ATSAML10E14A-AUT - 32MHz Cortex-M23 MCU, 16KB Flash | Microchip
MPN: ATSAML10E14A-AUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.65 | $2.65 |
| 10 | $2.38 | $23.80 |
| 100 | $2.12 | $212.00 |
| 500 | $1.89 | $945.00 |
| 1,000 | $1.68 | $1,680.00 |
ATSAML10E14A-AUT Overview
What is a Cortex-M23 microcontroller? The ARM Cortex-M23 is an entry-level 32-bit microcontroller core that brings TrustZone security and the ARMv8-M architecture to cost-sensitive and ultra-low-power applications. It sits in the ARM hierarchy between the Cortex-M0+ (basic 32-bit) and the Cortex-M3/M4 (mid-range with DSP). Microcontrollers in this category include system-on-chip integration of CPU, Flash, SRAM, and peripherals, belonging to the broader family of embedded microcontrollers -> microprocessors -> semiconductors used in every IoT and edge device.
Key features of the ATSAML10E14A-AUT include a 32 MHz maximum CPU clock, an enhanced peripheral touch controller (PTC) for capacitive touch sensing, a 12-bit ADC, multiple serial interfaces (SERCOM), an ISO7816 smart card interface, and the Event System for peripheral-to-peripheral signaling without CPU intervention. It supports 1.62V to 3.63V supply voltage and offers configurable power domains managed by the Power Manager unit.
Technically, the device is built on a low-leakage process and uses Microchip's proprietary sleepwalking technology - peripherals can wake the CPU only on relevant events, keeping the core asleep most of the time. TrustZone for ARMv8-M allows isolation of secure firmware from non-secure application code, a first for this class of MCU.
Typical applications include IoT sensor nodes, smart card readers, capacitive touch user interfaces, wearables, smart meters, and any battery-powered device where sleep current dominates the energy budget. Designers choose this part when picoamp quiescent current matters more than raw CPU throughput.
Design consideration: leverage the Event System to keep the CPU in standby while peripherals service interrupts, and respect the decoupling network recommendation in the manufacturer datasheet. Trade-off: the 16KB Flash limits code size - migrate to ATSAML10E16A or ATSAML10D16A for larger applications.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATSAML10E14A-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 ATSAML10E14A-AUT (same form factor and footprint) — differing in ADC, Mounting Type, Active Current, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML10E14A-AF
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →ATSAML10E15A-AUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10E16A-AUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10E14A-AUT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 (ARMv8-M with TrustZone) |
| Maximum CPU Clock | 32 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| Supply Voltage (VDD) | 1.62 V to 3.63 V |
| Active Current | <25 uA/MHz |
| Sleep Current | <100 nA |
| Package | 32-pin TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| ADC | 12-bit |
| Touch Controller | Peripheral Touch Controller (PTC) |
| Serial Interfaces | SERCOM (configurable as UART/SPI/I2C) |
| Smart Card Interface | ISO7816 |
| RoHS Status | Compliant |
ATSAML10E14A-AUT Pin Configuration
| Pin 1 | PA02 — GPIO / ADC input |
| Pin 2 | PA03 — GPIO / ADC input / DAC output |
| Pin 3 | PA04 — GPIO / ADC input |
| Pin 4 | PA05 — GPIO / ADC input |
| Pin 5 | PA06 — GPIO / ADC input |
| Pin 6 | PA07 — GPIO / ADC input |
| Pin 7 | VDD — Main power supply |
| Pin 8 | GND — Ground |
| Pin 9 | PA08 — GPIO |
| Pin 10 | PA09 — GPIO |
| Pin 11 | PA10 — GPIO |
| Pin 12 | PA11 — GPIO / SERCOM I/O |
| Pin 13 | PA14 — GPIO / SERCOM I/O |
| Pin 14 | PA15 — GPIO / SERCOM I/O |
| Pin 15 | PA16 — GPIO / SERCOM I/O |
| Pin 16 | PA17 — GPIO / SERCOM I/O |
| Pin 17 | PA18 — GPIO / SERCOM I/O |
| Pin 18 | PA19 — GPIO / SERCOM I/O |
| Pin 19 | PA22 — GPIO / SERCOM I/O |
| Pin 20 | PA23 — GPIO / SERCOM I/O |
| Pin 21 | PA24 — GPIO |
| Pin 22 | PA25 — GPIO |
| Pin 23 | PA27 — GPIO |
| Pin 24 | RESETn — Reset input (active low) |
| Pin 25 | VDD — Main power supply |
| Pin 26 | GND — Ground |
| Pin 27 | SWCLK — Serial Wire Debug clock |
| Pin 28 | SWDIO — Serial Wire Debug data |
| Pin 29 | PA30 — GPIO / SWD clock secondary |
| Pin 30 | PA31 — GPIO / SWD data secondary |
| Pin 31 | VDDANA — Analog power supply |
| Pin 32 | GND — Ground |
Typical Applications
ATSAML10E14A-AUT is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Capacitive Touch HMI, Smart Card Readers (ISO7816), Wearable Health Monitors, Smart Energy Meters, Industrial Sensor Transmitters.
Battery-Powered IoT Sensor Nodes
The ATSAML10E14A-AUT's sub-100 nA sleep current and 25 uA/MHz active consumption enable multi-year operation from a single CR2032 coin cell in duty-cycled wireless sensor nodes. The Event System wakes the CPU only on threshold-crossing events from the ADC, while the SERCOM blocks manage SPI/I2C sensor polling without CPU intervention. Compared to Cortex-M0+ alternatives, the ATSAML10E14A-AUT adds TrustZone for secure over-the-air firmware updates. Placed as the central MCU between a sensor front-end and a sub-GHz radio like AT86RF212B; use the datasheet's recommended 1 uF VDDREG decoupling to suppress regulator ripple during sleep-wake transitions.
