ATSAMD20E14A-AN - SAM D20 ARM Cortex-M0+ MCU, 48MHz, 16KB Flash | Microchip
MPN: ATSAMD20E14A-AN β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.91 | $2.91 |
| 10 | $2.62 | $26.20 |
| 100 | $2.3 | $230.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.84 | $1,840.00 |
| 3,000 | $1.62 | $4,860.00 |
ATSAMD20E14A-AN Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripherals such as ADCs, timers, and communication controllers into one package. Within the semiconductor hierarchy, an MCU belongs to the broader class of integrated circuits (ICs) and is a key member of the embedded systems domain alongside microprocessors, DSPs, and FPGAs. The ATSAMD20E14A-AN specifically targets the low-power, deterministic end of the Cortex-M0+ market, balancing processing headroom with energy efficiency for always-on battery-powered products.
Key features of the ATSAMD20E14A-AN include the ARM Cortex-M0+ core with single-cycle I/O access, the Peripheral Touch Controller (PTC) supporting capacitive touch buttons and sliders, a full-speed USB 2.0 device interface (when paired with an external 48 MHz source), and Microchip's SERCOM modules that can be configured as UART, SPI, or I2C. The device also includes a Real-Time Clock (RTC), event system for inter-peripheral signalling without CPU intervention, and a SleepWalking mechanism that allows peripherals to wake the CPU only when meaningful events occur.
The architecture uses a 2-layer AHB bus matrix with separate bridges for ICODE/DCODE and the peripheral bridge, minimizing latency for deterministic interrupt response. The integrated voltage regulator supports a wide 1.62V to 3.63V supply range and can deliver the full 48 MHz across the entire range, simplifying battery and USB-powered designs.
Typical applications include home automation control panels, smart metering nodes, capacitive-touch user interfaces, low-power wireless sensor hubs, consumer electronics peripherals, and industrial control modules. Its low-power Sleep modes (down to a few microamperes) make it especially well-suited to battery-operated devices where idle current dominates the energy budget.
When designing with this part, place a 100 nF decoupling capacitor close to each VDD pin and a 4.7 Β΅F bulk capacitor at the regulator output. Configure unused pins as inputs with internal pull-up to minimise quiescent current.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for SAM D20 selection.
Drop-in alternatives for ATSAMD20E14A-AN 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 ATSAMD20E14A-AN (same form factor and footprint) β differing in Package, ADC, MSL Level, Operating Temperature, SERCOM Modules.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMD20E14B-AN
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD20E15A-AN
β Drop-Inβ In Stock
$1.55 / Unit
View Datasheet βATSAMD20E16A-AN
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD20E17A-AN
β Drop-Inβ In Stock
$2.4 / Unit
View Datasheet βATSAMD20E18A-AN
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD21E15B-AN
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD20E14A-AN Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ |
| Core Bit Width | 32-bit |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Operating Temperature Range (Industrial) | -40 Β°C to +105 Β°C |
| Package | 32-TQFP (7x7 mm) |
| Pin Count | 32 |
| Mounting Type | Surface Mount (Gull-Wing) |
| ADC | 12-bit, up to 14 channels |
| DAC | 10-bit, 1 channel |
| SERCOM Modules | Up to 6 (configurable as UART/SPI/I2C) |
| Peripheral Touch Controller (PTC) | Yes, hardware capacitive touch support |
| RTC | Yes, 32-bit Real-Time Clock |
| Event System | Yes, peripheral-to-peripheral signalling |
| MSL Level | MSL3 (168 hours) |
| RoHS Status | Compliant |
ATSAMD20E14A-AN Pin Configuration
| Pin 1 | VDDIO2 β VDDIO2 supply voltage for SERCOM and I/O bank 2 |
| Pin 2 | GND β Common ground reference |
| Pin 3 | PA00 β General-purpose I/O / ADC input |
| Pin 4 | PA01 β General-purpose I/O / ADC input |
| Pin 5 | PA02 β General-purpose I/O / ADC / DAC output |
| Pin 6 | PA03 β General-purpose I/O / ADC / DAC reference |
| Pin 7 | PA04 β General-purpose I/O / ADC |
| Pin 8 | PA05 β General-purpose I/O / ADC |
| Pin 9 | PA06 β General-purpose I/O / ADC |
| Pin 10 | PA07 β General-purpose I/O / ADC / SERCOM |
| Pin 11 | PA08 β General-purpose I/O / SERCOM / PTC |
| Pin 12 | PA09 β General-purpose I/O / SERCOM / PTC |
| Pin 13 | PA10 β General-purpose I/O / SERCOM / PTC |
| Pin 14 | PA11 β General-purpose I/O / SERCOM / PTC |
| Pin 15 | VDD β Main digital supply voltage |
| Pin 16 | GND β Common ground reference |
| Pin 17 | PA14 β General-purpose I/O / SERCOM |
| Pin 18 | PA15 β General-purpose I/O / SERCOM |
| Pin 19 | PA16 β General-purpose I/O / SERCOM |
| Pin 20 | PA17 β General-purpose I/O / SERCOM |
| Pin 21 | PA18 β General-purpose I/O / SERCOM |
| Pin 22 | PA19 β General-purpose I/O / SERCOM |
| Pin 23 | PA20 β General-purpose I/O / SERCOM |
| Pin 24 | PA21 β General-purpose I/O / SERCOM |
| Pin 25 | PA22 β General-purpose I/O / SERCOM |
| Pin 26 | PA23 β General-purpose I/O / SERCOM |
| Pin 27 | PA24 β General-purpose I/O / SERCOM |
| Pin 28 | PA25 β General-purpose I/O / SERCOM |
| Pin 29 | VDD β Main digital supply voltage |
| Pin 30 | GND β Common ground reference |
| Pin 31 | SWCLK β Serial Wire Debug clock input |
| Pin 32 | SWDIO β Serial Wire Debug data I/O |
Typical Applications
ATSAMD20E14A-AN is suitable for 6 applications: Smart Home Touch Control Panel, Battery-Powered Wireless Sensor Node, Industrial Metering and Data Logger, Consumer Electronics Peripheral / Dongle, Industrial Control Module, LED Lighting Controller.
