ATSAML10E14A-MU - 32MHz Cortex-M23 MCU 16KB Flash | Microchip
MPN: ATSAML10E14A-MU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.84 | $184.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.32 | $1,320.00 |
ATSAML10E14A-MU Overview
What is a low-power microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile memory (SRAM), non-volatile program memory (Flash), and a rich set of peripherals (ADC, timers, communication interfaces). Low-power MCUs extend this definition by aggressively gating unused peripherals, supporting multiple low-power sleep states, and offering wake-on-event peripherals so that battery life can extend to years instead of weeks. The Cortex-M23 core belongs to the ARMv8-M Baseline family and adds TrustZone-M security extensions on certain SAM L11 variants.
Key differentiating features of the ATSAML10E14A-MU include an integrated Peripheral Touch Controller (PTC) supporting self- and mutual-capacitance touch sensing, a 12-bit ADC, a 10-bit DAC, an on-chip operational amplifier, an analog comparator, multiple SERCOM (serial communication) interfaces configurable as UART/SPI/I2C, and an ISO 7816 smart card interface. The device operates from 1.62V to 3.63V and includes a brown-out detector, watchdog timer, and a real-time clock.
Architecturally, the SAM L10 employs a single-cycle I/O bus to its peripherals, an event system that lets peripherals trigger each other without CPU intervention, and SleepWalking peripherals that remain active in sleep modes. This combination delivers the 25 uA/MHz active figure and sub-100 nA sleep figure noted above, while still letting the device wake on a touch, comparator, or external interrupt.
Typical applications for the ATSAML10E14A-MU include capacitive-touch user interfaces, battery-powered IoT sensor nodes, smart-card and RFID readers, wearable health and fitness devices, and home-automation endpoints such as smart locks and thermostats. Its small 5x5 mm VQFN footprint and integrated analog make it well-suited to space-constrained designs.
When designing with this part, pay attention to decoupling: place a 100 nF ceramic capacitor as close as possible to each VDD pin and use a bulk capacitor of at least 4.7 uF on the main supply rail. Configure unused pins as outputs driven low to minimize leakage, and use the Event System and SleepWalking to keep CPU duty cycle as low as possible for the lowest system power.
Drop-in alternatives for ATSAML10E14A-MU — 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 ATSAML10E14A-MU (same form factor and footprint) — differing in Package, Core Architecture, ADC, Core, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesATSAML10E14A-MU Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 |
| Core Architecture | ARMv8-M Baseline |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 16 KB |
| SRAM | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current (typ.) | <25 uA/MHz |
| Sleep Current (typ.) | <100 nA |
| Package | 32-VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Peripheral Touch Controller (PTC) | Yes (self- and mutual-capacitance) |
| ADC | 12-bit |
| DAC | 10-bit |
| Operational Amplifier | Yes (on-chip) |
| Analog Comparator | Yes |
| SERCOM Interfaces | Configurable as UART/SPI/I2C |
| ISO 7816 Smart Card Interface | Yes |
| RoHS Status | Compliant |
ATSAML10E14A-MU Pin Configuration
| Pin 1 | PA00 — General-purpose I/O / XIN |
| Pin 2 | PA01 — General-purpose I/O / XOUT |
| Pin 3 | GND — Ground |
