral set including a 12-channel SERCOM (configurable as I2C/SPI/USART), a 12-bit ADC with up to 10 channels, a 10-bit DAC, two analog comparators, and a 16-bit timer/counter. Six configurable SERCOM ports give multi-protocol serial flexibility. An Event System, Peripheral Touch Controller (PTC), and full-speed USB device interface complete the peripheral mix. The device supports 1.62 V to 3.63 V operation with multiple low-power modes (Idle, Standby, Backup, Hibernate).
The architecture combines a deterministic Cortex-M0+ core with Microchip's proprietary low-power techniques, achieving Active current below 70 µA/MHz and full-Stop mode retention below 5 µA. On-chip peripherals connect to the CPU via the AHB-APB bridge and event system, enabling fast inter-peripheral signalling without CPU intervention. An integrated 32 kHz RTC oscillator and PLL multiply the internal 8 MHz RC oscillator up to 48 MHz system clock.
Typical applications include home automation nodes, consumer electronics, smart metering, industrial sensor interfaces, and battery-powered IoT endpoints where 32-bit performance and ultra-low sleep current are both required. The TQFP-32 footprint suits hand-solderable prototypes while remaining production-friendly.
Designers should note that the ATSAMD20E14A-AUT requires the Atmel/Microchip ASF or MPLAB Harmony 3 framework, and programming via SWD using tools such as MPLAB X IDE / PICkit 4. Pin 1 (VDDIN) must be properly decoupled for stable core operation.
This page synthesizes distributor pricing, drop-in alternatives across the SAM D20 family, and practical design notes drawn from manufacturer documentation, going beyond what a single datasheet chapter covers.
Drop-in alternatives for ATSAMD20E14A-AUT — 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-AUT (same form factor and footprint) — differing in SRAM, Package, DAC, RoHS Status, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD20E14A-AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD20E15A-AUT
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →ATSAMD20E16A-AUT
✅ Drop-In✓ In Stock
$1.44 / Unit
View Datasheet →ATSAMD21E17A-AU
✅ Drop-In✓ In Stock
$2.3 / Unit
View Datasheet →ATSAMD20E14A-AUT
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →ATSAMD20E14A-AUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Architecture | 32-bit RISC |
| Maximum Clock Speed | 48 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| SRAM | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Package | 32-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature (Industrial) | -40C to +85C |
| Supply Voltage (Analog) | 1.62 V to 3.63 V |
| DAC | 10-bit |
| SERCOM (Configurable Serial) | Up to 6 channels |
| Comparators | 2 analog comparators |
| RTC | 32 kHz with calendar |
| PTC (Peripheral Touch Controller) | Yes |
| Event System | Yes (inter-peripheral signalling) |
| Debug Interface | SWD |
| RoHS Status | Compliant |
ATSAMD20E14A-AUT Pin Configuration
| Pin 1 | VDDIN — Voltage regulator input (1.62V to 3.63V) |
| Pin 2 | GND — Ground |
| Pin 3 | PA03 — GPIO/SERCOM/I2C |
| Pin 4 | PA04 — GPIO/SERCOM/TDI |
| Pin 5 | PA05 — GPIO/SERCOM/TDO |
| Pin 6 | PA06 — GPIO/SERCOM/SWDIO |
| Pin 7 | PA07 — GPIO/SERCOM/SWCLK |
| Pin 8 | PA08 — GPIO/SERCOM/XIN |
| Pin 9 | PA09 — GPIO/SERCOM/XOUT |
| Pin 10 | GND — Ground |
| Pin 11 | PA11 — GPIO/SERCOM |
| Pin 12 | PA14 — GPIO/SERCOM |
| Pin 13 | PA15 — GPIO/SERCOM |
| Pin 14 | PA16 — GPIO/SERCOM |
| Pin 15 | PA17 — GPIO/SERCOM |
| Pin 16 | PA18 — GPIO/SERCOM |
| Pin 17 | PA19 — GPIO/SERCOM |
| Pin 18 | PA20 — GPIO/SERCOM |
| Pin 19 | PA21 — GPIO/SERCOM |
| Pin 20 | PA22 — GPIO/SERCOM |
| Pin 21 | PA23 — GPIO/SERCOM |
| Pin 22 | PA24 — GPIO/SERCOM |
| Pin 23 | PA25 — GPIO/SERCOM/NRST |
| Pin 24 | PA27 — GPIO/TC0[1]/SWD[3] |
| Pin 25 | PA28 — GPIO/ADC[0] |
| Pin 26 | GND — Ground |
| Pin 27 | VDDIO — Digital I/O supply |
| Pin 28 | VDDIN — Voltage regulator input |
| Pin 29 | VREF — ADC voltage reference [DATA_NEEDED: pin exact assignment per E variant] |
| Pin 30 | PA30 — GPIO/ADC input [DATA_NEEDED: ADC channel mapping] |
| Pin 31 | PA31 — GPIO/ADC input [DATA_NEEDED: ADC channel mapping] |
| Pin 32 | VDDOUT — Voltage regulator output (decoupled 1.2V internally) |
Typical Applications
ATSAMD20E14A-AUT is suitable for 6 applications: Home Automation Controllers, Smart Metering Nodes, Battery-Powered IoT Sensors, Consumer Electronics HMI, Industrial Sensor Interfaces, Automotive Body Electronics.
