ATSAMDA1E14B-MBT - ARM Cortex-M0+ MCU 48MHz 16KB Flash 32-VQFN
MPN: ATSAMDA1E14B-MBT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.96 | $19.60 |
| 100 | $1.74 | $174.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
ATSAMDA1E14B-MBT Overview
An ARM Cortex-M0+ microcontroller is a low-power 32-bit processor core designed for energy-efficient embedded applications. It belongs to the ARM Cortex-M family (which also includes M0, M3, M4, M7, M23, and M33 variants), sits within the broader category of microcontrollers (MCUs) -> embedded processors -> semiconductors. The M0+ is the most power-optimized member of the family, featuring a single-cycle I/O port and a 2-stage pipeline. Functional Safety (FuSa) variants like the SAM DA1 are designed to support IEC 60730 class B safety requirements for household appliances and similar regulated products.
Key features of the ATSAMDA1E14B-MBT include 4 SERCOM (Serial Communication Interface) modules that can each be independently configured as USART, I2C, or SPI, an 8-channel 12-bit ADC, a 10-bit DAC, and a full-speed USB 2.0 device interface. The device operates from 1.62V to 3.63V supply voltage, making it suitable for both battery-powered and 3.3V regulated systems.
The SAM DA1 architecture pairs the Cortex-M0+ core with Microchip's proprietary peripheral touch controller (PTC) supporting hardware-accelerated button, slider, and wheel sensing via Driven-Shield-plus technology. This on-chip PTC eliminates the need for an external touch IC and supports moisture-tolerant operation, which is critical for kitchen appliances, white goods, and outdoor control panels. The 32-VQFN (5x5 mm) package with exposed pad enables compact PCB layouts while providing good thermal dissipation for industrial temperature range (-40C to +85C) operation.
Typical applications include touch-based user interfaces for home appliances, USB HID peripherals, low-power IoT sensor nodes, and functional-safety household control boards such as washing machine front panels, induction cooker displays, and smart thermostats. The 4 SERCOM channels and integrated USB make it a versatile main controller for connected appliances.
When designing with this MCU, allocate sufficient PCB copper under the exposed pad for thermal relief, and follow the SAM DA1 datasheet reference PCB layout for the integrated PTC to achieve IEC 61000-4-6 conducted RF immunity compliance for capacitive touch performance.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM DA1 family, and practical design notes that complement but go beyond the manufacturer datasheet.
Drop-in alternatives for ATSAMDA1E14B-MBT — 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 ATSAMDA1E14B-MBT (same form factor and footprint) — differing in Package, RWW Flash, SERCOM Modules, ADC, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMDA1E15B-MBT
✅ Drop-In✓ In Stock
$2.12 / Unit
View Datasheet →ATSAMDA1E16B-MBT
✅ Drop-In✓ In Stock
$1.36 / Unit
View Datasheet →ATSAMDA1E14B-ABT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMDA1E14B-MBT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum Clock Speed | 48 MHz (45 DMIPS) |
| Program Memory (Flash) | 16 KB (16K x 8) |
| SRAM | 4 KB |
| RWW Flash | 512 bytes |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 32-VQFN (5x5 mm) with exposed pad |
| SERCOM Modules | 4 (each configurable as USART, I2C, or SPI) |
| ADC | 8-channel, 12-bit |
| DAC | 1-channel, 10-bit |
| USB | USB 2.0 Full-Speed Device |
| Peripheral Touch Controller (PTC) | Yes (Driven-Shield-plus, moisture tolerant) |
| Functional Safety (FuSa) | Yes (IEC 60730 class B support) |
| AEC-Q100 | Yes (Automotive grade) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ATSAMDA1E14B-MBT Pin Configuration
| Pin 1 | PA03 — GPIO / ADC AIN1 |
| Pin 2 | PA04 — GPIO / ADC AIN4 / VREFB |
| Pin 3 | PA05 — GPIO / ADC AIN5 |
| Pin 4 | PA06 — GPIO / ADC AIN6 |