Recommended
Capacitive Touch HMI
The integrated Peripheral Touch Controller (PTC) supports up to 32x32 touch channels with hardware-accelerated scanning, allowing the ATSAML10E14A-AUT to drive touch buttons, sliders, and wheels without an external touch IC. Wake-on-touch capability activates the system from deep sleep on user interaction - critical for battery-powered appliances. The 12-bit ADC supports proximity sensing as a complementary input modality. Use the part with the ATSAMHA1E16A-XPRO evaluation board to prototype PTC layouts; respect the datasheet's PCB layout guidelines for touch electrode traces (guard rings, ground flooding).
Recommended
Smart Card Readers (ISO7816)
The ATSAML10E14A-AUT integrates an ISO7816 smart card interface with hardware baud-rate auto-detection, eliminating external level shifters for 3V and 5V card classes. This is uncommon in Cortex-M23 MCUs at this price point and uniquely positions it for payment terminals, ID readers, and access control. The TrustZone for ARMv8-M isolates secure payment code from application firmware, helping meet PCI PTS requirements. Place the part in a TQFP-32 footprint with external ESD protection (USBLC6-2SC6) on the card contact pins.
Recommended
Wearable Health Monitors
Sub-100 nA sleep current and small TQFP-32 (7x7 mm) footprint suit the ATSAML10E14A-AUT for wearable heart-rate, SpO2, and activity monitors worn for days between charges. The Event System allows sensor data acquisition without waking the CPU, and the TrustZone isolates personal health data from generic application code. The 12-bit ADC with internal voltage reference and temperature sensor simplifies battery monitoring without extra components. Pair with a low-power analog front-end like MAX30102 for SpO2; leverage MPLAB Harmony v3 sensor drivers.
Recommended
Smart Energy Meters
The ATSAML10E14A-AUT's Cortex-M23 core delivers 32 MHz performance needed for real-time energy calculation algorithms while consuming less than 25 uA/MHz - critical for meters drawing power from current transformers. The 12-bit ADC (with optional PGA) accurately samples CT output waveforms for class 1.0 metering accuracy. The Event System synchronizes ADC sampling to a 32.768 kHz crystal-derived timebase for harmonic analysis. Place the part on a 4-layer PCB with isolated grounds between analog CT front-end and digital MCU sections.
Recommended
Industrial Sensor Transmitters
The ATSAML10E14A-AUT's industrial -40C to +85C temperature range and 4-20 mA loop compatibility (with external LDO and shunt regulator) suit it for 4-20 mA current-loop sensor transmitters in factory automation. The Event System manages HART modulation on the same SERCOM used for UART communication, supporting the HART communication protocol without extra silicon. Designers choose this part for low-power loops where sleep current dominates, requiring the MCU's <100 nA standby mode. Use the datasheet's recommended PCB stack-up for IEC 61000-4-2 ESD compliance on field terminals.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML10E14A-AUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML10E14A-AF | ATSAML10E15A-AUT | ATSAML10E16A-AUT | ATSAML10D14A-MF |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 24-pin QFN (different) |
| Core | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz |
| Flash | 16 KB | 16 KB | 32 KB | 32 KB | 16 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB | 4 KB |
| Sleep Current | <100 nA | <100 nA | <100 nA | <100 nA | <100 nA |
| Supply 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 |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Touch Controller | PTC integrated | PTC integrated | PTC integrated | PTC integrated | PTC integrated |
Key Differentiators
- Industry's lowest-power Cortex-M23 MCU (vs STM32L011K4T6)
- Integrated TrustZone for ARMv8-M (vs ATSAML10E14A-AF)
- On-board Peripheral Touch Controller (vs ATSAML10D14A-MF)
Design Notes
Decoupling: place a 100 nF ceramic on each VDD pin within 3 mm, plus a bulk 1 uF ceramic on VDDREG. The on-chip voltage regulator requires VDDREG decoupling to suppress switching noise - omitting this capacitor causes sleep current to rise above 1 uA per the datasheet. For battery-powered designs, use an LDO with low Iq (e.g., MCP1700) instead of a switching converter to avoid converter noise coupling into the ADC.
Place the 32.768 kHz crystal within 5 mm of XIN/XOUT pins with a continuous ground plane underneath. Avoid routing signal traces under the crystal traces - per the datasheet layout section, this prevents noise injection into the oscillator. For PCB stack-up, use a 4-layer board with the top layer for signals and a dedicated ground layer for shielding; this achieves the <100 nA sleep current spec.
Do not exceed 3.63 V on VDD - the on-chip Flash has a maximum voltage rating. Ensure unused GPIO pins are configured as outputs (not inputs with no pull) to avoid floating-pin current draws in the 1-10 uA range. The PTC pins require firmware calibration per Microchip application note; failing to calibrate reduces touch sensitivity and increases false triggers.
When using the ADC, place the analog input traces away from digital switching nodes. Use the internal 1.0V voltage reference with the 12-bit ADC for best linearity; for precision measurements, use VDDANA pin with external reference. The SERCOM configured as SPI can run up to 12 MHz at 3.3V VDD; verify timing budget against load capacitance per the I/O drive strength settings.
Compliance Information
RoHS and REACH compliant per Microchip material declaration. Lead-free T&R packaging (AUT suffix). AEC-Q100 not applicable - this is a consumer/industrial MCU, not automotive grade. For automotive applications, use the ATSAML10E14A-AUTKPH variant if available.