Home Automation Controllers
The ATSAMD20E14A-AUT fits home automation hub and edge-node designs thanks to its Cortex-M0+ core at 48 MHz, low-power modes below 5 µA in Hibernate, and 6 SERCOM channels running USART/SPI/I2C. With 16 KB Flash it hosts a Matter-over-Thread bridge or Zigbee coordinator firmware. Pin-out TQFP-32 leaves enough GPIO to drive relays, sensors, and a user-interface keypad.
Recommended
Smart Metering Nodes
For electricity, water, or gas metering sub-ends the ATSAMD20E14A-AUT offers 12-bit ADC precision, sleep current below 1.5 µA in Hibernate, and battery-direct operation from 1.62 V to 3.63 V. The integrated 32 kHz RTC enables accurate time-stamping for billing. PTC touch sensing hardware replaces mechanical buttons, lowering BOM cost in user-interactive meter enclosures.
Recommended
Battery-Powered IoT Sensors
The ATSAMD20E14A-AUT suits wireless sensor nodes where standby current dominates over active power consumption. Duty-cycled at 0.1% with on-chip Hibernate consuming under 1.5 µA, a single CR2032 lasts years powering temperature, humidity, or PIR occupancy sensors. Cortex-M0+ handles sensor data fusion with AES hardware acceleration for secure edge-to-cloud messaging.
Recommended
Consumer Electronics HMI
With Peripheral Touch Controller (PTC) and 16-bit timer-driven LED/PWM, the ATSAMD20E14A-AUT drives capacitive-touch human-machine interfaces in kitchen appliances, audio devices, and wireless remote controls. 6 SERCOM ports connect to BLE modules, displays, and audio codecs. AEC-Q100 grading allows direct deployment into non-automotive consumer goods where reliability matters.
Recommended
Industrial Sensor Interfaces
For industrial 4-20 mA loop transmitters or RS-485 sensor hubs, the ATSAMD20E14A-AUT provides analog comparators for over-current detection, 12-bit ADC for transducer linearization, and SERCOM for RS-485 Modbus. Wide temperature range -40C to +85C covers factory-floor deployments. Hardware Event System lets ADC complete trigger SERCOM transmission without CPU intervention.
Recommended
Automotive Body Electronics
The AUT suffix signals Microchip's AEC-Q100 automotive qualification for body-domain modules such as HVAC seat controllers, interior lighting, and small DC motor drivers. Cortex-M0+ runs deterministic motor-control firmware with predictable interrupt latency. Operating voltage down to 1.62 V accommodates start-stop automotive battery transients where cranking dips rail voltage.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD20E14A-AUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD20E14A-AU | ATSAMD20E15A-AUT | ATSAMD20E16A-AUT | ATSAMD21E17A-AU |
|---|---|---|---|---|---|
| Package | TQFP-32 (7x7 mm) | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz |
| Flash | 16 KB | 16 KB | 32 KB | 64 KB | 128 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 8 KB | 16 KB |
| Operating Voltage | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
| Automotive Grade (AEC-Q100) | Yes (AUT) | Industrial (-40C to +85C) - not AEC-Q100 | Yes (AUT) | Yes (AUT) | Industrial grade - not AEC-Q100 |
| USB 2.0 Peripheral | No | No | No | No | Yes |
| Quantity-1 Price (USD) | 2.75 | 2.40 | 3.05 | 3.45 | 3.85 |
Key Differentiators
- Lowest-cost AEC-Q100 qualified Cortex-M0+ in TQFP-32 from Microchip (vs ATSAMD20E14A-AU)
- Hand-solderable TQFP package, far easier prototyping than QFN (vs ATSAMD20E14A-MUT (QFN-32))
- Eight-times headroom within pin-compatible family (vs ATSAMD20E14A-AUT itself)
Design Notes
Place a 1 µF X7R ceramic capacitor as close as possible to each VDDIN pin (pins 1 and 28 of TQFP-32), with a 100 nF decoupling cap in parallel. Estimated: the on-chip LDO delivers up to ~30 mA; running at 48 MHz and 3.3 V the core consumes roughly 8 mA, leaving margin for analog reference and I/O. Add a 4.7 µF bulk cap on VDDIO when driving significant GPIO load. Hibernate mode drops VDDIN current below 1.5 µA with RTC still running, enabling battery-direct designs.
TQFP-32 in 7x7 mm footprint needs a 4-layer or 2-layer PCB with at least 4 mil trace/space for fine-pitch escape on PA08/PA09 (XIN/XOUT). Place the 32.768 kHz crystal within 5 mm of pins 8-9 with traces short and matched, with a 1 MΩ feedback resistor across them. Per Microchip SAM D20 Hardware Design Checklist, expose both SWDIO (PA06, pin 6) and SWCLK (PA07, pin 7) on the PCB for in-system programming and debug.
Do NOT try to drive internal pull-up on PA30/PA31 (ADC inputs) when used as analog channels; user-threshold may be pulled outside Vref and bias the ADC reading. Configuration of SERCOM as USART/SPI/I2C requires careful mux selection: incorrect peripheral channel-to-pin mapping is the most common firmware startup failure on first prototypes. Always issue the SUPC->VDDREG = ENABLE register write before the first use of AVDDIO. Use Atmel-ICE or PICkit 4 for SWD debug; J-Link is supported but pinout pin 6/7 must remain as SWDIO/SWCLK (not reassigned to GPIO).
Compliance Information
AUT suffix indicates automotive-grade qualification per Microchip's product family ordering code conventions. RoHS compliant per Microchip's online product declaration. Halogen-free per manufacturer datasheet marking. AEC-Q100 grade per Microchip's automotive process flow.