| Pin 5 | PA07 — GPIO / ADC AIN7 |
| Pin 6 | PA08 — GPIO / SERCOM0 PAD0 (I2C SDA) |
| Pin 7 | PA09 — GPIO / SERCOM0 PAD1 (I2C SCL) |
| Pin 8 | PA10 — GPIO / SERCOM2 PAD2 |
| Pin 9 | PA11 — GPIO / SERCOM2 PAD3 / USB DM |
| Pin 10 | VDD — Digital supply voltage (1.62V-3.63V) |
| Pin 11 | GND — Ground |
| Pin 12 | PA14 — GPIO / SERCOM2 PAD2 |
| Pin 13 | PA15 — GPIO / SERCOM2 PAD3 |
| Pin 14 | PA16 — GPIO / SERCOM1 PAD0 / I2S FS |
| Pin 15 | PA17 — GPIO / SERCOM1 PAD1 / I2S SCK |
| Pin 16 | PA18 — GPIO / SERCOM1 PAD2 |
| Pin 17 | PA19 — GPIO / SERCOM1 PAD3 |
| Pin 18 | PA20 — GPIO / SERCOM3 PAD2 |
| Pin 19 | PA21 — GPIO / SERCOM3 PAD3 |
| Pin 20 | PA22 — GPIO / SERCOM3 PAD0 / I2C SDA |
| Pin 21 | PA23 — GPIO / SERCOM3 PAD1 / I2C SCL |
| Pin 22 | PA24 — GPIO / USB DP |
| Pin 23 | PA25 — GPIO / USB DM |
| Pin 24 | PA27 — GPIO |
| Pin 25 | PA28 — GPIO / Reset |
| Pin 26 | VDDIO — I/O supply voltage |
| Pin 27 | GND — Ground |
| Pin 28 | PA30 — GPIO / SWCLK |
| Pin 29 | PA31 — GPIO / SWDIO |
| Pin 30 | PB02 — GPIO / ADC AIN14 / PTC XY |
| Pin 31 | PB03 — GPIO / ADC AIN15 / PTC XY |
| Pin 32 | EP — Exposed thermal pad - connect to GND |
Typical Applications
ATSAMDA1E14B-MBT is suitable for 6 applications: Capacitive Touch User Interface, USB HID Peripheral Device, Functional Safety Household Appliance, Low-Power IoT Sensor Node, Automotive Body Electronics, Smart Thermostat Control Board.
Capacitive Touch User Interface
The ATSAMDA1E14B-MBT's integrated Peripheral Touch Controller (PTC) with Driven-Shield-plus technology makes it ideal for capacitive touch buttons, sliders, and wheels on home appliances such as induction cookers, washing machines, and ovens. The PTC handles up to 60 self-capacitance channels and 144 mutual-capacitance channels in hardware, leaving the Cortex-M0+ core free to run the appliance state machine. Per Microchip application notes, the moisture-tolerant scanning mode meets IEC 61000-4-6 conducted RF immunity for kitchen environments. Pair the MCU with a 3.3V LDO and an LED driver companion such as MIC3230 to build a complete UI subsystem.
Recommended
USB HID Peripheral Device
The integrated USB 2.0 Full-Speed device controller and 4 KB SRAM suit the ATSAMDA1E14B-MBT for USB Human Interface Device (HID) class products such as custom keyboards, programmable keypads, and pointer devices. Per the SAM DA1 datasheet, the USB module includes an internal 3.3V regulator and D+/D- 5V-tolerant pins, allowing direct bus-powered operation without an external LDO. The 48 MHz Cortex-M0+ core delivers 45 DMIPS, more than enough for HID polling at 1000 Hz. Use the SERCOM modules for SPI-connected NFC or BLE wake-up peripherals if needed.
Recommended
Functional Safety Household Appliance
The FuSa-qualified ATSAMDA1E14B-MBT is targeted at IEC 60730 class B household appliances, supporting automatic software self-tests for the CPU, RAM, Flash, clock, and ADC peripherals. Microchip provides pre-certified safety libraries that shorten appliance certification timelines by 6-12 months. The 8-channel 12-bit ADC supports accurate temperature sensing for refrigerator defrost cycles and oven thermal management. Pair with the MCP9808 I2C temperature sensor and a relay driver such as the MCP14A0152 for a complete safety-certified white-goods control board.
Recommended
Low-Power IoT Sensor Node
The ATSAMDA1E14B-MBT's Cortex-M0+ core and SAM DA1 sleep modes (down to < 1 uA in STANDBY) make it well-suited for battery-powered IoT sensor nodes that spend most of their time asleep. Per the SAM DA1 datasheet, the device wakes in < 5 us from STANDBY on SERCOM or ADC interrupts, enabling duty-cycled temperature, humidity, or motion sensing at multi-year battery life. The 12-bit ADC pairs with analog sensors like the MCP9700 temperature sensor. Use the 4 KB SRAM to buffer sensor data between SERCOM (I2C/SPI) transmissions.