Smart Home Touch Control Panel
The ATSAMD20E14A-AN's integrated Peripheral Touch Controller (PTC) supports up to 14 capacitive touch channels, enabling sleek glass-fronted control panels with no mechanical buttons. The 48 MHz Cortex-M0+ core handles capacitive scanning, slider/button decoding, and BLE/Sub-GHz radio handshaking via the SERCOM interfaces without CPU bottlenecks. Its 1.62 V to 3.63 V supply range accepts direct Li-ion or 2xAA cells, while the 105 Β°C industrial temperature grade tolerates enclosures near LED backlights or warm kitchen installs.
Recommended
Battery-Powered Wireless Sensor Node
With active current under 7 mA at 48 MHz and deep-sleep currents in the single-digit Β΅A range, the ATSAMD20E14A-AN is well suited for coin-cell or LiPo-powered sensor endpoints. The 12-bit ADC delivers accurate ratiometric measurements from analog sensors, while SERCOM ports can host SPI sensors, I2C peripherals, and UART-connected radios. The wide 1.62 V to 3.63 V operating range allows direct connection to nearly any battery chemistry without a separate LDO, simplifying the BOM and extending battery life.
Recommended
Industrial Metering and Data Logger
The ATSAMD20E14A-AN's 12-bit ADC, hardware RTC, and event system make it a strong fit for energy, water, or gas metering where deterministic sampling and time-stamped event logging are required. The Cortex-M0+ core runs metering algorithms while the Event System routes tamper and zero-cross interrupts without CPU overhead. The 32-TQFP industrial-grade package operates reliably from -40 Β°C to +105 Β°C in outdoor enclosures, and the 48 MHz performance supports simultaneous metering, LCD driving, and AES-based security tasks.
Recommended
Consumer Electronics Peripheral / Dongle
The ATSAMD20E14A-AN serves as a low-cost main controller in USB dongles, BLE beacons, IR remote controls, and HID peripherals. The 48 MHz Cortex-M0+ core handles USB CDC/HID stacks, button matrix scanning, and LED animations. Its compact 32-TQFP footprint keeps PCB size small while the surface-mount gull-wing leads enable low-cost assembly. Multiple SERCOM modules support concurrent Bluetooth module (UART) plus SPI flash plus I2C sensor integration in a single chip.
Recommended
Industrial Control Module
In PLC-style I/O modules, the ATSAMD20E14A-AN provides deterministic Cortex-M0+ processing for digital I/O expansion, PWM-driven motor or valve control, and isolated communication links. The 105 Β°C temperature rating supports inside-enclosure operation, and the event system allows fast inter-peripheral response for safety-critical signals. SERCOM ports drive RS-485 transceivers via UART, Modbus slaves via SPI-to-wireless modules, or CAN-like protocols with software bit-banging where hardware CAN is not required.
Recommended
LED Lighting Controller
The ATSAMD20E14A-AN drives WS2812B, APA102, or PWM-based LED strips and panels with up to six SERCOM channels for DMX, SPI, or UART control links. The 48 MHz Cortex-M0+ delivers timing-accurate WS2812 bit-banging and smooth color animations across hundreds of pixels. Low-power sleep modes keep standby consumption minimal in smart bulbs, and the 1.62 V to 3.63 V range supports direct battery backup or USB-C powered operation.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD20E14A-AN β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD20E14B-AN | ATSAMD20E15A-AN | ATSAMD20E16A-AN | ATSAMD21E15B-AN |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7) | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB | 64 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 8 KB | 4 KB |
| Operating Voltage Range | 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 |
| USB 2.0 Device Controller | No | No | No | No | Yes (USB 2.0 Full-Speed) |
| PTC (Touch Controller) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Industrial 105 Β°C temperature grade with full 48 MHz operation (vs ATSAMD20E18A-AN)
- Integrated Peripheral Touch Controller (PTC) (vs ATSAMD20E14B-AN)
- Lower BOM cost than SAM D21 with USB (vs ATSAMD21E15B-AN)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to each VDD/VDDIO pin, and a single 4.7 Β΅F ceramic bulk capacitor at the regulator output. The ATSAMD20E14A-AN's wide 1.62 V to 3.63 V input range allows direct battery connection without an external LDO. Estimated: at 48 MHz active mode the device draws approximately 7 mA, so a 1 Β΅A/V LDO dropout is acceptable but not required for Li-ion designs.
Route the SWDIO and SWCLK debug signals as a short, matched pair (under 10 cm) and keep them away from high-frequency noise sources such as switching regulators and SPI clocks. The 32-TQFP package has gull-wing leads, so hand-rework is straightforward but avoid placing the part near tall connectors that block probe access.
Do not leave unused I/O pins floating - configure them as inputs with the internal pull-up enabled to minimise quiescent current and improve EMC robustness. The Peripheral Touch Controller (PTC) requires firmware calibration per the Atmel/Microchip PTC library; ensure the matching series and parallel capacitance values from the datasheet are respected to avoid false touches.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified; AEC-Q100 grade 2 variants are available separately in the SAM D20 family.