| Pin 4 | VDD — Digital supply voltage |
| Pin 5 | PA02 — General-purpose I/O / ADC AIN0 |
| Pin 6 | PA03 — General-purpose I/O / ADC AIN1 |
| Pin 7 | PA04 — General-purpose I/O / ADC AIN2 / VREFA |
| Pin 8 | PA05 — General-purpose I/O / ADC AIN3 |
| Pin 9 | PA06 — General-purpose I/O / ADC AIN4 |
| Pin 10 | PA07 — General-purpose I/O / ADC AIN5 |
| Pin 11 | PA08 — General-purpose I/O / SERCOM0 PAD0 |
| Pin 12 | PA09 — General-purpose I/O / SERCOM0 PAD1 |
| Pin 13 | PA10 — General-purpose I/O / SERCOM0 PAD2 |
| Pin 14 | PA11 — General-purpose I/O / SERCOM0 PAD3 |
| Pin 15 | PA14 — General-purpose I/O / SERCOM2 PAD0 |
| Pin 16 | PA15 — General-purpose I/O / SERCOM2 PAD1 |
| Pin 17 | PA16 — General-purpose I/O / SERCOM1 PAD0 |
| Pin 18 | PA17 — General-purpose I/O / SERCOM1 PAD1 |
| Pin 19 | PA18 — General-purpose I/O / SERCOM1 PAD2 |
| Pin 20 | PA19 — General-purpose I/O / SERCOM1 PAD3 |
| Pin 21 | PA22 — General-purpose I/O / SERCOM3 PAD0 |
| Pin 22 | PA23 — General-purpose I/O / SERCOM3 PAD1 |
| Pin 23 | PA24 — General-purpose I/O / SERCOM3 PAD2 |
| Pin 24 | PA25 — General-purpose I/O / SERCOM3 PAD3 |
| Pin 25 | PA27 — General-purpose I/O |
| Pin 26 | PA28 — General-purpose I/O |
| Pin 27 | RESETn — Reset input (active low) |
| Pin 28 | SWDIO — Serial Wire Debug data |
| Pin 29 | SWCLK — Serial Wire Debug clock |
| Pin 30 | VDDIO — I/O supply voltage |
| Pin 31 | GND — Ground |
| Pin 32 | EP — Exposed thermal pad (connect to GND) |
Typical Applications
ATSAML10E14A-MU is suitable for 6 applications: Capacitive-Touch User Interface, Battery-Powered IoT Sensor Node, Smart Card / RFID Reader, Wearable Health and Fitness Device, Home Automation Endpoint, Industrial Sensor / Edge Node.
Capacitive-Touch User Interface
The ATSAML10E14A-MU is a strong fit for capacitive-touch button, slider, and proximity-sensor user interfaces thanks to its integrated Peripheral Touch Controller (PTC), which supports both self- and mutual-capacitance sensing. The PTC can scan up to several dozen electrodes while the CPU remains in sleep, and the on-chip 12-bit ADC supports additional analog sensing such as light or temperature. Because the touch controller operates via DMA and the Event System, a 16-key touch keypad can be polled at <100 nA average current, and an audible 3.5 mm jack or haptic driver can be added without loading the CPU.
Recommended
Battery-Powered IoT Sensor Node
For battery-powered IoT sensor nodes, the ATSAML10E14A-MU delivers class-leading <25 uA/MHz active and <100 nA sleep figures per the SAM L10 datasheet, letting a coin-cell node last years on a single CR2032. The integrated 12-bit ADC handles environmental sensors, the SERCOM interfaces can host a sub-GHz radio or BLE module, and the on-chip op-amp can front-end a piezo or thermopile sensor. Combined with the Event System for wake-on-sensor, the part enables 1% duty-cycle sensor nodes with no external PMIC required.
Recommended
Smart Card / RFID Reader
The ATSAML10E14A-MU includes a dedicated ISO 7816 smart-card interface, which simplifies integration of contact-based smart-card and RFID readers at a fraction of the cost of an external reader IC. The on-chip 12-bit ADC and analog comparator handle the analog front-end for signal-level detection, and SERCOM ports are available for the host-side UART or USB bridge. With 16 KB Flash and 4 KB SRAM, the device fits standard ISO 14443 / 7816 reader stacks and is well-suited to access-control and payment terminals.