Recommended
Automotive Body Electronics
The ATSAMDA1E14B-MBT's AEC-Q100 qualification, -40C to +85C industrial temperature range, and CAN-ready SERCOM configuration make it a fit for automotive body controllers such as HVAC control heads, seat-adjust switches, and steering-wheel button clusters. The integrated PTC replaces mechanical switches for sealed, water-resistant human-machine interfaces. The 32-VQFN 5x5 mm footprint and exposed pad enable compact dashboard PCB layouts. Pair with the MCP2517FD CAN-FD controller for vehicle network connectivity.
Recommended
Smart Thermostat Control Board
The ATSAMDA1E14B-MBT's combination of 4 SERCOM, 12-bit ADC, capacitive touch, and USB is well-matched for smart thermostat main controllers that combine resistive or capacitive touch panels, multiple temperature sensors, and USB-based firmware update ports. The 48 MHz Cortex-M0+ comfortably runs a graphical UI state machine with up to 4 KB SRAM budget for display buffers. Per Microchip reference designs, the PTC supports slider-based set-point adjustment. Pair with the MCP9808 temperature sensor and an SPI-connected OLED display for a complete thermostat solution.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMDA1E14B-MBT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMDA1E15B-MBT | ATSAMDA1E16B-MBT | ATSAMDA1E14B-ABT |
|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | 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 |
| Flash | 16 KB | 32 KB | 64 KB | 16 KB |
| SRAM | 4 KB | 8 KB | 8 KB | 4 KB |
| SERCOM Modules | 4 | 4 | 4 | 4 |
| Capacitive Touch (PTC) | Yes | Yes | Yes | Yes |
| USB 2.0 FS | Yes | Yes | Yes | Yes |
| AEC-Q100 | Yes | Yes | Yes | Yes |
| Functional Safety (FuSa) | Yes (IEC 60730 class B) | Yes (IEC 60730 class B) | Yes (IEC 60730 class B) | Yes (IEC 60730 class B) |
Key Differentiators
- Integrated Peripheral Touch Controller (PTC) eliminates external touch IC (vs ATSAMD20J18A)
- Pre-certified Functional Safety library for IEC 60730 class B (vs ATSAMD21G18A)
- Full-speed USB 2.0 with internal 3.3V regulator (vs ATSAMD20J18A)
Design Notes
Connect the exposed thermal pad (pin 32 / EP) directly to the ground plane with at least 8 thermal vias in a 3x3 grid pattern. Per the Microchip SAM DA1 datasheet PCB layout guide, the EP must be a solid copper pour with low thermal resistance to dissipate worst-case 0.5 W under full ADC + USB + touch scanning load. Maintain a continuous ground reference under the VQFN body to prevent ground-bounce noise from corrupting ADC readings. Estimated: assumes 1 oz copper and JEDEC EIA/JESD51 test board; actual junction temperature rise should be measured in the final application.
Place a 100 nF X7R ceramic bypass capacitor within 2 mm of each VDD/VDDIO pin, plus a shared 4.7 uF bulk capacitor on the main 3.3V rail. Per Microchip reference designs for the SAM DA1 family, inadequate decoupling can cause the Cortex-M0+ core to enter undefined state during PTC scans because the high-frequency ADC reference shares the same analog supply. For battery-powered designs, add a 10 uF reservoir capacitor on VDDIO to support the inrush when the USB peripheral is enumerated.
Route the PTC touch sensing traces as short, balanced, guarded-by-ground tracks to maximize moisture-tolerant touch performance. Per Microchip AN2654 (PTC layout guidelines for the SAM DA1), the Driven-Shield-plus shield signal should be routed on an inner PCB layer directly under the touch sensor pattern, and the X/Y trace lengths must be matched to within 5 mm to avoid sensitivity imbalance. Keep the touch sensor area at least 5 mm away from switching regulator inductors and high-frequency clock traces.
Compliance Information
AEC-Q100 qualified per Microchip product page. RoHS and REACH compliance per Microchip environmental certifications. Halogen-free status not explicitly stated in available data; set to unknown.