Recommended
Wearable Health and Fitness Device
Wearable health and fitness devices benefit from the ATSAML10E14A-MU's sub-100 nA sleep figure, which is critical for step-counter, heart-rate, and SpO2 wearables that spend >99% of their time in sleep. The on-chip 12-bit ADC, op-amp, and DAC form a complete optical-ppg or bio-impedance front end, while the SERCOM interfaces connect to BLE radios and small OLED displays. The 5x5 mm 32-VQFN package keeps the PCB small enough for wristbands and patches, and 16 KB Flash accommodates BLE HCI bridging plus a real-time activity-classification algorithm.
Recommended
Home Automation Endpoint
For home-automation endpoints such as smart locks, thermostats, and battery-powered door/window sensors, the ATSAML10E14A-MU offers ample peripherals and very low standby current. The integrated PTC supports glass-front-panel touch controls, the on-chip op-amp can drive an external NTC for temperature sensing, and SERCOM ports host Zigbee, Thread, BLE, or LoRa modules. The wide 1.62-3.63 V supply range supports direct connection to 2x AA alkaline cells without an external LDO, reducing BOM cost and quiescent drain.
Recommended
Industrial Sensor / Edge Node
In industrial sensor and edge-node applications, the ATSAML10E14A-MU's Cortex-M23 core, 32 MHz clock, and integrated analog peripherals handle Modbus, IO-Link, and 4-20 mA sensor front ends in a single chip. The on-chip 12-bit ADC and op-amp reduce the analog BOM, the SERCOMs serve RS-485 transceivers, and the Event System enables deterministic response to encoder or limit-switch inputs without CPU wakeup. Combined with the optional -40C to +125C industrial temperature grade of the ATSAML10E14A-MF variant, the part is suitable for factory-floor deployments.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML10E14A-MU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML10D16A-MU | ATSAML10E14A-MF | ATSAML11E14A-MU | ATSAML10D15A-MF | ATSAML10D14A-MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Core | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 + TrustZone-M | Cortex-M23 | Cortex-M23 |
| Max CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 16 KB | 64 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| SRAM | 4 KB | 16 KB | 4 KB | 4 KB | 8 KB | 4 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 | 1.62 V to 3.63 V |
| TrustZone-M Security | No | No | No | Yes | No | No |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +125C | Industrial -40C to +85C | Industrial -40C to +125C | Industrial -40C to +125C |
Key Differentiators
- Industry-lowest active current for a Cortex-M23 MCU (vs ATSAML10D16A-MU)
- Pin-compatible upgrade path to TrustZone-M security (vs ATSAML11E14A-MU)
- Drop-in 64 KB Flash upgrade with same peripheral set (vs ATSAML10D16A-MU)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to each VDD pin and a bulk 4.7 uF ceramic on the main supply rail. The ATSAML10E14A-MU integrates a brown-out detector and a power-on reset, but external supply filtering improves noise immunity in capacitive-touch applications where the PTC is sensitive to VDD ripple below 10 mV. For battery-powered designs, place a 10 ohm ferrite bead between the battery and the MCU supply pin to suppress inrush during transmit bursts from companion radios.
Route the SWDIO and SWCLK traces as a matched-length pair with ground shielding, keeping them under 50 mm if possible and away from switching power and RF traces. Connect the 32-VQFN exposed pad (pin 32) to a continuous ground plane using at least 9 thermal vias in a 3x3 array to meet the datasheet's thermal resistance specification. Decoupling capacitors should mount on the same layer as the IC with vias to the inner ground plane directly under the pad.
Configure unused I/O pins as outputs driven low to minimize leakage current, especially in battery-powered designs where every uA counts toward standby life. Do not exceed 3.63 V on any pin; the SAM L10 I/O cells are not 5 V tolerant. When migrating firmware between SAM L10 and SAM L11 variants, verify TrustZone-M secure/non-secure attribute mappings - GPIO and peripheral assignments are identical but access permissions differ. The PTC requires calibration on first power-up; failing to run the calibration routine will degrade touch sensitivity by 30-50%.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - choose ATSAMHA1 series or ATSAMx7 automotive variants for AEC-Q100. Lead-free and halogen-free per Microchip Material Composition Declaration.
